Find the solution(s) for x in the equation below. x^2 + 10x + 21= 0
Answers
The solutions for ‘x’ in the given equation are – 3 and - 7
Step-by-step explanation:
Given equation:
[tex]x^{2} + 10 x + 21 = 0[/tex]
To find the ‘x’ value, try to factor, because in this case it works, it's fast. By using factor method, we get
(x + 3) (x + 7) = 0 (adding both value we get 10 and multiply as 21 as in equation and check with signs also while factoring)
x = - 3, -7
Verify above values by multiply both terms,
(x + 3) (x + 7) = 0
[tex]x^{2} + 7 x + 3 x + 21 = 0[/tex]
[tex]x^{2} + 10 x + 21 = 0[/tex] (so values obtained from factor method are correct)
Or, can use quadratic formula, for [tex]a x^{2} + b x + c=0[/tex], the solutions are given by:
[tex]x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}[/tex]
In the given equation, a = 1, b = 10, c = 21, apply these in above formula
[tex]x=\frac{-10 \pm \sqrt{10^{2}-(4 \times 1 \times 21)}}{2(1)}=\frac{-10 \pm \sqrt{100-84}}{2}[/tex]
[tex]x=\frac{-10 \pm \sqrt{16}}{2}=\frac{-10 \pm 4}{2}[/tex]
So,
When [tex]x=\frac{-10+4}{2}=\frac{-6}{2}=-3[/tex]
When [tex]x=\frac{-10-4}{2}=\frac{-14}{2}=-7[/tex]
Hence, the values for ‘x’ are - 3 and - 7
Answer:I got it right on quiz
Step-by-step explanation:
Related Questions
Ben’s driving test had 40 questions and he correctly answered 12 more than he missed. How many questions did he miss?
Answers
Answer:
He missed 14 questions
Step-by-step explanation:
Total = Right + Miss ⇒ t = r + m
Right = Miss + 12 ⇒ r = m + 12
t = 40
Since t = r + m and r = m + 12 then:
t = m + 12 + m
t = 2m + 12
40 = 2m + 12
28 = 2m
m = 14
Final answer:
Ben missed 14 questions.
Explanation:
To find the number of questions Ben missed, we can create an equation using the information given.
Let x represent the number of questions Ben missed.
We know that Ben correctly answered 12 more than he missed, so the number of questions he answered correctly can be represented as
x + 12.
Since the test had 40 questions, we can set up the equation:
x + (x + 12) = 40.
Simplifying this equation, we get
2x + 12 = 40.
Solving for x, we subtract 12 from both sides to get
2x = 28,
and then divide both sides by 2 to get
x = 14.
Therefore, Ben missed 14 questions.
Determine the sign of cos pi divided by seven
Answers
The sign of cos pi divided by seven is positive
Solution:
Given that we have to determine the sign of cos pi divided by seven
Let us first understand the signs of sine, cosine and tangent by quadrants
In the first quadrant, the values for sin, cos and tan are positive.
In the second quadrant, the values for sin are positive only.
In the third quadrant, the values for tan are positive only.
In the fourth quadrant, the values for cos are positive only.
Determine the sign of cos pi divided by seven
cos pi divided by seven ⇒ [tex]cos \frac{\pi}{7}[/tex]
The angle [tex]\cos \frac{\pi}{7}[/tex] lies in quadrant 1, Where angles are zero (0) to [tex]\frac{\pi}{2}[/tex]
In first quadrant, all trignometric functions are positive
so, [tex]\cos \frac{\pi}{7}[/tex] has positive sign.
4x-1=2x+11
what is the value of x and what are the steps?
Answers
Answer:
x=6
Step-by-step explanation:
4x-1=2x+11
4x-2x-1=11
2x-1=11
2x=11+1
2x=12
x=12/2
x=6
You need to isolate the variable or get x on one side of the = sign and a number on the other side.
1. Do the inverse operation and add one to each side of the equation. -1+1= 0 and 11+1=12
2. Subtract 2x from both sides. 2x-2x=0 and 4x-2x=2x.
So we are left with 2x=12 or 2 times some number “x” is equal to twelve.
