What is twice 2^30? write using exponents

Answers

Answer 1

Answer: 2^31

use the rule that states the product of the same base with different powers you add them

(a^n) times (a^m) = a^(n+m)

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Find the least common multiple of 10 , 15 , and 3

Answers

3 = 3
10=2 x 5
15=. 5 x 3
lcm=2x5x3=30

Which of the following is a reasonable estimated answer to the following problem?989,867 ÷ 999

*10
*100
*1,000
*10,000

Help please?

Answers

$989,867 \approx 1,000,000$
$999 \approx 1000$

$\implies (989,867)/(999) \approx (1,000,000)/(1000)$
$(1,000,000)/(1000) = 1000$

So the answer is approximately 1000.

Answer:

1,000

I did it in my math wok and got it correct

What is -3.9 plus 1.2?

Answers

-2.7 because -3.9 plus 1.2 is -2.7

-2.7 is the answer to this problem

Find the reciprocal of the number. Multiply to check your answer.2/3

A.1/2

B.3/2

C.2

D.3

Answers

To find the reciprocal of a fraction, you just need to "flip" it. To check your work, you multiply the fraction and the reciprocal to get 1.

the reciprocal if 2/3 is 3/2

$(2)/(3) * (3)/(2) = (6)/(6) = 1$

The answer is B

i think it would be B

for 15 weeks, sue put the same amount of money in a jar. then she took $9 out to spend on a friend's birthday present. she had $21 left. how much did she put in each week?

Answers

$x=amount\ she\ put\ in\ each\ week \n 15x-9=21 \n 15x=30 \n x= (30)/(15) \n x=2 \n \boxed{2\ dollars\ each\ week}$

$2 because you add the 9 back to the 21 then divide by 15 to get 2

What equals to 31 using multiplication?

Answers

5 times 6.2 is your answer!!!:)

15.5 times 2 is another answer

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Sam measured the height of a window frame as 5.23 feet, but the actual height was 6 feet. What is the percentage of error in Sam's measurement?

Cierra has 3 more than one half as many purses as Aisha. Define a variable and write an expression to represent the number of purses in Cierra's collection. Then find the number of purses in Cierra's collection if Aisha has 12 purses.

How do you solve -5n-8(1+7n)=8

Please help with these quick