Choose the system of equations which matches the following graph:
A. 5x - y = 7
2x - y = 0
B. 5x - y = 7
2x + y = 0
C. 5x + y = -7
2x + y = 0
D. 5x + y = -7
2x - y = 0
Answers
Answer:
Option B : [tex]5x - y = 7[/tex]
[tex]2x + y = 0[/tex]
Step-by-step explanation:
Intersecting point on the graph = (1,-2)
Substitute this point in the given options .
A. [tex]5x - y = 7[/tex]
[tex]2x - y = 0[/tex]
Substitute (1,-2)
[tex]5(1) - (-2) = 7[/tex] and [tex]2(1) -(-2) = 0[/tex]
[tex]7 = 7[/tex] and [tex]4 \neq 0[/tex]
So, this system of equations does not matches the graph.
B. [tex]5x - y = 7[/tex]
[tex]2x + y = 0[/tex]
Substitute (1,-2)
[tex]5(1) - (-2) = 7[/tex] and [tex]2(1)+(-2) = 0[/tex]
[tex]7 = 7[/tex] and [tex]0= 0[/tex]
So, this system of equations matches the graph.
C.[tex]5x + y = -7[/tex]
[tex]2x + y = 0[/tex]
Substitute (1,-2)
[tex]5(1) - (-2) = -7[/tex] and [tex]2(1)+(-2) = 0[/tex]
[tex]7\neq -7[/tex] and [tex]0= 0[/tex]
So, this system of equations does not matches the graph.
D. [tex]5x + y = -7[/tex]
[tex]2x - y = 0[/tex]
Substitute (1,-2)
[tex]5(1) - (-2) = -7[/tex] and [tex]2(1) -(-2) = 0[/tex]
[tex]7\neq -7[/tex] and [tex]4 \neq 0[/tex]
So, this system of equations does not matches the graph.
Answer:
B. 5x - y = 7
2x + y = 0
Step-by-step explanation:
took test
Related Questions
Multiply (4+I)(1-5i)
Answers
(4 + i)(1 - 5i)
4 - 20i + i - 5i^2
4 - 19i + 5
9 - 19i
Answer:
9 - 19i
Step-by-step explanation:
I REALY NEED HELP!
In kite ABCD, m∠ACD=82°. What is m∠DCE?
1.)41°
2.)82°
3.)90°
4.)98°
Answers
Answer:
(A)41°.
Step-by-step explanation:
We know that in Kite, the diagonals are the angle bisectors, therefore
In Kite ABCD, m∠ACD=82°, thus
[tex]m{\angle}DCE=\frac{1}{2}m{\angle}ACD[/tex]
Substituting the given value, we have
⇒[tex]m{\angle}DCE=\frac{1}{2}(82^{\circ})[/tex]
⇒[tex]m{\angle}DCE=41^{\circ}[/tex]
Therefore, the measure of m∠DCE is 41°.
Hence, option A is correct.
Margie calculated that she would spend $175 on school supplies this year. She actually spent $97.50 on school supplies. What is Margie’s percent of error? 77.3% 79.5% 44.2% 4.4%
Answers
77.5 / 97.5 = 0.7948 = 79.5%
answer
79.5%
Margie’s percent of error is 79.5%.
First step is to calculate the amount that Margie was off by
Amount=$175 - $97.50
Amount=$77.5
Second step is to find Margie percent of error
Percent of error=77.5 / 97.50× 100
Percent of error = 79.48717949%
Percent of error=79.5% (Approximately)
Inconclusion Margie’s percent of error is 79.5%.
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which of the following is an example of a common topic.
A) anyone can be brave.
B) freedom takes sacrifice.
C) the box was broken.
D) bravery.
Answers
Answer:
D. Bravery
Step-by-step explanation:
Bravery is a general topic.
A machine factory produces 2 parts per second. One shift is 10 hours long. What is the production rate in parts per shift?
Answers
60 seconds per minute
2 x 60 = 120 parts per minute
60 minutes per hour
120*60 = 7200 parts per hour
7200 x 10 hours = 72,000 parts per 10 hour shift
How long is a football field
Answers
the distance between goal lines is 100 yards, each end zone is 10 yards
so total length of a football field is 120 yards
Alina spent no more than $45 on gas for a road trip. The first gas station she used charged $3.50 per gallon and the second gas station charged $4.00 per gallon. Which inequality relates the number of gallons of gas she bought at the first station, x, the number of gallons of gas she bought at the second station, y, and the total amount she paid? What are the possible values of y?