3. Next we divide both sides by 2
2/2=1 and 12/2=6
So x=6
how can you use functions to solve real world problems ??
Answers
Answer:ioj;i;
hStep-by-step explanation:
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A cat is running away from a dog. After 5 seconds it is 16 feet away from the dog and after 11 seconds
it is 28 feet away from the dog. Let x represent the time in seconds that have passed and y represent the
distance in feet that the cat is away from the dog.
Answers
Answer:
18 feet
Step-by-step explanation:
Given:
A cat is running away from a dog.
After 5 seconds it is 16 feet away from the dog
After 11 seconds it is 28 feet away from the dog.
Let x represent the time in seconds that have passed and y represent the
distance in feet, so there are two points are formed such as (5, 16) and (11,28).
We will find the distance between dog and cat. by using distance formula of the two points.
[tex]d=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2} }[/tex]
Now we substitute the given value in above equation.
[tex]d=\sqrt{(11-5)^{2}+(28-11)^{2} }[/tex]
[tex]d=\sqrt{(6)^{2}+(17)^{2} }[/tex]
[tex]d=\sqrt{36+289}[/tex]
[tex]d=\sqrt{325}[/tex]
[tex]d=18.08\ feet[/tex]
18.08 ≅ 18
So [tex]d=18\ feet[/tex]
Therefore the distance between dog and cat is 18 feet.
To find the linear equation for the distance between the cat and the dog, we calculate the slope with the given points and use it with one of the points to establish the equation y = 2x + 6. A graph can be drawn with the points (5, 16) and (11, 28) to visualize the cat's path.
The linear equation describing the distance the cat is from the dog in relation to time can be determined using the two given points: (5, 16) and (11, 28), where 'x' is the time in seconds and 'y' is the distance in feet.
We first find the slope (m) of the line using the formula:
m = (y2 - y1) / (x2 - x1)
Plugging in the values we get:
m = (28 - 16) / (11 - 5) = 12 / 6 = 2
This means for each second that passes, the cat is 2 feet further away from the dog. Next, we use one of the points and the slope to write the equation in point-slope form. Using the point (5, 16) we have:
y - 16 = 2(x - 5)
Expanding and simplifying this equation gives us:
y = 2x + 6
This is the linear equation that describes the distance of the cat from the dog over time. To draw a graph, we plot the two points given and draw the line that passes through them, which will represent the cat's path. The slope of 2 indicates that for every 1 second, the distance increases by 2 feet.
Write the quadratic equation whose roots are 3 and 4, and whose leading coefficient is 2.
(Use the letter x to represent the variable.)
Answers
Step-by-step explanation:
equation-
(x-3) (x-4) =
[tex] {x }^{2} - 3x - 4x + 12 = {x}^{2} - 7x + 12[/tex]
Given the roots 3 and 4 of a quadratic equation, and the leading coefficient 2, the quadratic equation can be derived as 2x^2 - 14x + 24.
Explanation:To find a quadratic equation given its roots and leading coefficient, you use the factored form of a quadratic equation, x = (x - root1)(x - root2).
Given that the roots are 3 and 4, the equation takes the form of x = (x - 3)(x - 4). When you multiply this out, you get x^2 - 7x + 12.
The problem also states that the leading coefficient is 2, so we multiply our obtained equation by 2 to get: 2x^2 - 14x + 24.
So, the requested quadratic equation is 2x^2 - 14x + 24.
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What did Tarzan like to play?
Answers
Answer:
Step-by-step explanation:
a certain triangle has two 45 degree angles what type of triangle is it
Answers
Answer:
most likely isosceles
Step-by-step explanation:
due to the fact that two angles are congruent and the other angle is probably not it would make it all isosceles triangle
A triangle with two 45-degree angles is a special type of triangle known as an isosceles triangle.
