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3 years ago

60x-5=15 Solve for x will mark you

Mathematics

2 answers:

yawa3891 [41]3 years ago

5 0

Answer:

Step-by-step explanation:

What your gonna do is add five to 15. then you will have the equation: 60x=20. Then what your gonna do is divide each side by 60, so do 60 divided by 60 and 20 divided by 60, then you get your answer to be 0.3, which then converts to 1/3. So you answer would be X = 1/3.

Hope this helped!

Bailey :)

V125BC [204]3 years ago

4 0

Answer: $x=1/3$

Add 5 to both sides

$60x-5+5=15+5\\60x=20$

Divide both sides by 60

$60x/60=20/60\\x=1/3$

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A club decides to sell T-shirts for $12 each as a fund-raiser. It costs $20, plus $6 per T-shirt to make the T-shirts. Write and

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You would need to sell 20 shirts to make a 100 dollar profit.

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3 years ago

⦁ Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 24. How old is each sister?

Vitek1552 [10]

Answer:

Kim is 16 years old and her sister is 8 years old.

Step-by-step explanation:

We can use equations to represent this scenario.

Let Kim's age be 'k' and her sister's age be 's'.

Thus, k=2s (since Kim's age is double of her sister)

and k+s=24 (their ages add to 24 (from question)

Substituting the first equation:

2s+s=24

3s=24

s=8

Therefore, Kim's sister is 8 years old.

Now substitute this value into the second equation:

k+8=24

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Therefore, Kim is 16 years old.

6 0

3 years ago

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attashe74 [19]

Answer:

1 4/5

Step-by-step explanation:

6 - 4 1/5 = x

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6 0

3 years ago

The percentage of adults who currently play chess (at least once during the past year) is 12% in the UK. Suppose that in a rando

Likurg_2 [28]

Answer:

p represent the population parameter , true proportion of people who play chess in the UK

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

$z=\frac{0.1675 -0.12}{\sqrt{\frac{0.12(1-0.12)}{400}}}=2.923$

Step-by-step explanation:

Data given and notation

n=400 represent the random sample taken

X=67 represent the people who play chess

$\hat p=\frac{67}{400}=0.1675$ estimated proportion of people who play chess

$p_o=0.12$ is the value that we want to test

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

p represent the population parameter , true proportion of people who play chess in the UK

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion i higher than 0.13.:

Null hypothesis: $p \leq 0.12$

Alternative hypothesis: $p > 0.12$

When we conduct a proportion test we need to use the z statisitc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info required we can replace in formula (1) like this:

$z=\frac{0.1675 -0.12}{\sqrt{\frac{0.12(1-0.12)}{400}}}=2.923$

7 0

3 years ago