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3 years ago

What is the value of x in the equation x – y = 30, when y = 15?

Mathematics

2 answers:

SVEN [57.7K]3 years ago

5 0

x – y = 30, when y = 15
x - 15 = 30
x = 30 + 15
x = 45

answer: when y = 15, x = 45

denis23 [38]3 years ago

4 0

The answer would be 45.

1. Add 15 to both sides (x = 30 + 15)

2. Simplify 30 + 15 to 45 (x = 45).

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Identify the equation in slope intercept from that has a slope of 2 and goes through the point (4, 6).

Mars2501 [29]

Answer:

y = 2x−2

Step-by-step explanation:

You are given a slope and a point, so you can write the equation using point-slope form:

y -k = m(x -h) . . . . . . a line with slope m through point (h, k)

Putting in the numbers given, you have ...

y -6 = 2(x -4)

y = 2x -8 +6 . . . . eliminate parentheses, add 6

y = 2x -2 . . . . . . . collect terms.

You know that the slope is the coefficient of x, so the first choice is eliminated right away. Trying the point values in the other equations shows you that they only work for the last choice, as shown above.

2·4 +14 = 22 ≠ 6 . . . . second choice doesn't work
2·4 +6 = 14 ≠ 6 . . . . . third choice doesn't work
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3 years ago

Read 2 more answers

Which of the following is a example of a infinite decimal?

olga_2 [115]

Step-by-step explanation:

pi goes on infinitely so no matter what its multiplied by it would go on infinitely

4 0

3 years ago

There are 45 new houses being built in a neighborhood Last month, 1/3 of them were sold. This month, 1/5 of the remaining houses

goldfiish [28.3K]

1/3 of 45 is 15.

So 45-15= 30.

1/5 of 30 is 6.

So 30-6=24.

There are 24 houses left to be sold.

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3 years ago

Pls help ;/ not hard btw

Colt1911 [192]

Answer:

$- 10z - 2$

Step-by-step explanation:

this is simplify

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3 years ago

The amount Lin's sister earns at her part-time job is proportional to the number

jarptica [38.1K]

the equation framed in the form of y=kx is $y = 9.6(x)$ and , x as a function of y $x=\frac{1}{ 9.6}(y)$ .

Step-by-step explanation:

Here we have , The amount Lin's sister earns at her part-time job is proportional to the number of hours she works. She earns $9.60 per hour. We need to find an equation in the form y=kx to describe this situation, where x represents the hours she works and y represents the dollars she earns.Is y a function of x . Also , Write an equation describing x as a function of y . Let's find out:

Here , Lin's sister earns $9.60 per hour . Let x represents the hours she works and y represents the dollars she earns . So , According to question following is the equation framed in the form of y=kx :

⇒ $y = 9.6(x)$

Yes, y is a function of x , as a straight line with a slope of 9.6

Now , x as a function of y :

⇒ $\frac{y}{ 9.6}=(x)$

⇒ $x=\frac{1}{ 9.6}(y)$

Therefore , the equation framed in the form of y=kx is $y = 9.6(x)$ and , x as a function of y $x=\frac{1}{ 9.6}(y)$ .

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3 years ago