Answers
A)3.5x + 4y ≥ 45, y ≥ 11.25
B)3.5x + 4y ≥ 45, 0 ≤ y ≤ 10.375
C)3.5x + 4y ≤ 45, 0 ≤ y ≤ 11.25
D)3.5x + 4y ≤ 45, y ≥ 10.375
Answers
Answer:
Option C is correct.
Step-by-step explanation:
Alina spent no more than $45 on gas for a road trip.
Let gallons bought at first station be = x
Let gallons bought at the second station be = y
The first gas station she used charged $3.50 per gallon and the second gas station charged $4.00 per gallon.
Equations become: 3.50x and 4y
Total money spent on gas is no more than $45.
So, complete equation is given as:
[tex]3.50x+4y \leq 45[/tex]
To know the possible value of y let us assume she bought all the gas from second station.
[tex]4y\leq 45[/tex]
[tex]y\leq 11.25[/tex]
As the number of gallons can not negative, range is:
[tex]0\leq y\leq 11.25[/tex]
Therefore, option C is correct.
3(x+1)-[2(3-2x)-3(3-x)]
Answers
3x+3-2-3x+9
Combine like terms
0x+3-2+9
X=10
What are the fractions of 48
Answers
(14y) exponent of 4 simplify plz help
Answers
A regulation soccer goal net is 24 ft wide by 8 ft high. A soccer net for children is 6 ft wide. If the manufacturer wishes to keep the children's soccer net to scale, how tall should the children's net be? What is the scale factor? (round answer to two decimal places)
Answers
To maintain the scale of a children's soccer net to that of a regulation net, the height should be 2 feet, given that the child-size net is 6 feet wide. The scale factor used is 0.25.
Explanation:The question asks us to find the scaled dimensions for a children's soccer net based on the dimensions of a regulation soccer goal net. The original dimensions are 24 ft in width and 8 ft in height. If a children's soccer net is 6 ft wide and we want to keep the same scale, we need to calculate the height of the net in proportion to the regulation net's dimensions.
Height Calculation:
The scale factor is the ratio of the width of the children's net to the width of the regulation net. To find the height of the children's net, we multiply the height of the regulation net by the scale factor:
Scale Factor = Width of Children's Net / Width of Regulation Net
Scale Factor = 6 ft / 24 ft = 0.25
Height of Children's Net = Scale Factor × Height of Regulation Net
Height of Children's Net = 0.25 × 8 ft = 2 ft
Therefore, to maintain the scale, the height of the children's soccer net should be 2 feet, and the scale factor is 0.25.
What is 14/28 in simplest form?
Answers
The GCM of 14 and 28 is 7. 7 goes into 14 2 times, and goes into 28 4 times. So...
2/4
Which can be simplified further to 1/2
The answer is 1/2
Hope this helps! :)
Tickets to a concert cost 2$ for children and 5$ for adults. If 630 people attended the concert and ticket sales totaled 2,910$, how many children attended the concert
Answers
80 childrens tickets and 550 adults tickets were sold.
c= children
a= adults
c+a = 630
c=630-a
2c + 5a = 2910
2(630-a) +5a=2910
1260-2a+5a=2910
1260+3a=2910
3a=1650
a = 1650/3=550
550 adult tickets
630-550 = 80 children's tickets
check:
550*5 = 2750
80*2=160
2750+160=2910
The solution to the system of equation below is (−2, −1).
2x − 3y = −1
11x − 9y = −13
When the first equation is multiplied by −3, the sum of the two equations is equivalent to 5x = −10.
Which system of equations will also have a solution of (−2, −1)?
5x = −10
11x − 9y = −13
2x + 9y = −1
11x − 9y = −13
−6x + 9y = −1
11x − 9y = −13
−6x + 3y = −1
5x = −10
Answers
11x-9y=-13
5x(-2)=-10
11x(-2)-9x(-1)=-13
Answer:
The correct option is 1.
Step-by-step explanation:
If a system of equation have solution (a,b), then the equations of system must be satisfied by the point (a,b).
It is given that the system of have solution (-2,-1), so the equations of system must be satisfied by the point (-2,-1).
The system of equation in option 1 is
[tex]5x=-10[/tex]
[tex]11x-9y=-13[/tex]
Put (-2,-1) in the above equations.
[tex]5(-2)=-10\Rightarrow -10=-10[/tex]
[tex]11(-2)-9(-1)=-13\Rightarrow -13=-13[/tex]
Since left hand side is equal to right hand side, therefore the point (-2,-1) satisfy the equations and (-2,-1) is the solution of the given system.
Similarly check the other system of equations, whether the point (-2,-1) stratify the equations or not.
In option 2,
[tex]2x+9y=-1[/tex]
[tex]2(-2)+9(-1)=-1\Rightarrow -13=-1[/tex]
Since left hand side is not equal to right hand side, therefore the point (-2,-1) is not the solution of this system of equation.