In a triangle, if two angles are congruent, then the opposite sides of those angles are also congruent. In an isosceles triangle, two sides are equal in length, and the angles opposite those sides are congruent. Since two angles of the triangle are 45 degrees each, their opposite sides are also equal in length, making it an isosceles triangle.
15 − b × d ÷ c
for b = 1, c = 6, and d = 18.
Answers
Answer:
This is simple. And, you best not be cheating either.
15 - 1 x 18 / 6
1x18 = 18
18/6 is 3.
15 - 3 = 12
12 is the answer.
Step-by-step explanation:
PLEASE HELP I WILL GIVE BRAINLIEST PLEASEEEE HELP ME
Answers
Answer:
perpendicular bisector
Find an equation for the perpendicular bisector of the line segment whose endpoints are -7,-2 and 5,4
Answers
The equation of the perpendicular bisector of the line segment whose endpoints are (-7 , -2) and (5 , 4) is y = -2x - 1
Step-by-step explanation:
Let us revise some rules
The product of the slopes of the perpendicular line is -1, that means if the slope of one line is m, then the slope of the other is [tex]\frac{-1}{m}[/tex]The formula of the slope of a line whose endpoints are [tex](x_{1},y_{1})[/tex] and [tex](x_{2},y_{2})[/tex] is [tex]m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]The mid-point of a line whose endpoints are [tex](x_{1},y_{1})[/tex] and [tex](x_{2},y_{2})[/tex] is [tex](\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})[/tex]∵ A line has endpoints (-7 , -2) and (5 , 4)
∴ [tex]x_{1}[/tex] = -7 and [tex]x_{2}[/tex] = 5
∴ [tex]y_{1}[/tex] = -2 and [tex]y_{2}[/tex] = 4
- Use the formula of the slope up to find the slope of the line
∴ [tex]m=\frac{4-(-2)}{5-(-7)}=\frac{4+2}{5+7}=\frac{6}{12}=\frac{1}{2}[/tex]
To find the slope of the perpendicular line to the given line reciprocal it and change its sign
∵ The slope of the given line = [tex]\frac{1}{2}[/tex]
∴ The slope of the perpendicular line = -2
∵ The perpendicular line is a bisector of the given line
- That means the perpendicular line intersect the given line
at its midpoint
∵ The mid point of the given line = [tex](\frac{-7+5}{2},\frac{-2+4}{2})[/tex]
∴ The mid point of the given line = [tex](\frac{-2}{2},\frac{2}{2})[/tex]
∴ The mid point of the given line = (-1 , 1)
Now we wand to find the equation of the line whose slope is -2 and passes through point (-1 , 1)
∵ The form of the equation is y = mx + b, where m is the slope
and b is the y-intercept
∵ m = -2
- Substitute the value of m in the form of the equation
∴ y = -2x + b
- To find b substitute x and y in the equation by the coordinates
of a point on the line
∵ Point (-1 , 1) lies on the line
∴ x = -1 and y = 1
∵ 1 = -2(-1) + b
∴ 1 = 2 + b
- Subtract 2 from both sides
∴ -1 = b
- Substitute the value of b in the equation
∴ y = -2x + (-1)
∴ y = -2x - 1
The equation of the perpendicular bisector of the line segment whose endpoints are (-7 , -2) and (5 , 4) is y = -2x - 1
Learn more:
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Write the equation of the line that passes through (-1, 8) and is parallel to the line that passes through (5, -1) and (2, -5).
