3 years ago

Pleaseee helpppp What is the sum of -3 and -12

Mathematics

1 answer:

faltersainse [42]3 years ago

7 0

Answer:

-15

Step-by-step explanation:

When adding together two negatives it works just as it would with positive numbers, just with the negative sign to properly negate it.

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2 years ago

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ZanzabumX [31]

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Step-by-step explanation:

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3 years ago

I think of a number double it, then reduce six. The result is 20. What is the number??

MissTica

Answer:

The number is 13

Step-by-step explanation:

the equation:

$2x-6=20$

The solution.

$2x=20+6$

$x=\frac{26}{2} =13$

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2 years ago

The sum of two numbers is 24. The difference is 15. What are the two numbers?

tatiyna

The numbers are "x" and "y",
we suggest this system of equations.
x+y=24
x-y=15
solve by reduction method.
x+y=24
x-y=15
-----------------
2x=39 ⇒x=39/2=19.5

x+y=24
-(x-y=15)
-------------------
2y=9 ⇒y=9/2=4.5

The numbers are 19.5 and 4.5

To check
19.5+4.5=24
19.5-4.5=15

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3 years ago

If m23 = 54°, find the measure of each missing angle.

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