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3 years ago

Estimate a 15% tip for a 26.80 meal

Mathematics

1 answer:

Rom4ik [11]3 years ago

7 0

4.02 so around 4 dollars :) hope this helps

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Is this a true statement? (-k) - 10k = -11k

marissa [1.9K]

Yes because if you solve it it will become -11k

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4 years ago

11. Set up the rational work application problem. Shelby and Mary started a beading

Arada [10]

The first one might be b or c

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3 years ago

The cost of chartering a bus for the great america trip was split evenly by the 20 students planning to go. The day before the t

rewona [7]

Answer:

20c= 30(c-9)

Step-by-step explanation:

The first step in solving a word problem is always to organize the information you have, and put it into equations to solve.

Let c be the cost per student originally.

The cost of the bus has not changed, so the cost/student * the number of students has not changed:

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3 years ago

A statistics teacher started class one day by drawing the names of 10 students out of a hat and asked them to do as many pushups

mash [69]

Using the t-distribution, we have that the 95% confidence interval for the true mean number of pushups that can be done is (9, 21).

For this problem, we have the standard deviation for the sample, thus, the t-distribution is used.

The sample mean is of 15, thus $\overline{x} = 15$ .
The sample standard deviation is of 9, thus $s = 9$ .
The sample size is of 10, thus $n = 10$ .

First, we find the number of degrees of freedom, which is the one less than the sample size, thus df = 9.

Then, looking at the t-table or using a calculator, we find the critical value for a 95% confidence interval, with 9 df, thus t = 2.2622.

The margin of error is of:

$M = t\frac{s}{n}$

Then:

$M = 2.2622\frac{9}{\sqrt{10}} = 6$

The confidence interval is:

$\overline{x} \pm M$

Then

$\overline{x} - M = 15 - 6 = 9$

$\overline{x} + M = 15 + 6 = 21$

The confidence interval is (9, 21).

A similar problem is given at brainly.com/question/25157574

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3 years ago

THIS IS VERY IMPORTANT! PLEASE HELP ME!!!

frez [133]

Equation at the end of step 1 : (8x + 2 • (x - 7)) - (10x - 14) = 0 Step 2 :Pulling out like terms :

2.1 Pull out 10x-14

After pulling out, we are left with :
 (10x-14) • ( 1 +( (-1) ))

Step 3 :Pulling out like terms :

3.1 Pull out like factors :

10x - 14 = 2 • (5x - 7)

Equation at the end of step 3 : 0 = 0

4 0

3 years ago

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