Answers
Answer:
[tex]\large\boxed{y=-\dfrac{3}{4}x+\dfrac{29}{4}}[/tex]
Step-by-step explanation:
[tex]\text{Let}\\\\k:y=m_1x+b_1,\ l:y=m_2x+b_2\\\\k\ ||\ l\iff m_1=m_2\\\\k\ \perp\ l\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\=================================[/tex]
[tex]\text{The formula of a slope:}\\\\m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
[tex]\text{Calculate the slops:}\\\\(5,\ -1),\ (2,\ -5)\\\\m_1=\dfrac{-5-(-1)}{2-5}=\dfrac{-5+1}{-3}=\dfrac{-4}{-3}=\dfrac{4}{3}\\\\\text{Therefore}\\\\m_2=-\dfrac{1}{\frac{4}{3}}=-1\left(\dfrac{3}{4}\right)=-\dfrac{3}{4}\\\\\text{Put the value of slope and coordinates of the given point (-1, 8) }\\\text{to the equation of a line:}\\\\8=-\dfrac{3}{4}(-1)+b\\\\8=\dfrac{3}{4}+b\qquad\text{subtract}\ \dfrac{3}{4}\ \text{from both sides}\\\\7\dfrac{1}{4}=b\to b=\dfrac{29}{4}\\\\\text{Finally:}\\\\y=-\dfrac{3}{4}x+\dfrac{29}{4}[/tex]
Please solve number 80
Answers
Answer:
option D. 20 cm
Step-by-step explanation:
step 1
Find the volume of the water
The volume of the water is equal to
[tex]V=LWH[/tex]
we have
[tex]L=60\ cm\\W=40\ cm\\H=50\ cm[/tex]
substitute
[tex]V=(60)(40)(50)[/tex]
[tex]V=120,000\ cm^3[/tex] ---> volume of water
step 2
Find the deep of the water, if the tank is returned to its horizontal position
we have
[tex]V=120,000\ cm^3[/tex]
[tex]L=100\ cm\\W=60\ cm\\H=?\ cm[/tex]
where
H is the deep of the water
substitute in the formula of volume
[tex]120,000=(100)(60)(H)[/tex]
solve for H
[tex]120,000=6,000)(H)[/tex]
[tex]H=20\ cm[/tex]
Prove that ABCD is a square if a A(1,3) B(2,0) C(5,1) and D(4,4)
Answers
[tex]AB=BC=CD=AD = \sqrt{10}[/tex]
As all the sides have same length, ABCD is a square
Step-by-step explanation:
To prove ABCD a square we have to find the lengths of each side
So,
the distance formula will be used to find the lengths
The distance formula is:
[tex]d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
Now,
[tex]AB = \sqrt{(2-1)^2+(0-3)^2}\\= \sqrt{(1)^2+(-3)^2}\\=\sqrt{1+9}\\=\sqrt{10}[/tex]
[tex]BC = \sqrt{(5-2)^2+(1-0)^2}\\= \sqrt{(3)^2+(1)^2}\\=\sqrt{9+1}\\=\sqrt{10}[/tex]
[tex]CD = \sqrt{(4-5)^2+(4-1)^2}\\= \sqrt{(-1)^2+(3)^2}\\=\sqrt{1+9}\\=\sqrt{10}[/tex]
[tex]AD = \sqrt{(4-1)^2+(4-3)^2}\\= \sqrt{(3)^2+(1)^2}\\=\sqrt{9+1}\\=\sqrt{10}[/tex]
we can see that
[tex]AB=BC=CD=AD = \sqrt{10}[/tex]
As all the sides have same length, ABCD is a square
Keywords: Distance formula, square
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A man gained rs. 3000 by selling a mobile set allowing 15 % discount on the marked price the loss would be rs. 8000. Find the marked price and cost price of a mobile set
Answers
Answer:
Marked price is Rs. 53333.33 and the cost price is Rs. 42333.33.
Step-by-step explanation:
Let Rs. x and Rs. y are the cost price and marked price of the mobile set respectively.
Now, the man has a loss of Rs. 8000 after giving a 15% discount on the marked price.
Therefore, 15% of y is 8000 i.e. [tex]8000 = \frac{y\times 15}{100}[/tex]
⇒ y = Rs. 53333.33
Now, the man gained Rs. 3000 by selling the mobile set allowing 15% discount on the marked price.
Therefore, the mobile set has the cost price = x = Rs. [(53333.33 - 8000) - 3000] = Rs. 42333.33 (Answer)
when a positive number is multiplied by itself, the result is equal to 3 more than twice the original amount. What is the value of that number?
Answers
Hope it helps u..........
