Solve the system of linear equations.

−x+2y=7
x−2y=7

Answer:

25

Step-by-step explanation:

Answer:

Step-by-step explanation:

I just did this question and this was the answer that was right for me. Sorry that I saw this question late :(

Answer:

the image is not clear can you send another one

Step-by-step explanation:

My favorite subject is Math, my favorite animal is a dog, and my favorite color is blue.

Answer:

My favorite subject is biology, my favorite animal is a quokka, and my fav color is pink :)

Step-by-step explanation:

Answer:

The three expressions that have the same value is A, C, and D

Answer:

What do you need help with

Step-by-step explanation:

I can do math and spanish

Answer:

There is a 3/7 chance for a gray kitten, a 4/7 chance for a male kitten, and a 1/7 chance for a gray male kitten.

Step-by-step explanation:

Total Kittens = 7 (each of the following will be out of the total amount of kittens)

2/7 = Gray Female

1/7 = Gray Male

1/7 = Black Female

3/7 = Black Male

Total Male Kittens = 4/7

Total Gray Kittens = 3/7

Answer:

the answer is 32

Step-by-step explanation:

mark me as brainliest and follow me

Answer:

x=5

Step-by-step explanation:

[tex]4x^2-11=89[/tex]

add 11 to both sides

[tex]4x^2=100[/tex]

Divide 4 on both sides

[tex]x^2=25[/tex]

Take the square root of both sides to eliminate the power of two from x

[tex]\sqrt{x^2} =\sqrt{25}[/tex]

Simplify

[tex]x=5[/tex]

Answer:163 bpm

Step-by-step explanation:

The running heart rate of a girl as per linear equation will be 178.7 bpm.

Linear equation is an equation where the highest power of a variable is 1.

As per given data,

The average walking heart rate of eight girls is = (66 + 72 + 74 + 78 + 80 + 84 + 86 + 88)/ 8 = 78.5 bpm.

The average running heart rate of eight girls is = (128 + 136 + 134 + 138 + 142 + 144 + 14 8 + 152)/8 = 1122/8 = 140.25 bpm.

Therefore, for walking heart rate of x, the running heart rate will be (140.25/78.5)x = 1.787x.

Hence, the linear equation between walking heart rate and running heart rate is y = 1.787x.

Now, for walking heart rate of 100 bpm of a girl, the running heart rate will be = 1.787 × 100 bpm = 1787.7 bpm.

Learn more about linear equation here: https://brainly.com/question/2263981

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Answer:

4, because 32/8 = 4.

Hope this helps!

Answer:

it is b because if you count the points it 11 of them

Step-by-step explanation:

Answer:

8 car's for 88$ the same thing for the 6 car's for 66$

Answer:

Laura washed 8 cars to earn $ 88

Step-by-step explanation:

Number of cars : earnings = 6 : 66

6 : 66 :: x : 88

Product of mean  = Product of extremes

 66 * x = 6 *88

        x = [tex]\frac{6*88}{66} = \frac{1*88}{11}[/tex]

       x = 8

Answer:

x = 4

Step-by-step explanation:

Given

6x - 5y = 14 ← substitute y = 2 into the equation

6x - 5(2) = 14

6x - 10 = 14 ( add 10 to both sides )

6x = 24 ( divide both sides by 6 )

x = 4

Answer:

[tex]\huge\boxed{\sf x = 4}[/tex]

Step-by-step explanation:

[tex]\sf 6x-5y = 14\\\\Put \ y = 2\\\\6x - 5(2) = 14\\\\6x - 10 = 14\\\\ Adding \ 10 \ to \ both \ sides\\\\6x = 14+10\\\\6x = 24\\\\Dividing \ both \ sides \ by \ 6\\\\x = 24 / 6\\\\x = 4\\\\\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

m = -2/1 or just m  = -2

Step-by-step explanation:

Multiply the numerator together and the denominators together.

1 x 5 / 6 . 7 = 5/42

42 is not a multiple of 5 so the answer is already in the lowest term.

The answer is 5/42

Step-by-step explanation:

1. First calculate for the gradient m

2. Calculate for the constant C by using any point (0,3) or (3,9)

3. Lastly, put the values found in the equation y = mx + c

1. m = Y2-Y1/X2-X1

=9-3/3-0=2

2. input one point together with m into the equation y=mx+c

3=2(0)+C

C=3

3. Therefore equation of linear relationship is

y = 2x + 3

Answer:

AA

Step-by-step explanation:

The sides aren’t really useful to know why the triangles are similar. So you can use the AA method to know that they are similar triangles.

