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Anestetic [448]

3 years ago

14

A bag contains 15 coins consisting of quarters and dimes. The total value of the coins is $2.55. Which system of equations can b

e used to
determine the number of quarters, q, and the numbers of dimes, d, in the bag?

1 answer:

denis23 [38]3 years ago

5 0

Answer: d+q= 2.55

or d=15+q

I believe this is how you do it

Step-by-step explanation:

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snow_lady [41]

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What sample size should be used if we would like to estimate the mean age of the college students at a particular campus with 95

nevsk [136]

Answer: 12

Step-by-step explanation:

The formula to find the sample size is given by:-

$n=(\dfrac{z_c\cdot \sigma}{E})^2$ , where $\sigma$ is the population standard deviation, $z_c$ is the z-value for the $(1-\alpha)$ confidence interval and E is the margin of error .

As per given , we have

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3 0

2 years ago

Solve for "c". a(b-c)=d

leva [86]

Answer:

c = b -d/a

Step-by-step explanation:

a(b-c)=d

Divide each side by a

a(b-c)/a = d/a

b-c = d/a

Subtract b from each side

b-c-b = d/a -b

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Multiply each side by -1

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3 years ago

Answer this question below:

777dan777 [17]

Answer:

Step-by-step explanation:

a) Tip = 15% of bill = 15% * 21 = 0.15 * 21 = $ 3.15

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2 years ago