will give BRAINEST
Use the elimination method to solve the system of equations. Choose the correct ordered pair.
Answers
2x - 5y = 2
+ -3x - 2y = 16
-x - 7y = 18
-x = 18 + 7y
x = -7y - 18
Plug "x" into either one of the equations
3(-7y-18) + 2y = -16
-21y - 54 + 2y = -16
-19y - 54 = -16
-19y = 38
y = -2
Since we have the actual value of y, we can plug that into either one of the equations to find the value of x.
3x + 2(-2) = -16
3x - 4 = -16
3x = -12
x = -4
So.. The answer for the problem is D (-4, -2).
Related Questions
How do you write 7/20 as a percentage??
Answers
In decimal form would be 0.35 .
To get the percentage move the decimal to the right 2 times .
:)
How are the values of the eights in 880 relared
Answers
the number 880 can be written as:
880 = 800 + 80 + 0
There is 3/4 of a box of cereal remaining. You eat 2/5 of the remaining cereal. What fraction of the box do you eat?
Answers
-------- = ------------- = ------
4(5) 2(5) 10
You eat 3/10 of the box's original contents
Alternatively: (3/4)(2/5) = (3/2)(1/5) = 3/10.
if measure of angle 1 and measure of angle 2 form a linear pair and measure of angle 1 is 18 degrees less than five times the measure of angle 2 what if the measure of angle 1
Answers
Linear pair angles add up to 180 degrees because they lie on a straight line.
Let x = smaller angle
Let 5x - 18 = bigger angle
x + 5x -18 = 180
6x = 198
x = 198/6
x = 33
The smaller angle is 33 degrees and the bigger is 147 degrees
What is 26.99 round to the nearest tenth
Answers
What is 26.99 round to the nearest tenth?
To round to the nearest tenth, you need know whether the number next to tenth place is greater than 5 or lesser than 5. If its greater than 5, you need to round up. If its lesser than 5, you need to round down. Now, in the number 26.99 9 is in the tenth place. The number next to 9 is greater than 5, so just add on to the ones place, making the tenth and hundredth place 0. Zero has no value so whether you add the zero or not, it does not matter.
26.99 round to the nearest tenth ≈ 27.
Hope I helped (:
Have a great day!
Which polygon appears to be regular? Figure A Figure B Figure C Figure D Figure A is a hexagon with varying lengths. Figure B is a pentagon. Figure C is a right triangle. Figure D is a rectangle.
Answers
B has to be the answer because the others are not.
Not C because a right triangle is not regular, i.e. and equilateral triangle.
Not D because a rectangle has different side lengths.
Answer:
Figure B appears to be a polygon under certain conditions.
Step-by-step explanation:
We are given the following information in the question:
Figure A is a hexagon with varying lengths.
Figure B is a pentagon.
Figure C is a right triangle.
Figure D is a rectangle.
We have to find which are the regular polygons.
A regular polygon is a polygon with all the sides equal and all the interior angles have equal measure.That is a regular polygon is equiangular and equilateral.Figure A is not regular because of varying length.
Figure B can be a regular pentagon provided it is equiangular and equilateral
Figure C cannot be a regular polygon because a right angle follows the Pythagoras theorem and all the three sides can never be equal in a right angled triangle.
Figure D cannot be a regular polygon as the length of only opposite sides are equal and not all sides are not equal.
Figure B appears to be a polygon under certain conditions.
What is 36 divided by 3/4?
Answers
Explanation: 36 divided by 3/4
36 4 144
____ x ____ = ____ = 48
1 3 3
^
Flip the denominator to numerator
And numerator to denominator
Also divide 144/3
What is the vertex of the graph of y+2x+3 = -(x+2)^2 + 1?
A. (-3,-33)
B. (-3,3)
C. (3,-24)
D. (3,21)
Answers
The graph opens downward too
Slope formula question (Algebra 2)
Answers
The difference between two positive integers is 4. If the smaller is added to the square of the larger, the sum is 68. Find the integers.
Answers
Two positive integers x and y
x - y = 4
x² + y = 68
Findx and y
SolutionAdd the two equations together.
... (x - y) + (x² + y) = (4) + (68)
... x² + x = 72
Rearrange to standard form and factor.
... x² + x - 72 = 0
... (x + 9)(x - 8) = 0
Use the zero product rule to find the solutions. That rule says the product is zero when one or more factors is zero.
... x + 9 = 0 ⇒ x = -9
... x - 8 = 0 ⇒ x = 8 . . . . . . the positive solution
Then we can find y from
... 8 - y = 4
... y = 4 . . . . . . . add y-4 to the equation
The two positive integers are 8 and 4.
To solve for the two positive integers where their difference is 4 and the sum of the smaller and the square of the larger is 68, we set up a quadratic equation and solve for n to find that the integers are 4 and 8.
