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agasfer [191]
3 years ago
6

What is 31 billion in scientific notation

Mathematics
1 answer:
IrinaVladis [17]3 years ago
8 0
3.1 x 10 to the tenth power

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What is the product of 2x - 5 and 3x2 + 5x - 7? Write your answer in standard form.
andrew11 [14]

Answer:

a) 6x³ − 5x² − 39x + 35

b) no

Step-by-step explanation:

(2x − 5) (3x² + 5x − 7)

Distribute:

3x² (2x − 5) + 5x (2x − 5) − 7 (2x − 5)

Distribute again:

6x³ − 15x² + 10x² − 25x − 14x + 35

Combine like terms:

6x³ − 5x² − 39x + 35

5x − 2 is the opposite of 2x − 5, so you would get the negative of the answer from part (a).

8 0
3 years ago
Two sides of a right triangle have lengths of 2 centimeters and 5 centimeters. The third side is NOT the hypotenuse. How long is
Elanso [62]

Answer:

About 1.625

Step-by-step explanation:

I believe it is 1.625

( 2^2 + b^2 = 5^2 )

8 0
3 years ago
A national interest rate on houses for 25 years is 4.3%. A banker in a large northwestern city believes that the local interest
stepladder [879]
The national interest rate on houses for 25 years is 4.3%. The banker wishes to test that the local interest rates are lower than the national rate. So he should use the initial data of 4.3% interest as his base data. Then he should investigate the rates of houses in the local vicinities and compare it to his base data. 
7 0
4 years ago
What fraction do you multiply 3 by to get 1
oee [108]
The answer is 1/3

1/3 + 1/3 + 1/3 equals 1

which is the same as 1/3 times 3
3 0
3 years ago
Mason opens a savings account by making a $165.85 deposit. Every week, he deposits another $20.50 in the account.
tiny-mole [99]

Answer:

i think that it would be

$370.85

Step-by-step explanation:

The following expression shows the amount of money in the account after x weeks.

If $20.50 was added to the account for 10 weeks we can substitue 10 as the x:

$370.85 will be in the account after 10 weeks

8 0
3 years ago
Read 2 more answers
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