Answer:

Given - Ratio of boys to girls is 3 : 1

Total 36 students

To find - No. of girls

Solution

Let the ratio be 3x and X

3x + X = 36

4x = 36

x = 36/4

x= 9

1x = 9

There are 9 girls in the class

Answer:

9 girls

Step-by-step explanation: If u write it out like this 3:1 6:2 and onwards till the two numbers add to 36 you will get the answer of 9 this should be right sorry if it isn't

Answer:

240 miles

Step-by-step explanation:

Given that:

Charges offered by Prestige car rentals for renting a midsize vehicle:

Fixed charges = $47

Per mile charges for renting a midsize vehicle = $0.07

Charges offered by Gateway Auto for renting a midsize vehicle:

Fixed charges = $35

Per mile charges for renting a midsize vehicle = $0.12

To find:

Number of miles for which both the companies charge the same price?

Solution:

Let the number of miles for which both the companies will charge the same price = [tex]x[/tex] miles

Charges for one mile by Prestige car rentals = $0.07

Charges for [tex]x[/tex] miles by Prestige car rentals = $0.07[tex]x[/tex]

Total charges by Prestige Car rentals = $47 + $0.07[tex]x[/tex]

Charges for one mile by Gateway Auto = $0.12

Charges for [tex]x[/tex] miles by Gateway Auto = $0.12[tex]x[/tex]

Total charges by Gateway Auto = $35 + $0.12[tex]x[/tex]

As per question statement, the charges are same:

[tex]\$47 + \$0.07x = \$35 + \$0.12x\\\Rightarrow 12=0.05x\\\Rightarrow x=\dfrac{1200}{5}\\\Rightarrow \bold{x=240\ miles}[/tex]

Answer:

36

Step-by-step explanation:

you have to do ratios like

3=3 6=6 for sodas

and hotdogs

2=5 4=10 6=15 8=20 10=25 12 =30

hope this helps

-mercury

Answer:

the teacher bought 100 balloons, and 95 of them were left for the party.

Step-by-step explanation:

red balloons is given, 40.

first you find the green balloons.

the number of green balloons is 3/5 the number of red balloons.

3/5 * 40 = 24

so there are 24 green balloons.

next is yellow balloons.

the number of green balloons is 2/3 the number of yellow balloons.

24 = 2/3 * x

24 ÷ 2/3 = x

24 ÷ 2/3 = 36

there are 36 yellow balloons.

find the total balloons:

40 + 24 + 36 = 100

the teacher bought 100 balloons.

1/20 of the red balloons popped.

1/20 * 40 = 2

2 of the red balloons popped

1/12 of the green balloons popped

1/12 * 24 = 2

2 of the green balloons popped.

1/36 of the yellow balloons popped

1/36 * 36 = 1

1 yellow balloon popped

2 + 2 + 1 = 5

100 - 5 = 95

there were 95 balloons left for the party.

Answer:

Im sorry but I have no idea

Step-by-step explanation:

Answer:

The answer should be 258

Step-by-step explanation:

Because my teacher taught us this. And we divided. So if you divide 12,000 by 2.15% that give you 258. I really hoped this helped!

Answer:

The section of a parabola that shows a falling curve with decrease in the y values of the graph is known as the decreasing interval of the quadratic function

Step-by-step explanation:

Answer:

to find the total number of miles traveled, you have to add the total distance from point L to point M together. 929+ 595 = 1,524 total miles traveled

to find the average miles per hour, you divide the total miles traveled, by the amount of time it took. 1,524 / 3 = 508 miles per hour

Step-by-step explanation:

Answer:

Step-by-step explanation:

LV to Colorado Springs = 595 miles

Colorado Springs to Mil=  929 miles

Total distance =                1524  miles

Average Speed = 1524 miles / 3 hours

Average Speed =  508  miles / hour

Answer:

62 degrees

Step-by-step explanation:

Since it is a straightline, the sum of both angles are 180

So, 180 - 118 = 62

Answer:

ask your teacher

Step-by-step explanation:

ask your teacher

Answer:

XZ ≈ 14.4 cm

Step-by-step explanation:

Using the cosine ratio in the right triangle, that is

cos29° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{YZ}{XZ}[/tex] = [tex]\frac{12.6}{XZ}[/tex] ( multiply both sides by XZ )

XZ × cos29° = 12.6 ( divide both sides by cos29° )

XZ = [tex]\frac{12.6}{cos29}[/tex] ≈ 14.4 cm ( to 3 significant figures )

Answer:

-5x^4+7x^2

Combine like terms to simplify

Answer:

-5x^2+7x^2

Step-by-step explanation:

3x^4-5x+7x^2-8x^4+5x

3x^4-8x^4-5x+5x+7x^2

-5x^4+7x^2