Explanation:The problem given is a classic algebra question where we are asked to determine two positive integers based on their relationship to each other and an additional numeric condition. We know that the difference between these two numbers is 4, and when the smaller integer is added to the square of the larger, the result is 68.
Let's denote the smaller number as n and the larger number as n+4, since there is a difference of 4 between them. Now, according to the second condition given, we can set up the following equation: n + (n+4)2 = 68.
Expanding the squared term and combining like terms, we get a quadratic equation: n2 + 8n + 16 + n = 68. Simplifying, n2 + 9n + 16 = 68. Further simplification leads to n2 + 9n - 52 = 0. Factoring this quadratic equation, we find the integers that satisfy the equation: n = 4 and n = -13. Since we are looking for positive integers, the solution is n = 4 and n+4 = 8.
Therefore, the two positive integers are 4 and 8.
what is 28.5 divided by 5
Answers
A kite flying in the air has a 12 ft line attached to it. Its line is pulled taut and casts an
11 ft shadow. Find the height of the kite. If necessary, round your answer to the nearest tenth.
Answers
h^2 + 10^2 = 12^2
h^2 + 100 = 144
h^2 = 44
h = √44 = appr 6.6
I need help I am trying to find ft
Answers
1 foot = 12 inches
divide 69 by 12
69/12 = 5.75 feet
The length of a table is 6 feet. On a scale drawing, the length is 2 inches. Write three possible scales for the drawing
Answers
Answer:
The three possible scales for the drawing are 1 inch : 3 feet, 1 inch : 36 inch and 1 inch : 91.44 cm.
Step-by-step explanation:
It is given that the length of a table is 6 feet. On a scale drawing, the length is 2 inches.
The scale for drawing is
[tex]Scale=\frac{\text{Length in drawing}}{\text{Actual length}}=\text{Length in drawing}:\text{Actual length}[/tex]
First possible scale for the drawing is
2 inch : 6 feet
It can be written as
1 inch : 3 feet
We know that 1 feet = 12 in
1 inch : 36 inch
We know that 1 feet = 30.48 cm
1 inch : 91.44 cm
Therefore the three possible scales for the drawing are 1 inch : 3 feet, 1 inch : 36 inch and 1 inch : 91.44 cm.
The three possible scales for the drawing are 1 inch : 3 feet, 1 inch : 36 inch and 1 inch : 91.44 cm.
Here, we have,
It is given that the length of a table is 6 feet. On a scale drawing, the length is 2 inches.
The scale for drawing is
scale = length in drawn/actual length
scale = length in drawn : actual length
First possible scale for the drawing is
2 inch : 6 feet
It can be written as
1 inch : 3 feet
We know that 1 feet = 12 in
1 inch : 36 inch
We know that 1 feet = 30.48 cm
1 inch : 91.44 cm
Therefore the three possible scales for the drawing are 1 inch : 3 feet, 1 inch : 36 inch and 1 inch : 91.44 cm.
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Trapezoid W ′ X ′ Y ′ Z ′ is the image of trapezoid WXYZ under a dilation through point C. What scale factor was used in the dilation?
− 7/3
− 3/7
3/7
7/3
Answers
Bill gates makes approximately $12 billion a year. On average, how much does he make per minute
Answers
Bill Gates makes approximately $22,831.05 per minute, calculated by dividing his annual earnings of $12 billion by the number of minutes in a year (525,600).
Explanation:To calculate how much Bill Gates makes per minute, we need to start by determining how much he makes per year. According to the question, Bill Gates makes approximately $12 billion a year. To find out how much that is per minute, we need to follow these steps:
Therefore, on average, Bill Gates makes $22,831.05 per minute.
A factory makes an oil mixture by mixing oils of grades A and B as follows. For every 2.3 liters of grade A oil, 1.2 liters of grade B oil are mixed in. How many liters of grade A oil and grade B oil will the factory need to make 1000 liters of their oil mixture? Explain your solution.
Answers
Since we don't know the scaling factor, we assign that multiple "x". Then the amounts of each ingredient oil would be:
amount of A = 2.3x
amount of B = 1.2x
add them together to get the required mixture amount.
1000 = 2.3x + 1.2x
1000 = 3.5x
1000/3.5 = x
285.7 = x
this is the scaling factor.
plug x in to find the amounts of each oil type.
A = 2.3(285.7)
A = 657.1 L
B = 1.2(285.7)
B = 342.9 L
the point (1,1) is the image under the image under rhe translation (x,y) (x+3,y-3)
Answers
The pre-image of the point (1, 1) under the translation (x, y) -> (x+3, y-3) in a coordinate system is the point (-2, 4).
