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3 years ago

Which ordered pair is the solution to this system of equations? y = x +4 x+y = 2

Mathematics

1 answer:

creativ13 [48]3 years ago

8 0

Use substitution
x + x + 4 = 2
2x = -2, x = -1
Y = -1 + 4, y = 3
Solution: (-1, 3)

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A mechanic charged $220.28 to repair a car. The price included charges for 3 hours of labor and $126.53 for parts. How much does

Assoli18 [71]

Answer:

$31.25

Step-by-step explanation:

Let's set up an equation.

$220. 28 - total

$126.53 - cost for parts

3 - # of hours

? - price per hour

3h + $126.53 = $220.28

Subtract $126.53 from both sides.

3h = $93.75

Divide by 3.

h = $31.25

The mechanic charges $31.25 per hour for labor.

Hope that helps.

6 0

2 years ago

Given the equation 2X +4/3 Y equals one and Y -9/13 x=9 by what Vector would you multiply the first equation so that combining t

Mila [183]

Answer: Option B

B. $\frac{9}{26}$

Step-by-step explanation:

We have the following equations:

$2x + \frac{4}{3}y = 1$ (1)

$y -\frac{9}{13}x=9$ (2)

Let us call "a" the coefficient of the variable x in the first equation and call "b" the coefficient of the variable x in the second equation.

Then we must multiply the number "a" by a value z such that when adding $az + b$ the result is zero. $a = 2$

$b = -\frac{9}{13}$

$2z-\frac{9}{13} = 0$

We solve the equation for z

$2z=\frac{9}{13}$

$z=\frac{9}{26}$

The first equation must be multiplied by a value of $\frac{9}{26}$

4 0

3 years ago

250 tickets were sold for a school play. Students tickets cost $8 and adult tickets cost $10. If $2200 was collected in ticket s

Kamila [148]

Answer:the answer is 220

Step-by-step explanation:2200 divided by 10

7 0

2 years ago

Read 2 more answers

the probability of pulling red or blue marbles (or both) from a jar of only red and blue marbles when you pull out two marbles g

Rzqust [24]

Answer:

True

Step-by-step explanation:

If there are an equal amount of red and blue marbles, then the statement would be true, since there's just as many red marbles in the jar as there are blue marbles.

8 0

3 years ago

Read 2 more answers

Mary ran 4 miles in 37 minutes. If she continued at the same pace, how long would it take her to run 11 miles?

Pavlova-9 [17]

Solution:

we are given that

Mary ran 4 miles in 37 minutes.

we have been asked to find

how long would it take her to run 11 miles?

Since Mary ran 4 miles in 37 minutes, it mean time taken to run 1 miles can be given by

$t_{1 \ mile}=\frac{37}{4} \ minutes.$

Hence we can write , time taken in running 11 miles as

$t_{11 \ mile}=\frac{37}{4}*11 \ minutes.\\ \\ t_{11 \ mile}=\frac{407}{4} \ minutes\\ \\ t_{11 \ mile}=101.75 \ minutes\\$

6 0

2 years ago