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Daniel [21]
3 years ago
15

Evaluate the expression |- 15| + | -7|

Mathematics
1 answer:
12345 [234]3 years ago
4 0

Answer:

Step-by-step explanation:

The lines in between the numbers are called absolute value bars. Whenever you see numbers that have absolute value bars, know that the numbers become positive.

Therefore,

|-15| = 15

|-7| = 7

Now we just add,

15+7=22

Final answer = 22

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-4 is the ___ 4 A: additive inverse of B: additive equivalent of C: same as D: opposite of
agasfer [191]

Answer:

additive inverse of

Step-by-step explanation:

Additive inverse of any number is that number added to the given number result into zero. For example a is an additive inverse of -a because a+(-a) = a-a = 0

According to the question, -4 and 4 are additive inverse of each other. Hence -4 is the additive inverse of 4

8 0
3 years ago
{2x+2y=2,2(x+y)=10}A. single solution B. no solution C. infinite solutions
mixer [17]

To find the number of solutions of a system of linear equations you need to identify the slope (m) in each equation:

y=mx+b

-If the slope is the same in both lines the system has no solution

-If the slope is different in the lines the system has one solution

-If the equation are the same (incluided the value of b) the system has infinitely many solutions

You have the next equations:

\begin{gathered} 2x+2y=2 \\ 2(x+y)=10 \end{gathered}

Write the equations in slope-intercept form y=mx+b (solve for y).

First equation:

\begin{gathered} 2y=-2x+2 \\ y=-\frac{2}{2}x+\frac{2}{2} \\  \\ y=-x+1 \end{gathered}

Second equation:

\begin{gathered} 2x+2y=10 \\ 2y=-2x+10 \\ y=-\frac{2}{2}x+\frac{10}{2} \\  \\ y=-x+5 \end{gathered}As the equations have the same slope m = -1, the system has no solution (the line doesn't cross each other)
5 0
2 years ago
Predict what will happen to the graph of the line 2y=3x-6 if the slope was changed to 2
Setler79 [48]

Answer:

y = 3/2x-3 vs. y = 2x-3

Step-by-step explanation:

2y=3x-6  ------ y = 3/2x-3

3 0
3 years ago
Let f(x)=7x+5 and g(x)=x-1. If h(x)=f(g(x)), then what is the inverse of h(x)
lina2011 [118]
I dont really know how to explain it so i just solved it (the answer is boxed) but i hope this helps !

8 0
3 years ago
Read 2 more answers
A shirt on sale for 25%off. Sandy paid 7.50 for the shirt. What was the shirts regular price
Gnesinka [82]

£10

Step-by-step explanation:

firstly what you have to do is

since the percentage is decreased

we will say 100 - 25% = 75%

then we say 7.50/75% = 10

So we know that the original price was

£10 pounds

As 10- 25%= 7.5

4 0
2 years ago
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