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Aleks04 [339]
2 years ago
15

PLZ help me i cant figure out these 2 questions!!!!!!!!

Mathematics
2 answers:
Hatshy [7]2 years ago
4 0
Number 1 is a because you would minus 1 from both sides to get the x alone.

motikmotik2 years ago
3 0
4)
first and last are your answers

x + 1 = 7
6+ 1 = 7
7 = 7 (true)

6(x+2)=2x-5(x-8)+26
6(6+2) = 2(6) - 5(6-8) +26
6(8) = 12 - 5(-2) + 26
48 = 12 + 10 + 26
48 = 48 (true)

5)
first and last are your answers

3(2/5)+4=5 1/5
6/5 +4=26/5
6/5 20/5 = 26/5
26/5 = 26/5 (true)

1/3 (2/5) + 5/3 = 2(2/5)+1
2/15 + 5/3 = 4 /5 + 1
2/15 + 25/15 = 12/15 + 15/15
27/15 = 27/15 (true)


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A friends is buying flowers for mother's day. Because it is her 38th birthday, your friend want to have 38 of her favorite flowe
777dan777 [17]

Answer: She bought 28 daises and 10 Tulips.

Step-by-step explanation:

Let x represent the number of daises bought.

Let y represent the number of tulips bought.

Your friend want to have 38 of her favorite flowers. This means that

x + y = 38

Her favorite flowers are daisies at 1.50 each and tulips at 2.50 each if the total bill was 67, it means that

1.5x + 2.5y = 67 - - - - - - - - - - - - 1

Substituting x = 38 - y into equation 1, it becomes

1.5(38 - y) + 2.5y = 67

57 - 1.5y + 2.5y = 67

- 1.5y + 2.5y = 67 - 57

y = 10

x = 38 - y = 38 - 10

x = 28

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Gavin earns more because he earns 20 per hour and eva earns 11.5 per hour.

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The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing graduate management education. GMAT
telo118 [61]

Answer:

Null hypothesis: \mu_{Phil} \geq 550

Alternative hypothesis: \mu_{Phil} < 550

Step-by-step explanation:

1) Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

2) Solution to the problem

Let X the random variable that represent the score for all test‑takers and the distribution for X is:

X \sim N(\mu =550,\sigma=120)

Let \mu_{Phil} the true mean for the Philippines.

On this case we want to test is \mu_{Phil}

So the correct system of hypothesis for this case would be:

Null hypothesis: \mu_{Phil} \geq 550

Alternative hypothesis: \mu_{Phil}< 550

In order to test we know the population deviation and the sample size n=250. But we need the sample mean and a significance level to test the claim.

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