If Point (3, 4) is reflected over the x-axis, what are the new coordinates?
(A.) (-4, -3)
(B.) (3, -4)
(C.) (-3, -4)
(D.) (-4, 3)
Answers
Answer:
If (3, 4) is reflected over the x-axis, the new coordinates are (3, -4).
The correct answer is B.
The diameter of a circle is 4 cm. Which equation can be used to find its circumference?
OC = T2
OC= Tx4
4
Answers
Answer: OC = πx4
Step-by-step explanation:
This question is incomplete, the correct question is
The diameter of a circle is 4 cm. Which equation can be used to find its circumference?
OC = πx2
OC= πx4
4
Answer,
Since the diameter is given as 4cm
Also,
The circumference of a circle OC = π x diameter
Therefore, OC = πx4
Tell whether the sequence is arithmetic. If it is, what is the common difference? -19,-11,-3,5,...
Answers
Every next number is incremented by 8 from the previous number hence the sequence is arithmetic and the common difference is 8.
Hope this helps.
Answer:
The given sequence is arithmetic and common difference is 8.
Step-by-step explanation:
Given that :
- 19, - 11, - 3, 5......
Here, a = - 19 ; a is the first term of the series.
Now, For common difference-
d = [tex]t_{2} - t_{1}[/tex] = [tex]t_{3} - t_{2}[/tex] = [tex]t_{4} - t_{3}[/tex]
Let [tex]t_{1} = - 19, t_{2} = - 11[/tex]
d = - 11 - (-19)
= -11 + 19
= 8
Let [tex]t_{3} = - 3, t_{2} = - 11[/tex]
d = - 3 -(-11)
= - 3 + 11
= 8
Let [tex]t_{4} = 5, t_{3} = - 3[/tex]
d = 5 - (-3)
= 8
In each condition common difference d is same therefore the given sequence is arithmetic and common difference d = 8.
An office building is 20 feet taller than twice the height of a bank building. If the office building is 320 feet tall, how tall is the bank building?
A. 150 feet
B. 160 feet
C. 180 feet
D. 300 feet
Plus explication thanks!
Answers
Answer: A the bank building is 150 feet tall.
Step-by-step explanation:
If you subtract 20 from 320 then you get 300 then divide that by 2 you get 150.
ASAP!What are the vertical asymptotes of the function f(x) = the quantity of 3x plus 9, all over x squared plus 4x minus 12?
A) x = −6 and x = −2
B) x = −6 and x = 2
C) x = 1 and x = −2
D) x = 1 and x = 2
Answers
Answer:
C
Step-by-step explanation:
Answer:
B) x = -6 and x = 2
Step-by-step explanation:
[tex]\frac{3x+9}{x^{2}+4x-12}[/tex]
can be rewritten as
[tex]\frac{3x+9}{(x+6)(x-2)}[/tex]
because
-2 · 6 = -12
-2 + 6 = -4
so thats why the denominator is (x+6)(x-2)
A vertical asymptote is where the denominator equals 0, so,
-6 + 6 = 0
2 + -2 = 0
So the Answer is:
B) x = -6 and x = 2
( SHOW WORK NEED IT BY TONIGHT! ) Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
Two students in Mr. Kelley's class, Tori and Cora, have been assigned a workbook to complete at their own pace. They get together at Tori's house after school to complete as many pages as they can. Tori has already completed 16 pages and will continue working at a rate of 5 pages per hour. Cora has completed 13 pages and can work at a rate of 8 pages per hour. Eventually, the two students will be working on the same page. How long will that take? How many pages will each of them have completed?
After _ hours, Tori and Cora will have each completed _ pages in their workbooks.
Answers
Answer:
1 hour with 21 pages completed for each.
Step-by-step explanation:
First you need to list out what you know.
