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3 years ago

Answers with work plz

Mathematics

1 answer:

Aleks04 [339]3 years ago

7 0

Answer:

15. 50.24

Step-by-step explanation:

pi times r squared

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What is 670,130,000 km in scientific notation

MrRa [10]

Answer:

6.7013x10⁸ km

Step-by-step explanation:

670,130,000 km

=6.7013x10⁸ km

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4 years ago

Read 2 more answers

3 x minus 2 by 4 minus 2 X + 3 by 3 equals to 2 by 3 minus x find the value of x

Rama09 [41]

Answer:

i love math

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Step-by-step explanation:

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3 years ago

What is the first step when evaluating the expression (4+8÷2)×5-1

Anton [14]

(4+8/2)*5-1

first step divide in the parentheses

(4+4)*5-1

second step add in the parentheses

8*5-1

third step multiply

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3 years ago

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Which number is rational?

OlgaM077 [116]

Answer:

its the square root of 16

Step-by-step explanation:

because while 10 and 2 are whole numbers when you place the root it can't be expanded and pi is irrational

4 0

3 years ago

Caleb has 20 more books than Danica. If Caleb gives Danica half of his books, Danica will have 4 more books than Caleb. How many

wariber [46]

Answer:

Option E: 24.

Step-by-step explanation:

When Caleb (C) has 20 more books than Danica (D), we have:

$C = 20 + D$ (1)

Now, when Caleb gives Danica half of his books:

$C' = C - \frac{C}{2}$ (2)

Danica will have 4 more books than Caleb, so:

$D' = D + \frac{C}{2}$ (3)

Also we have that:

$D' = C' + 4$ (4)

By entering equation (2) and equation (3) into equation (4) we have:

$D + \frac{C}{2} = C - \frac{C}{2} + 4$ (5)

From (1) we have:

$D = C - 20$ (6)

By entering (6) into (5):

$C - 20 + \frac{C}{2} = C - \frac{C}{2} + 4$

$C = 24$

And, from (6):

$D = C - 20 = 24 - 20 = 4$

Therefore, the correct option is E, Caleb had to start with 24 books.

I hope it helps you!

3 0

4 years ago