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lisabon 2012 [21]
3 years ago
10

Explain step by step please!

Mathematics
2 answers:
vladimir2022 [97]3 years ago
6 0

Answer:

2.5lb

Explanation:

In equation form the question is asking for <em>x</em> in

30(x) = 75

Since multiplication is reversible (to be division), we can switch the equation up.

75 ÷ 30 = x

So the answer is

75 ÷ 30 = 2.5

adelina 88 [10]3 years ago
5 0

Answer:

Each book weighs 2.5 pounds.

Step-by-step explanation:

75/2.5 is 30.  Or you could also get the answer by 30* 2.5 which it would be 75. So, therefor, the answer is 2.5.

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Write each percent as a fraction in simplest form<br>60%​
s2008m [1.1K]

Answer:

3/5

Step-by-step explanation:

ir would be 6/10 but simplified it would be 3/5

7 0
2 years ago
Read 2 more answers
The mean work week for engineers in start-up companies is claimed to be about 64 hours with a standard deviation of 8 hours. Kar
blondinia [14]

Answer:

1.) mean

2.) H0 : μ = 64

3.) 0.0028

4) Yes

Step-by-step explanation:

Null hypothesis ; H0 : μ = 64

Alternative hypothesis ; H1 : μ < 64

From the data Given :

70; 45; 55; 60; 65; 55; 55; 60; 50; 55

Using calculator :

Xbar = 57

Sample size, n = 10

Standard deviation, s = 7.14

Test statistic :

(xbar - μ) ÷ s/sqrt(n)

(57 - 64) ÷ 8 / sqrt(10)

Test statistic = - 2.77

Pvalue = (Z < - 2.77) = 0.0028 ( Z probability calculator)

α = 10% = 0.1

Reject H0 ; if P < α

Here,

P < α ; Hence, we reject the null

6 0
3 years ago
Solve For 1/4 + 1/2 + x = - 3/4
ivann1987 [24]

Answer:

x= negitive 6/8

Step-by-step explanation:

Ok think about it 1/4 plus 1/2 is 3/4

so how do i go to negitives?

you double the amount of it and then minus it

because 3/4- 3/4 would be zero

so you have to double it to get that answer

have a wonderful day filled with only joy!

5 0
3 years ago
Find the value of x. round to the nearest tenth
Anna007 [38]

Answer:

using Pythagoras theorem x=32.7

3 0
3 years ago
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Simplify (9 + 8 – 6)(4 – 5)<br><br> Please show your work.<br><br> Thanks for your time!
IrinaK [193]

Answer:

-11

Step-by-step explanation:

(9+8-6)(4-5)

(17-6)(-1)

(11)(-1)

-11

8 0
3 years ago
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