The student's question relates to a translation transformation in mathematics. A translation moves every point of a figure or a space by the same distance in a given direction. In this case, the student has provided a specific translation transformation, which is represented by the formula (x, y)
ightarrow (x+3, y-3). This transformation means that for any point with coordinates (x, y), the translated point will have coordinates where 3 is added to the x-coordinate and 3 is subtracted from the y-coordinate.
If the point (1,1) is an image under this translation, you can find its pre-image by reversing the translation. Thus, subtracting 3 from the x-coordinate of the image and adding 3 to the y-coordinate of the image gives the pre-image coordinates:
Pre-image x-coordinate: 1 - 3 = -2Pre-image y-coordinate: 1 + 3 = 4Therefore, the pre-image of the point (1, 1) under the given translation is (-2, 4).
Round 754 to the nearest ten
Answers
pre cal/cal master needed
g(x)={ ax-3, x<-2
{ x^2 -2x, x>-2
What value would the function g(x) have point discon. at x=-2 how to find?
Answers
Ok so we want to find what value of a would the function g(x) have point discontinuity at x=-2.
We find this by subsituting -2 where the x is located in the functions x^2 -2x
x^2 -2x
-2^2 - 2(-2) = 8
Now to find a we use ax - 3 and insert -2 for x like the follow
-2a - 3
Next for the limit to exist both limits have to equal the same so we have
-2a - 3 = 8
Now solve for a
-2a - 3 = 8
-2a - 3 + 3 = 8+3
-2a = 11
-2a / -2 = 11 / -2
a = -5.5
So when a is at -5.5 the function is continuous and anything > or < will make it discontinuous. So when -5.5 < a < -5.5 a will have discontinuity.
how many integers from 1 to 700 are divisible by 2, 5 and 7
Answers
There are 10 integers from 1 to 700 that are divisible by 2, 5, and 7. This is calculated by finding the least common multiple (LCM) of the numbers, which is 70, and then determining how many multiples of 70 are within the given range.
Explanation:The question asks to find out how many integers from 1 to 700 are divisible by 2, 5, and 7. An integer divisible by 2, 5, and 7 is also divisible by their least common multiple (LCM). The LCM of 2, 5, and 7 is 70 since 2 x 5 x 7 = 70. So, the task is to find the number of multiples of 70 between 1 and 700.
To find the number of multiples of 70 in that range, you can use the following steps:
Divide the largest number in the range (700) by 70 to find the highest multiple within the range. ∑(700 ÷ 70 = 10).Since we started from 1 and 70 is the first multiple, the total count is the result of the division.Therefore, there are 10 integers from 1 to 700 that are divisible by 2, 5, and 7.
On monday Mia spent 4 1/2 hrs. studying . on tuesday she spent another 2 4/5 hrs. studying what is the combined time she spent studying
Answers
4 + 2 = 6
1/2 + 4/5 = 5/10 + 8/10 = 13/10 = 1 3/10
6 + 1 3/10 =
7 3/10 <===
What is n in a(n-5)+6=bn.(You can use variables in the answer). Please explain, if you can.
Answers
use dis. property for left
an-a5+6=bn
isolate n.
(an-a5+6)/ b= n is the asnwer
Give A={a,b,c},how many subsets does A have including 0?
Answers
----------------------------------------------------------------------
----------------------------------------------------------------------
There are n = 3 elements in the given set, so there are 2^n = 2^3 = 2*2*2 = 8 subsets. Those 8 subsets are listed below
{a,b,c}
{a,b}, {a,c}, {b, c}
{a}, {b}, {c}
{ }
The first row is the original set. Any set is a subset of itself.
The second row represents subsets with exactly 2 elements.
The third row represents subsets with exactly 1 element
The fourth row is the empty set which can be written as [tex]\varnothing[/tex]
what is 25.6 divided by 0.5 =
Answers
I hope this helps you alot. God Bless you.
The following data pairs represent the average temperature x (in degrees Fahrenheit) and electricity costs y (in dollars) for different homes: (65, 147), (59, 141), (71, 176), (78, 189), (82, 183), (85, 211), (88, 231), (91, 227), (84, 198), (79, 188), (63, 152), (59, 126) Which of the following values is most likely the closest to the correlation coefficient of the data?
Answers
The correlation coefficient of the given data pairs is most likely closest to 0.8694.
Explanation:The correlation coefficient measures the strength and direction of the relationship between two variables. To find the correlation coefficient, you can use the formula:
r = [n(Σxy) - (Σx)(Σy)] / sqrt{[n(Σx^2) - (Σx)^2][n(Σy^2) - (Σy)^2]}
Using this formula, you can calculate the correlation coefficient for the given data pairs. The closest value to the correlation coefficient will be 0.8694, option d.
The answer closest to the correlation coefficient of the data is 0.835.
To find the correlation coefficient of the given data pairs, we can use the formula:
r = (Σxy - (Σx)(Σy)/n) / sqrt((Σx^2 - (Σx)^2/n)(Σy^2 - (Σy)^2/n))
where Σ represents the sum, n is the number of data pairs, x is the average temperature, y is the electricity cost, and xy is the product of x and y.
