Mathematics High School

14. What is the solution of the system?
5x - y= -7
3x - y= -2
-2.5, -5.5
-2.5, 11
5, 2.5
2.5, 5.5

Answers

Answer 1

Answer: -2.5,   -5.5

Step-by-step explanation:

5x - y= -7

3x - y= -2 multiply by -1

5x - y= -7

-3x + y= +2 we add both equations

2x=-7+2,  2x=-5,   x=5/2= -2.5

5(-2.5)-y=-7

- 12.5-y= -7 we simplify and get

-y=-7+12.5,             -y=5.5,    y=-5.5

Related Questions

Which is the solution for ln(3x - 5) = ln(11) + ln(2) ?

Answers

Answer:

B: x=9

Step-by-step explanation:

You have to use the property of logarithms

that says ln A + ln B = ln AB.  So here we have

ln (3x - 5) = ln 11 + ln 2 = ln 22

Therefore 3x - 5 = 22, from which x = 9

evaluate the expression for n=6 (your answer will be a number)
3n - 3

Answers

Answer:

15

Step-by-step explanation:

3(6) - 3 =

18 - 3 =

15

the answer should be 15

HELP ASAP !! & GIVING OUT BRANLIEST
Select the correct answer.
Maggie is training for a bicycle trip across her home state. She recorded the approximate number of miles she biked during 10 days of training. The graph shows the data that she recorded as a function of the distance biked over time.
Which function best models the data set?

Answers

Answer:

C

Step-by-step explanation:

I got it right

The function that best models the data set is y = 3x + 11

What is the slope of the line?

"The slope of the line passing through points [tex](x_1,y_1),(x_2,y_2)[/tex] is,

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]"

What is the equation of the line passing through two points?

"The equation of the line passing through points [tex](x_1,y_1),(x_2,y_2)[/tex] is, [tex]\frac{y-y_1}{y_2-y_1} =\frac{x-x_1}{x_2-x_1}[/tex] "

For given question,

If we draw the line of best fit, then the the line would pass through points (3, 20) and (8, 35)

Let [tex](x_1,y_1)=(3, 20),(x_2,y_2)=(8, 35)[/tex]

Then the equation of the line would be,

[tex]\Rightarrow \frac{y-y_1}{y_2-y_1} =\frac{x-x_1}{x_2-x_1} \\\\ \Rightarrow \frac{y-20}{35-20} =\frac{x-3}{8-3} \\\\ \Rightarrow \frac{y-20}{15} =\frac{x-3}{5} \\\\ \Rightarrow y-20=15\times \frac{x-3}{5}\\\\ \Rightarrow y-20=3(x-3)\\\\ \Rightarrow y-20=3x-9\\\\ \Rightarrow y=3x+11[/tex]

Therefore, the function that best models the data set is y = 3x + 11

Learn more about the equation of the line here:

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What is the value of x in the solution to this system of equations?
y+2x=-1
Y=2x-19​

Answers

Answer:

My teacher told be that x will mean 6 and she also said anyletter will equel 6 in an eqaution HOPE THIS HELPS :D

Step-by-step explanation:

Which of the following is not a solution to the inequality
4x + 1 ≤ 18
A. 4
B. 4.23
C. 4.25
D. 4.27

Answers

Answer: A   4

step by step explmationn

Answer:

C. 4.25

Step-by-step explanation:

You would want to subtract the one so you could subtract it to 18 then divide 4 by 17 to get 4.25

Please help me with a math question ASAP!!! Will give Brainliest

Below is a screenshot of the problem

Answers

Answer: 128

Step-by-step explanation: 3 x -2 + 70 = 64 + -2 + 70 = 128

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Find the coordinates of quadrilateral "WXY' after a dilation with the scale factor of 2.
Original coordinates:
V(6, 2), W2,4), X-3, -2), Y(3, -5), scale factor of 2
8
W
0 -86
10
12
NEED HELP ASAP

Answers

Answer:

2,1

Step-by-step explanation:

Answer: no  

Step-by-step explanation:

patty had 51 cent until she spent 5 nickles.how much money does patty have now?​

Answers

Answer:

26 cents

Step-by-step explanation:

5×5=25

51-25=26

Hello,

Let’s solve this! Nickels are worth 5¢ each, and a penny is 1¢.

