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lana [24]
3 years ago
13

If 3a= -9 ab = 15. What's the value of b

Mathematics
1 answer:
AlekseyPX3 years ago
3 0

Answer:

b = -5

Step-by-step explanation:

So we know

3<em>a</em> = -9

Divide 3 on both sides

<em>a</em> = -3

Plug <em>a</em> in to the other equation

-3b = 15

divide -3 on both sides

b = -5

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Please help, thank you!
Nadya [2.5K]

Answer:

37 and 26

Step-by-step explanation:

Let the bigger number be x and the smaller number be y.

Then the two numbers total 63 will give us:

y+x=63------>eqn1

The two numbers have a difference of 11.

y-x=11------->eqn2

We add equations 1 and 2 to obtain:

2y=74

Divide both sides to get:

y=37

Put y=37 into eqn2 to get:

37-x=11

x=37-11

x=26

This larger number is 37 and the smaller number is 26

4 0
3 years ago
Find the area of the regular octagon.
scZoUnD [109]

Answer:

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8 0
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i hope this is helpful
have a nice day 
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