To calculate the correlation coefficient, we first need to find the sums and products of the data pairs:
Σx = 65 + 59 + 71 + 78 + 82 + 85 + 88 + 91 + 84 + 79 + 63 + 59 = 924
Σy = 147 + 141 + 176 + 189 + 183 + 211 + 231 + 227 + 198 + 188 + 152 + 126 = 2259
Σxy = (65*147) + (59*141) + (71*176) + (78*189) + (82*183) + (85*211) + (88*231) + (91*227) + (84*198) + (79*188) + (63*152) + (59*126) = 219907
Using these values, we can calculate the correlation coefficient:
r = (219907 - (924*2259)/12) / sqrt((Σx^2 - (Σx)^2/12)(Σy^2 - (Σy)^2/12))
Calculating the remaining sums:
Σx^2 = (65^2) + (59^2) + (71^2) + (78^2) + (82^2) + (85^2) + (88^2) + (91^2) + (84^2) + (79^2) + (63^2) + (59^2) = 73482
Σy^2 = (147^2) + (141^2) + (176^2) + (189^2) + (183^2) + (211^2) + (231^2) + (227^2) + (198^2) + (188^2) + (152^2) + (126^2) = 827259
Plugging in the values:
r = (219907 - (924*2259)/12) / sqrt((73482 - (924^2)/12)(827259 - (2259^2)/12))
After performing the calculations, the correlation coefficient is approximately 0.835.
Therefore, the answer closest to the correlation coefficient of the data is 0.835.
1-4. I need help. First answer will get brainyest.
Answers
2: Again, since bisects means cuts in half, then you would multiply 6 3/4 by two (because it's one of the halves this time) and you would get 13 1/2.
3: Do the same thing as before. It's the same thing as before. It's 9.
4: This one's the same concept as 1. Split it in half. 7.4.
8x__=2
10x__= 5
—
2
6x__= 3
—
2
?? Can you fill in the blanks?
Answers
1/2
1/2
I could only understand 1, 2, & 5
find the value of 48 - 32 ÷ 4 · 2
Answers
48−32÷4×2
=48−32×24
=48−8×2 or 48−644
=48−16
=32
Answer:
32
Step-by-step explanation:
We have been given an expression [tex]48-32\div 4\cdot 2[/tex]. We are asked to find the value of our given expression.
Using order of operations (PEMDAS), we will divide or multiply from left to right.
Dividing 32 by 4:
[tex]48-8\cdot 2[/tex]
Multiplying 8 by 2:
[tex]48-16[/tex]
[tex]32[/tex]
Therefore, the value of our given expression is 32.
Find the quadratic function that is the best fit for f(x) defined by the table below
Answers
We have to calculate a, b and c from the given table
1st Calculate c:
for x = o, y = -1.55
- 1.55 = a(0)² + b(0) + c → then c = -1.55
and the equation becomes: y = ax² + b.x - 1.55
2nd Calculate a and b:
for x = 2 , y = 17.29
17.29 =a(2)² + b(2) - 1.55 → 4a + 2b - 1.55 = 17.29 or 4a + 2b = 18.84 (1)
for x = 4 , y = 54.93
54.93=a(4)² + b(4) - 1.55 → 16a + 4b - 1.55 = 54.93 or 16a + 4b = 56.48 (2)
Now solve the system of 2 equations:
4a + 2b = 18.84 (1)
16a + 4b = 56.48 (2)
And you will find :
a= 2.35 and b = 4.72 . And the final equation is:
y = 2.35.x² + 4.72x - 1.55
The quadratic equation defined by the table is f(x) = 2.35x^2 + 4.72x -1.55
How to determine the function?A quadratic function is represented as:
f(x) = ax^2 + bx + c
Using the table of values, we have:
a(0)^2 + b(0) + c = -1.55
This gives
c = -1.55
Also, we have:
a(2)^2 + b(2) + c = 17.29
4a + 2b -1.55 = 17.29
This gives
4a + 2b = 18.84
Divide through by 2
2a + b = 9.42 --- (2)
Also, we have:
a(4)^2 + b(4) + c = 54.93
16a + 4b -1.55 = 54.93
This gives
16a + 4b = 56.48
Divide through by 4
4a + b = 14.12 ---- (3)
Subtract (2) from (3)
2a = 4.7
Divide by 2
a = 2.35
Substitute a = 2.35 in 4a + b = 14.12
4*2.35 + b = 14.12
Evaluate
b = 4.72
Substitute values for a, b and c in f(x) = ax^2 + bx + c
f(x) = 2.35x^2 + 4.72x -1.55
Hence, the quadratic equation defined by the table is f(x) = 2.35x^2 + 4.72x -1.55
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