3 years ago

What is the value of this expression when a =-9?

Mathematics

1 answer:

brilliants [131]3 years ago

5 0

Answer: 10

Step-by-step explanation:

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I M not sure this is is right this is scientific notation

Drupady [299]

(4.18 × 9) = 37.62
10^-4 × 10^-4 = 10^-8
Then since you need to move the decimal over to make it in scientific notation, you add 1 to the 10^-8 , then you get 10^-7. The problem in scientific notation is 3.726×10^-7.

3 0

3 years ago

12 is 75% of what number?

katen-ka-za [31]

12=75%
more =100%
100/75×12
=16

4 0

3 years ago

Solve the proportion for the variable given. 4/v+10 - 6/v+6

belka [17]

$The\ domain:\\v+10\neq0\ \wedge\ v+6\neq0\\v\neq-10\ \wedge\ v\neq-6\\\\\dfrac{4}{v+10}=\dfrac{6}{v+6}\ \ \ \ \ |\text{cross multiply}\\\\4(v+6)=6(v+10)\ \ \ \ |\text{use distributive property}\\\\(4)(v)+(4)(6)=(6)(v)+(6)(10)\\\\4v+24=6v+60\ \ \ \ \ |\text{subtract 24 from both sides}\\\\4v=6v+36\ \ \ \ |\text{subtract 6v from both sides}\\\\-2v=36\ \ \ \ |\text{divide both sides by (-2)}\\\\\boxed{v=-18}\in D$