3 years ago

15+[-8 (-4)] how do I work this problem..

Mathematics

1 answer:

Juliette [100K]3 years ago

6 0

Multiply -8 by -4, then add fifteen! Your answer will be 47!

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10!/1!9!+10!/2!8!+10!/3!7!+10!/4!6!

Vladimir79 [104]

Answer: 1.3931 E 12

Step-by-step explanation:

plugged into the calculator and got this!

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3 years ago

A man leaves home at 20:15 hrs and

Mila [183]

Answer:

9 hours and 45 mins

Step-by-step explanation:

First, this is in army time. (Just so you know!) Also, it goes to 24 hours.

What you would do is add 45 mins to get to a single hour: so 20:15 + 45 = 21:00, then add 3 to get to 24:00 or 12:00 am, then add 6 more hours to get to 6:00 hours. So the final answer is 9 hours and 45 mins

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2 years ago

Eric has been donating books he no longer needs to his local library. After 3 months of donating, he had 157 books left in his r

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He donated about eleven books per month.

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3 years ago

Simplify each expression<br> EACH

Snowcat [4.5K]

Answer:

it is a result of 30 if I remember correctly

4 0

3 years ago

Read 2 more answers

Find the roots of the quadratic equation x^2 – 8x = 9 by completing the square. Show your work.

forsale [732]

Answer:

x = -1

x = 9

Step-by-step explanation:

First you have to equals the equation to zero, then you have to find two numbers that their sum equals 8 and multiplied equals -9. In this case, those numbers are -1 and 9.

$x^2-8x=9\\x^2-8x-9=0\\(x+1)(x-9)=0\\$

After you find those numbers, you split the equation and equals each term to zero.

$(x+1)=0, x=-1\\(x-9)=0, x=9\\$

So the answer is x=-1 and x=9

Hope you understand!

7 0

3 years ago