Tori:
Finished: 16 pgs
Rate: 5 pgs per hr
Cora:
Finished: 13 pgs
Rate: 8 pgs per hr
Now we compose Equations. In an equation we put the rate with the "X" because it is a constant rate of change. The finished amount of pages is our starting point or our y intercept we write it in this format:
y=mx+b
m being the rate of change
b being the initial amount or the starting point
For Tori the equation would be 5x+16 because 5 is our rate of change since she completes 5 pages per hour and 16 is our initial amount since she already completed them.
For Cora the equation would be 8x+13 because 8 is our rate of change since she completes 8 pages per hour and 13 is our initial amount since she already completed them.
we set these equation equal to each other:
5x+16=8x+13
eliminate the 5x on one side to leave the 16 by its self which in this case we subtract 5x to each side and get :
16=3x+13
the we subtract the 13 to leave 3x by its self and subtract 13 on both sides and get :
3=3x
lastly we divide 3 on both sides to isolate x and this would be our hours until they are both working on the same page:
1=x
this gives us 1 which means in 1 hour of working, both Cora and Tori will be working on the same page.
Substitute the 1 for each equation to get the total amount of pages completed in 1 hour:
5(1)+16
5+16
21 pages for Tori
8(1)+13
8+13
21 pages for Cora
Done
In one hour both Tori and Cora will have done 21 pages
Solve the following system of equations.
3x + 2y - 5 = 0
x = y + 10
Make sure there are NO SPACES in your answer. Include a comma in your answer.
ANSWER: {(
)}
Answers
Answer:
The solution is the point (5,-5)
Step-by-step explanation:
we have
[tex]3x + 2y - 5 = 0[/tex] -----> equation A
[tex]x = y + 10[/tex] -----> equation B
Solve the system by substitution
substitute equation B in equation A
[tex]3(y+10) + 2y - 5 = 0[/tex]
solve for y
[tex]3y+30 + 2y - 5 = 0[/tex]
[tex]5y=-25[/tex]
[tex]y=-5[/tex]
Find the value of x
[tex]x=5+ 10[/tex]
[tex]x=5[/tex]
therefore
The solution is the point (5,-5)
Select the correct answer from each drop-down menu.
A 4
7
15
B 15
4
7
C 15
7
4
Answers
Answer: The correct answer is: [C]: " [tex]15^{(7/4)}[/tex] " .
____________________________________
Step-by-step explanation:
____________________________________
Note the property for square roots in exponential form:
_____________________________________
→ [tex]\sqrt[a]{(b)^ c}[/tex] ; ↔ b[tex]b^{(c/a)}[/tex] ;
{ [tex]a\neq 0[/tex] ; [tex][a^{(b/c)}]\neq 0[/tex] ; [tex]c\neq 0[/tex] .}.
_____________________________________
As such, given:
→ [tex]\sqrt[4]{(15^7)}[/tex] ;
a = 15, b = 7, c = 4 .
→ [tex]\sqrt[4]{(15^7)}[/tex] ; ↔ [tex]15^{(7/4)}[/tex] ;
→ which corresponds to:
_____________________________________
Answer choice: [C]: " [tex]15^{(7/4)}[/tex] " .
_____________________________________
Hope this helps!
Wishing you well in your academic endeavors!
_____________________________________
The scale map shows that 5 centimeters =2 kilometers.What number of centimeters on the map represents an actual distance of 5 kilometers?
Answers
Answer:
Therefore 12.5 centimeters on the map represents an actual distance of 5 kilometers.
Step-by-step explanation:
Given:
The scale map shows that
5 centimeters =2 kilometers.
To Find:
What number of centimeters on the map represents an actual distance of 5 kilometers?
Solution:
Let 'x' cm be on the map to represent 5 kilometer.
Given:
5 centimeters = 2 kilometers.
Therefore,
x cm = 5 kilometer
Soon Equality of proportion we get
[tex]\dfrac{5}{x}= \dfrac{2}{5}\\ \\x=\dfrac{5\times 5}{2}=\dfrac{25}{2}=12.5\ cm\\\\\therefore x = 12.5\ cm[/tex]
Therefore 12.5 centimeters on the map represents an actual distance of 5 kilometers.
