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Leya [2.2K]
3 years ago
11

PLEASE PLEASE HELP!!! WILL GIVE BRAINLIEST

Mathematics
1 answer:
STALIN [3.7K]3 years ago
4 0

Answer:

a. this b>9 B. the first one C. the second one

Step-by-step explanation:

D is the first one

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A construction company wants to hire carpenters for $220 a day and plumbers for $260 a day. The company wants to hire at least 1
joja [24]

Answer:


Step-by-step explanation:

Yes the company can hire 6 carpenters and 12 pumbers

So first lets find out how much it costs to have 6 carpenter for $220 a day.

$220 × 6 = $1320  this is how much it cost to pay 6 carpenters for one day.

Now lets find how much it cost to 12 plumbers at $260 a day.

$260 × 12 = $3120 this is how much it costs to pay 12 plumbers a day.

The total amount you have to pay to the workers is:

$3120 + $1320 = $4440

Your budget was $4500 so the total costs for the workers is $4440 which means you can hire those workers and you would still have $60.


3 0
3 years ago
Multiple-choice questions on Advanced Placement exams have five options: A, B, C, D, and E. A random sample of the correct choic
Semenov [28]

Answer:

Option <em>B</em> is not the most common correct choice.

Step-by-step explanation:

The multiple-choice questions on Advanced Placement exams have five options: A, B, C, D, and E.

The probability that any of these five option is the correct answer is:

p=\frac{1}{5}=0.20

A random sample of 400 multiple-choice questions on Advanced Placement exam are selected.

The results showed that 90 of the 400 questions having B as the answer.

To test the hypothesis that option B is more likely the correct answer for most question, the hypothesis can be defined as:

<em>H₀</em>: All the options are equally probable, i.e. <em>p</em> = 0.20.

<em>Hₐ</em>: Option B is more likely the correct option, i.e. <em>p</em> > 0.20.

Compute the sample proportion as follows:

\hat p=\frac{90}{400}=0.225

The test statistic is:

z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}=\frac{0.225-0.20}{\sqrt{\frac{0.20(1-0.20)}{400}}}= 1.25

The test statistic is 1.25.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the <em>p</em>-value as follows:

p-value=P(Z>1.25)\\=1-P(Z

*Use a <em>z</em>-table.

The <em>p</em>-value is 0.1057.

The <em>p</em>-value of the test is quite large. Thus, the null hypothesis was failed to rejected.

Hence, it can be concluded that option <em>B</em> is not  the most common correct choice.

7 0
3 years ago
Cup o’ Coffee buys its coffee for $1.25 a cup. The coffee shop then sells each cup for $3.75. What is the percent markup for a c
oee [108]

Answer:

47%

Step-by-step explanation: 375 × .125 = .046875

rounding up, 5 keeps the 7 as is, 7 is greater than 5, therefore the 8, becomes a 9, 9 is greater than 5, so the 6 becomes a 7, .047.

move the decimal three digits to the left and you get, 47%.

4 0
2 years ago
Find B in the graph below
olasank [31]
I think b=6. so try that ok 
8 0
3 years ago
Solving compound inequalities <br><br> 14r+20 &lt;14r+16 or 8-10r&gt;15-9r
vova2212 [387]
14r+20<14r+16 or 8−10r>15−9r

14r+20<14r+16

14r+20−14r<14r+16−14r(Subtract 14r from both sides)

20<16

20−20<16−20(Subtract 20 from both sides)

0<−4



8−10r>15−9r

−10r+8>−9r+15(Simplify both sides of the inequality)

−10r+8+9r>−9r+15+9r(Add 9r to both sides)

−r+8>15

−r+8−8>15−8(Subtract 8 from both sides)

−r>7

−r/−1 > 7/−1(Divide both sides by -1)

r<−7




Ur answer is:

r < - 7  OR   0 < - 4

7 0
3 years ago
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