In option 3,
[tex]-6x+9y=-1[/tex]
[tex]-6(-2)+9(-1)=-1\Rightarrow 3=-1[/tex]
Since left hand side is not equal to right hand side, therefore the point (-2,-1) is not the solution of this system of equation.
In option 4,
[tex]-6x+3y=-1[/tex]
[tex]-6(-2)+3(-1)=-1\Rightarrow 9=-1[/tex]
Since left hand side is not equal to right hand side, therefore the point (-2,-1) is not the solution of this system of equation.
Only option 1 is correct.
What is the midpoint of the line segment with endpoints (1,6) and (-3,4)?
Answers
hope this helps:)
please mark thanks and brainliest:)
add 6 and 4 and divide the answer by 2 and you will get the answer for y-axis.
therefore,
midpoint = ( (1 + -3) ÷ 2 , (6+4) ÷ 2 )
= ( -2 ÷ 2 , 10 ÷ 2 )
= (-1, 5)
Which of the fractions shown has the greatest value?
2/4
4/7
1/3
4/9
Answers
1/2= .5
1/3=.33
4/9 = .44
Answer:
4/7 has the greatest value; it is .57
Step-by-step explanation:
is 113,724 divisible by 3,5,6,or9
Answers
The answers would be 3, 6, and 9.
If a scale model of a building is 5 inches wide by 7inches long. if the scale is 1 in.:15ft,how long is the building?
Answers
If a scale model of a building is 5 inches wide by 7inches long then the real-life length of the building is 105 feet.
What is Unit of Measurement?A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
If the scale of the model is 1 inch : 15 feet, this means that every inch on the model represents 15 feet in real life.
The model is 5 inches wide by 7 inches long.
Let's use the length dimension to find the real-life length of the building:
7 inches on the model represents 7 x 15 = 105 feet in real life.
Therefore, the real-life length of the building is 105 feet.
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Solve x3 = 1 over 8.
Answers
x=(1/8)^(1/3)
x=1/2
Answer:
The simplified form of the provided equation is 1/2.
Step-by-step explanation:
Consider the provided equation.
[tex]x^3=\frac{1}{8}[/tex]
8 can be written as 2³
1 can be written as 1³
Therefore the provided equation can be written as:
[tex]x^3=\frac{1^3}{2^3}[/tex]
[tex]x^3=(\frac{1}{2})^3[/tex]
[tex]x=\frac{1}{2}[/tex]
Hence, the simplified form of the provided equation is 1/2.
sharon and anthony dropped a stone from a 150-foot cliff. find the time, t, in seconds that it will take for the stone to reach the ground. let t=1/4 square root of s, where s represents the distance in feet the stone will fall.
Answers
(s = 150ft
t = 1/4 square root of s)
Square Root (150) = 12.2474487139
12.2474487139 ÷ 4 = 3.0618621785 = ~3.062
Final Answer: About 3.062 seconds.
the radius of the circle is πcm. the base of the triangle is πcm . the area of the circle equals the area of the triangle. what is the height of the triangle
Answers
π(π)^2= π^3
Area pf triangle: Bh/2
πh/2
π^3= πh/2
Multiply both sides by 2
2π^3= πh
Divide both sides by π
2π^2=h
Final answer: height= 2π^2
π*radius^2
Since we know that radius=π, we can rephrase the formula to this:
π*π^2
Follow BEDMAS to solve
π*9.8696044
=31.0062767
The area of the circle is 31.0062767 centimeters.
To find the height of the triangle using the information we have gathered, we can create an equation.
The formula to find the area of a triangle is:
base*height/2
Lets input the information we know:
π*h/2=31.0062767
Solve for h
(π*h/2)*(2) =(31.0062767)*(2)
π*h=(31.0062767)*(2)
π*h=62.0125534
(π*h)/(π)=(62.0125534)/(π)
h=(62.0125534)/(π)
h=19.7392088
The height of the triangle would be 19.7392088 centimeters.
Hope this helps!
-Benjamin
scientific notation of 19 hundred thousandths
Answers
1.9×〖10〗^(-4)
Explanation
A number is said to written in scientific notation when it is in the form A×〖10〗^n, where 1≤A<10 and n is an integer.
In this case,
19 hundred thousandths =19/100,000=0.00019
0.00019=1.9×〖10〗^(-4)
19 hundred thousandths to scientific notation = 1.9×〖10〗^(-4)
Final answer:
The scientific notation of 19 hundred thousandths (0.0019) is 1.9 × 10⁻³, accomplished by moving the decimal point three places to the right.