Step-by-step:

Multiple the numbers

5 * 5

Subtract the total

51 - 25

Answer: 26

Hope this helps!

y=4x+7 in standerd form

Answers

Answer: Y=4x+7 in standard form is, 4x + 7y = 7

Step-by-step explanation:

Sean is buying 9/16
pound of tea at a tea shop. The cost of tea is $24 per pound.

Answers

The cost of 9/16 pounds of tea is $13.50.

How to determine the cost of 9/16 pounds of tea

In order to determine the cost of 9/16 pounds of tea, the cost of a pound of tea would be multiplied by 9/16 pounds.

Cost of 9/16 pounds of tea = 9/16 x 24

= $216/16

= $13.50

To learn more about multiplication, please check: https://brainly.com/question/3385014

How do you write 94.44% as a decimal

Answers

Answer:

Step-by-step explanation:

an idiot calls someone "idiot" LOL.

Answer:

0.9444

Step-by-step explanation:

all I've done is i took the decimal point and placed it next to the 9 and added a zero on the left side of the decimal point .i hope this helped.

the legnth of a rectangle is 4 times the width. the primiter is 120 cm. find the width and the length of the rectangle.​

Answers

perimeter rectangle = 120 cm

let width be = x
thus the length will be = 4x

4x + 4x + x + x = 120
10x = 120

thus, x = 12 cm

so , width = x = 12 cm

length = 4x = 4(12) = 48 cm

i am sorry if my answer is wrong .

What equation is a proportion?

A. 1/3 = 1/4
B. 3/4 = 6/9
C. 5/8= 20/32
D 7/9 = 21/28

Answers

Answer:

c. 5/8= 20/32

Step-by-step explanation:

because 5*4=20 and 8*4=32

Pls answer this is urgent

Answers

Answer:

9 hours

Step-by-step explanation:

12 times 9 equals 108

108 - 9 equals 99

5 times 5 times 1 times 1 times 1 times 2

Answers

Answer:

50

Step-by-step explanation:

5 x 5 = 25

25 x 1 x 1 x 1 = 25

25 x 2 = 50

hope this helps

<3

: )

Answer:

50

Step-by-step explanation:

help 6th grade math i will give brainliest

Answers

exponent: 3^5
standard form: 243

15 points please help me ???? ASAP

Answers

I think it is +0.67
I don’t know tho sorry
Have a nice day tho

ten less than four times a number is 50
the equation is -----the solution is ------

Answers

Answer:

2.5

Step-by-step explanation:

50÷4-10

50=(4x)-10

Equation:

(4*n)=50

Solution:

(4*n)-10=50

(4*n)-10-10=50-10

(4*n)=40

4*10=40

n=40

A laundry basket has 24 t-shirts in it. Four are navy, 12 are red, and the
remaining are white.

What is the probability of not selecting a white shirt?

Answers

Answer:

The probability is 1/2. Since there are 24 T-shirts in total and 12 is half of 24, the probability is 1/2.

Step-by-step explanation:

SO anyways :))))
Thanks and please make sure you comment only if you are pretty sure you are right! Thanks

Answers

Answer:

1 / 8², B

Step-by-step explanation:

8 / 8³

8³ = 8*8*8

So, the equation can also be written as:

8 / 8*8*8

divide the numerator and denominator by 8.