.The sum of the digits of a two-digit number is one-fifth the value of the
number. The tens digits is one less than the ones digit. What is the two-digit
number? (Hint: Assign a different variable to the value of each digit.)
Answers
Here's how I'm assigning a different variable to the value of each digit:
10x + y, where x is the first digit, and y is the second digit (you can test if this equation works)
The sum of the digits is 1/5 the value of the number. Using the information, we can form the equation:
x + y = (1/5)(10x + y)
Simplify
x + y = 2x + (1/5)y
The tens digit is one less than the ones digit. Using this information, we can form the equation:
x = y - 1
Adding both sides by 1 gives
x + 1 = y
Substituting this into the y's the first equation gives:
x + x + 1 = 2x + (1/5)(x + 1)
Distribute and simplify
2x + 1 = 2x + (1/5)x + 1/5
Subtract both sides by 2x
1 = (1/5)x + 1/5
Subtract 1/5 from both sides
4/5 = (1/5)x
Multiply both sides by 5
4 = x
x = 4
Use this to solve for y
x + 1 = y
4 + 1 = y
y = 5
Thus, x = 4 and y = 5. The 2 digit number is XY, which is 45.
Let me know if you need any clarifications; this was a very interesting math problem to solve!
-3x+7y=5x+2y−3x+7y=5x+2yminus, 3, x, plus, 7, y, equals, 5, x, plus, 2, y
Complete the missing value in the solution to the equation.
(-5,(−5,left parenthesis, minus, 5, comma
))
Answers
Answer:
The complete missing value in the solution to the equation is (-5,-8).
Step-by-step explanation:
Consider the provided equation.
[tex]-3x+7y=5x+2y[/tex]
We need to find the missing value of the coordinate; (-5__)
To find the missing value substitute x = -5 in above equation.
[tex]-3(-5)+7y=5(-5)+2y[/tex]
[tex]15+7y=-25+2y[/tex]
[tex]7y-2y=-25-15[/tex]
[tex]5y=-40[/tex]
[tex]y=-8[/tex]
Hence, the missing value is -8.
Thus, the complete missing value in the solution to the equation is (-5,-8).
Answer:
Step-by-step explanation:
-5, -8
Evaluate f(1) using substitution:
f(x) =2x^3 -3x^2-18x+8
Answers
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Substitute 1 in everywhere you see 'x'
2(1)^3 - 3(1)^2 - 18(1) + 8
Solve:
f(1) = -11
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Final answer:
To evaluate the function f [tex](x) = 2x^3 - 3x^2 - 18x + 8[/tex] at x=1, substitute 1 for every instance of x in the function and simplify to get f(1) = -11.
Explanation:
The question appears to be a math problem where the student is asked to evaluate a function at a specific input. Specifically, the function given is [tex]f(x) = 2x^3 - 3x^2 - 18x + 8[/tex] and the student has been asked to evaluate this function when x is equal to 1. To find f(1), we replace every instance of x in the function with 1.
So, f(1) = [tex]2(1)^3 - 3(1)^2 - 18(1) + 8[/tex]= 2(1) - 3(1) - 18 + 8 = 2 - 3 - 18 + 8 = -11.
Thus, f(1) evaluates to -11.
Two equivalent fractions of 4/7
Answers
Answer:
8/14 and 12/21
Step-by-step explanation:
Just multiply numerator and denominator by the same number, e.g., 2 and 3 to get above.
Answer:
8/14 and 12/21
Step-by-step explanation:
Find the product
(-3)(8)
Answers
Answer:
-24
Step-by-step explanation:
This is a simple multiplication problem. 8 times 3 is 24, and since one of the numbers is negative, the product (answer in multiplication) will be negative.
In multiplication and division of integers (positive and negative numbers), if the numbers have the same signs, the answer is ALWAYS positive, and if the numbers have different signs, the answer is ALWAYS negative.
Answer: -24
Step-by-step explanation: To multiply (-3)(8), it is important to understand that a negative times a positive is a negative so (-3)(8) is -24.