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NeTakaya
3 years ago
14

A book is 21 centimeters long, how long is this in meters?

Mathematics
1 answer:
Gnesinka [82]3 years ago
4 0

Answer:

0.21 meters :)

Step-by-step explanation:

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What is 624 divide by 27
mihalych1998 [28]

624/27

first you have to know what number that can be subtracted by 62

1. do 27 times 2 equal 54 then you subtract 62 by 54 equal 8 then you put 84 together that will 84 then multiply 27 times 3 = 81 then subtracted by 84

84-81 equal 3

In the calculator the answer is 23.1111111111

3 0
3 years ago
(2x+5)^2<br><br>is it 4x^2+20x+25?​
Daniel [21]
Yes that’s your answer!! Good job!!
4 0
3 years ago
A company has developed a new ink-jet cartridge for its printer that it believes has a longer life-time on average than the one
Mila [183]

Answer:

The test hypothesis is :

H_0: \mu=1502.5\\ H_a: \mu>1502.5

Step-by-step explanation:

Consider the provided information.

Null hypothesis refer the population parameter is equal to the claimed value.

If there is no statistical significance in the test then it is know as the null which is denoted by H_0, otherwise it is known as alternative hypothesis which denoted by H_a.

The historical average lifetime for cartridges produced by the current process is 1502.5 pages.

Hence, the test hypothesis is :

H_0: \mu=1502.5\\ H_a: \mu>1502.5

6 0
3 years ago
John and Ariana bought school supplies, John spent $10.65 on 4 notebooks and 5 pens. Ariana spent $7.50 on 3 notebooks and 3 pen
timurjin [86]

Cost of 1 notebook is $ 1.85 and cost of 1 pen is $ 0.65

<h3><u>Solution:</u></h3>

Let "a" be the cost of 1 notebook

Let "b" be the cost of 1 pen

Given that John spent $10.65 on 4 notebooks and 5 pens

cost of 1 notebook x 4 + cost of 1 pen x 5 = 10.65

4a + 5b = 10.65 ------ eqn 1

Given that Ariana spent $7.50 on 3 notebooks and 3 pens

3a + 3b = 7.50 ----- eqn 2

Let us solve eqn 1 and eqn 2 to get the values of "a" and "b"

Multiply eqn 1 with 3

12a + 15b = 31.95  ---- eqn 3

Multiply eqn 2 with 4

12a + 12b = 30 ------ eqn 4

Subtract eqn 4 from eqn 3

12a + 15b = 31.95

12a + 12b = 30

(-) ---------------------

3b = 1.95

b = 0.65

Substitute b = 0.65 in eqn 1

4a + 5(0.65) = 10.65

4a = 7.4

a = 1.85

Thus cost of 1 notebook is $ 1.85 and cost of 1 pen is $ 0.65

8 0
3 years ago
Geoffrey has 30 problems to do for math homework he finished 60 percent of them before play practice how many problems did Geoff
Vikentia [17]

Answer:

18 answers

Step-by-step explanation:

1) 30 of 60%

2)30*.6

3)18

check:

18/30=0.6

0.6=60%

3 0
3 years ago
Read 2 more answers
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