1 / 8*8

This is equal to:

1 / 8²

The answer is B.

help for 10 years good luck

Answers

Answer:

The answer is 8

Step-by-step explanation:

I need the good luck :)

!00 points and Brainliest plzzzz help, I will report false answers though

Answers

Answer:

4x+y=17 that the answer  

Step-by-step explanation:

Answer:

-4x-17=y

Step-by-step explanation:

Distribute the -4 into the parenthises. Then subrtract the 1 from both sides.

Natalee wanted to demonstrate the volume of a square pyramid. To do this, she took a hollowed out pyramid that has a base of 25 square inches and a height of 5 inches and filled it with water. She then dumped this water into a hollowed out cube that has a volume of 125 cubic inches. Enter the amount of times that she will need to dump the water from the pyramid into the cube to completely fill the cube

Answers

Answer:

The answer is below

Step-by-step explanation:

Natalee transferred water from a square pyramid to a cube. To calculate how many times she will need to dump the water from the pyramid into the cube to completely fill the cube, we divide the volume of the cube by the volume of the square pyramid. Hence:

Number of times = volume of cube / volume of pyramid

The perimeter of the pyramid base = 25 in, hence the length of one side of the bae = 25 / 4 = 6.25 in

Volume of square pyramid  = base² × (height / 3) = (6.25 in)² * (5 in / 3) = 65.1 in³

Volume of cube = 125 in³

Number of times = 125 in³ / 65.1 in³ = 1.92

The amount of times that she will need to dump the water from the pyramid into the cube to completely fill the cube is 1.92.

What is volume?

The capacity of a container of any shape is called the volume.

Natalee transferred water from a square pyramid to a cube. Then,

Given is the perimeter of the pyramid base = 25 in

So, the length of one side of the base b= 25 / 4 = 6.25 in

Volume of square pyramid  = b² × (h/ 3) = (6.25 in)² * (5 in / 3) = 65.1 in³

Volume of cube = 125 in³

Number of times = volume of cube / volume of pyramid

Number of times = 125 in³ / 65.1 in³ = 1.92

Learn more about volume

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Which function has an inverse that is a function?
b(x) = x2 + 3
d(x) = –9
m(x) = –7x
p(x) = |x|

Answers

Answer:

All but the second one

Step-by-step explanation:

Find the inverse of each function:

b(x)=x^2+3

y=x^2+3

x=y^2+3

x-3=y^2

sqrt(x-3)=y

This inverse function is a function

d(x)=-9

y=-9

This doesn't have an inverse function

m(x)=-7x

y=-7x

x=-7y

-1/7x=y

This inverse function is a function

p(x)=|x|

y=|x|

x=|y|

x=y

This inverse function is a function

Therefore, all but the second function have inverses that are functions

Answer:

All but the second one have inverse functions

Step-by-step explanation:

Brainliest pls pls pls pls

Which function is best represented by the graph?

Answers

The slope is negative since the line is going downwards. Y intercept: when x = 0 and looking on the graph it’s (0,-2)

Solution: B. y = -2x - 2

find the value of x
do 5 and 7

Answers

Answer:

#5 = 14.4

#6 = 8.4

Step-by-step explanation:

A recipe for chicken noodle soup calls for 1 3/4 cups of chicken broth. Peggy wants to triple the recipe. How many cups of chicken broth will she need?

Answers

Step-by-step explanation:

multiply 1 3/4 by 3

7/4×3

21/3=

5 1/4

Answer:

1. Less than 3

2. 9/4

Step-by-step explanation:

PLS HELP. Which of the following describes a way to graph the function?

Answers

Answer:

The graph of the function is the set of all points (x,y) in the plane that satisfies the equation y=f(x) y = f ( x ) . ... A vertical line includes all points with a particular x value. The y value of a point where a vertical line intersects a graph represents an output for that input x value.

poggers poggers poggers

can someone please help me!!

Answers

Answer:

The probability is

Step-by-step explanation:

11%

Pls help it’s not that hard

Answers

Answer:

what is the question

Step-by-step explanation:

???????1huhuh

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