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svetoff [14.1K]
3 years ago
10

Semester I review -15+n=-9

Mathematics
1 answer:
lapo4ka [179]3 years ago
8 0

Answer:

n=-6

Step-by-step explanation:

-15-9=n

n=-6

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Using the number line as a guide, work out the difference between the numbers given.
inn [45]

Answer:

If these are addition:

1) 7

2) 3

3) 1

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5) 0

6) -5

If they are subtraction:

1) 9

2) 9

3) -7

4) 7

5) -4

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Step-by-step explanation:

Difference is subtraction, but your examples (7 and -3 = 10) implies that these are addition problems. Next time please set them up in a mathematical form.

This is how the problems would be set up:

Addition:

1) 8+(-1)= 7

2)6+(-3)= 3

3)-3+4= 1

4)2+(-5)= -3

4)-2+(-2)= 0

6)-1+(-4)= -5

Subtraction:

1) 8-(-1)= 9

2)6-(-3)= 9

3)-3-4=- 7

4)2-(-5)= 7

4)-2-(-2)= -4

6)-1-(-4)= 3

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2 years ago
The slope of a line that is perpendicular to a line whose slope is -2/7 is
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The answer is C.

Perpendicular lines have opposite reciprocal slopes. That means one is negative and the other is positive, and the fractions are flipped.
8 0
3 years ago
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Two neighbors, wilma and betty, each have a swimming pool. both wilma's and betty's pools hold 9900 gallons of water. if wilma's
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To solve this problem we will start by calculating time needed for each of them to fill the pool.

We have formula:
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Or
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Betty:
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Now we substract these two numbers:
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Betty needs 8.8 hours more than Wilma to fill the pool.
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433x3 how u start this off
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Answer :
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Sin(72°)=x÷20ft.
sin(72°)×20ft.= 19ft 252 inches
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5 0
2 years ago
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