Explanation:
The scientific notation of the number 19 hundred thousandths, which is written as 0.0019 in decimal form, involves expressing it as the product of a number between 1 and 10 and a power of 10. To convert to scientific notation, we must move the decimal point three places to the right, which will change the number to 1.9. Since we moved the decimal point to the right, the exponent will be negative. Therefore, 0.0019 in scientific notation is 1.9 × 10⁻³.
What is tan 45 degrees
Answers
Tan 45* = one
If this helps please give brainliest ;)
Answer:
tan 45°= 1
Step-by-step explanation:
you find the opposite/adjacent= 1
Which undefined term is needed to define a circle
Answers
Answer:
the first one is "point" and the second is "1/2"
Step-by-step explanation:
Triangle XYZ is reflected across the line y=x and X'= (2, -15). What are the coordinates of X,?
Answers
Answer: (-15,2)
Answer:
the answer to this is A
Step-by-step explanation:
The graph shows the height, y, in centimeters, of a plant after a certain number of weeks, x. Shania drew the line of best fit on the graph.
A graph titled Plant Height shows Number of Weeks on x axis and Height of Plant in cm on y axis. The scales on both x and y axes are shown from 0 to 5 at increments of 5. The graph shows dots at the ordered pairs 0, 1 and 0.5, 1.2 and 1, 1.4 and 1.5, 2 and 2, 2.4 and 2.5, 2.7 and 3, 3 and 3.5, 3.3 and 4, 3.5 and 4.5, 3.8 and 5, 4. A straight line joins the ordered pairs 0, 1 and 5, 4
What would most likely be the approximate height of the plant after 7 weeks?
5.2 centimeters
7.6 centimeters
8.7 centimeters
12.7 centimeters
Answers
y = 1.2792x - 0.1665
y = 1.2792 (7) - 0.1665
y = 8.78 centimeters.
The most likely approximate height of the plant after 7 weeks is 8.7 centimeters.
Answer:
5.2 cm.
Step-by-step explanation:
Given :
Number of Weeks(x) Height of Plant (y)
0 1
0.5 1.2
1 1.4
1.5 2
2 2.4
2.5 2.7
3 3
3.5 3.3
4 3.5
4.5 3.8
5 4
We are given that A straight line joins the ordered pairs 0, 1 and 5, 4
So, we will find the equation of line using two point slope form:
[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]
[tex](x_1,y_1)=(0,1)[/tex]
[tex](x_2,y_2)=(5,4)[/tex]
Substitute the values in the formula
[tex]y-1=\frac{4-1}{5-0}(x-0)[/tex]
[tex]y-1=\frac{3}{5}(x)[/tex] ---A
Now we are supposed to find e the approximate height of the plant after 7 weeks.
Substitute x = 7 in A
[tex]y-1=\frac{3}{5}(7)[/tex]
[tex]y=\frac{3}{5}(7)+1[/tex]
[tex]y=5.2[/tex]
Hence the approximate height of the plant after 7 weeks is 5.2 cm.
Tommy and Zach are starting out at the same position. Tommy runs north at 3 miles per hour and Zach starts to run east 2 hours later at the rate of 4 miles per hour. How long until Tommy and Zach are 8 miles apart?
Answers
T=3t
Then Zach starts running two hours later at 4mph and his position can be expressed as:
Z=4(t-2)=4t-8
The distance between Tommy and Zach can be expressed as the hypotenuse length of a right triangle with the distances for Tommy and Zach being the lengths of the sides...
d^2=T^2+Z^2
d^2=(3t)^2+(4t-8)^2
d^2=9t^2+16t^2-64t+64
d^2=25t^2-64t+64, and we want to know when they are 8 miles apart
25t^2-64t+64=8^2
25t^2-64t+64=64
25t^2-64t=0
25t(t-2.56)=0
So 2.56 hours after Tommy started running they will be 8 miles apart.
To be clear though, this is the time Tommy spent running, or the time that elapsed since Tommy started running. Zach has only been running for 0.56 hours. So if they are looking for the time Zach ran it is 0.56 not 2.56 hours.
Zach=2 hours Tommy= 3 1/2 hours
How much is 1 foot line of quarters worth
Answers
a quarter is 1.75 mm thick
1 mm = 0.0393701 inches
0.0393701/12 = 25.4 mm per inch
25.4/1.75 = 14.5 quarters per inch
14.5 x 12 = 174 quarters per foot
174 x 0.25 = 43.50
$43.50 for a foot of quarters
i need help on this math problem
Answers
10+11+12+12+14+15+15+15=104
104/8=13
Final answer: 13
Evaluate the following expression.
5-3
Answers
subtract 5-3 = 2
check 2+3 =5