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3 years ago

Help me plz the answer is d right i dont reamber

Mathematics

1 answer:

Nat2105 [25]3 years ago

8 0

Answer:

C. The total amount spent on drinks by Andrew.

Step-by-step explanation:

y itself would be the number of drinks purchased, and 2.5 is the cost. And since is is 2.5y then it represents the total amount.

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A manufacturing plant earned $80 per man hour of labor when it opened Each year, the plant carns an

galina1969 [7]

Answer: 16

Step-by-step explanation:

80 divided by 5 equals 16

6 0

3 years ago

Here is a tape diagram representing the ratio of red paint to yellow paint in a mixture of orange paint.

Vinvika [58]

Answer:

2:3

Step-by-step explanation:

So there are 9 cups of red paint

There are 6 cups of yellow paint

Now we need yellow:red

6:9

Simplify it

2:3

So the ratio is 2:3 for yellow to red paint

3 0

3 years ago

The best answer gets brainiest please help!

vazorg [7]

Answer: 1) 10x+y=7

2) 3x-y=3

x-y=1

5 0

3 years ago

Read 2 more answers

Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

nydimaria [60]

Answer:

We need a sample size of 564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$\pi = \frac{81}{130} = 0.6231$

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when $M = 0.04$