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Alla [95]
3 years ago
8

X - 15 = 18 What is the value of x?

Mathematics
2 answers:
RSB [31]3 years ago
3 0

Answer:

x=33

Step-by-step explanation

2 step equation

add 15 to 18 because there's a minus in front of the 15

15+18=33

iren [92.7K]3 years ago
3 0

Answer:

X = 33

Step-by-step explanation:

bc 33 subtracted by 15 is 18

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scZoUnD [109]

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f ( x ) = x² - 1

Step-by-step explanation:

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Z is 109 and x is 13
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Which is bigger 1.4 or 1.04?​
jok3333 [9.3K]

Answer:

1.4

Step-by-step explanation:

This is because the 4 is in the hundreds place but the 0 is in the hundreds in the second one.

(Decimals are backwards from whole numbers.)

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The graph shows the relationship between the hours a soccer team practiced after the season started and their total practice tim
Sergio [31]

Answer:

6 hours

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

Let

x ----> the hours a soccer team practiced after the season started

y ----> the  total practice time for the year in hours

we know that

The y-intercept of a linear equation is the value of x when the value of y is equal to zero

In the context of this problem, the y-intercept is the  total practice time before the season began (the value of x is equal to zero)

Looking at the graph

The y-intercept is the point (0,6)

therefore

the  total practice time before the season began is 6 hours

5 0
3 years ago
Is my answer correct?
Black_prince [1.1K]

No, we do not multiply the first equation by 2 and then add it to the second equation. We have to multiply the first equation by 4.

To illustrate this point, consider system A:

\left\{ \begin{aligned}x - y &= 3 \\-2x + 4y &= -2\end{aligned}\right.

If we multiply the first equation by 2, we get

2x - 2y = 6

Now, if we replace the second equation with the sum of the second equation and 2x - 2y = 6, we get

\left\{ \begin{aligned}x - y &= 3 \\(-2x+2x) + (4y - 2y) &= -2 + 6\end{aligned}\right.

which simplifies to

\left\{ \begin{aligned}x - y &= 3 \\2y &= 4\end{aligned}\right.

This is not an equivalent system to System B. We can see that we ended up with a 2y = 4 equation.

In order to end up with a 2x = 10 second equation, we have to multiply the first equation of system A by 4 to get

4x - 4y = 12

If we replace the second equation with the sum of the second equation and 4x - 4y = 12, we get

\left\{ \begin{aligned}x - y &= 3 \\(-2x+4x) + (4y-4y) &= -2 + 12\end{aligned}\right.

which simplifies to

\left\{ \begin{aligned}x - y &= 3 \\2x &= 10\end{aligned}\right.

Otherwise, you are correct. The solution to system B is the solution to system A. Adding an equation to another does not change the system.

4 0
4 years ago
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