sam makes $400 per week plus $20 commission oh each new cell phone plan she sells. write an equation to determine how many new plans she sold to earn $680 last week.

Answers

Answer 1

Answer: To write the equation, you can start with the answer of $680. She receives $400 + $20*plans sold:400 + 20p = 68020p = 280p = 14{$400 + $20 * 14 = 680}Sam sold 14 plans to make a total of $680.

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Sarah's English test had 90 questions and she got 18 questions wrong. What percent of the questions did she get correct?

Answers

So,

Sarah got 72/90 questions correct.

Simplify 72/90
72 = 2 * 2 * 2 * 3 * 3
90 = 2 * 3 * 3 * 5

Cross out "ones"
2 * 2 over
5
4/5 = 80%

Sarah got 80% of the questions correct

90-18=72 questions (answered correct)
72/90=0.8
To get the percent, you have to move the decimal point over two places, so 80%

What are the next three terms in the sequence? -3, 6, 15, 24

Answers

Its adding 9 every time.
-3, 6, 15, 24, 33, 42, 51, 60

Solve the equation for y. yp+yn=x

Answers

This is tricky because it has a lot of variables, but we just have to treat this problem normally.

$yp+yn=x$

separate y from p + n (feel free to check that you can do this by multiplying y out again and seeing that we have the same thing as before)

$y(p+n)=x$

divide p + n on both sides

$y = (x)/(p+n)$

Answer:

$y = (x)/(p+n)$

There were 450 students enrolled in a middle school at the beginning of the school year. The number of students enrolled in the school at the end of the year was 10 percent greater than the number of students enrolled in the school at the beginning of the year. How many students were enrolled in the school at the end of the year?

Answers

Answer:

495 students

Step-by-step explanation:

find 10% of 450:

450 x 0.1 = 45

45 students added through the year

now add 45 to the original 450 students

450 + 45 = 495

The formula f equals c over lambda, where f = frequency, c = wave speed, and λ = wavelength, is used to calculate frequency. Solve this formula for c.A.c = f − λ
B.c = fλ
C.c = f + λ
D.c equals f over lambda

Answers

Answer:

B. c = fλ

Step-by-step explanation:

Given formula,

f equals c over lambda,

$\implies f=(c)/( \lambda)$

Where, f = frequency,

c = wave speed,

λ = wavelength,

By the above formula,

$f* \lambda = c$ ( By cross multiplication ),

Hence, the required formula for c,

$c=f\lambda$

Option 'B' is correct.

Step-by-step explanation:

if f = c/lambda

then c = f × lambda

Please please help 1-5

Answers

Answer:

1. 12 bags for total cost of 119.88

2. Yes. You'll make $180.12 for your labor.

3. Other tools, transportation, weather delay etc.

4. $28.02

5. Yes

Step-by-step explanation:

Begin by finding the area of the field. The field is a rectangle and measures 360 by 160. The area is A = l*w = 360*160 = 57,600 square feet. One bag of fertilizer will cover 5000 square feet. Divide 57,600 by 5000 to find the number of bags needed. You'll need 11.52 bags or rounded 12 bags.

Since each bag costs $9.99, multiply 12 by $9.99 to get the total cost for the fertilizer. The cost is $119.88. If the athletic department pays you $300. You'll make 300 - 119.88 = 180.12 for your labor. This is a good profit.

If you have to purchase another tool for $40, then the cost increases to 159.88. This decreases your profit to 180.12 - 40 = 140.12. Divide your profit 140.12 by the 5 hours you work to find how much you earn per hour. You earn $28.02 per hour.

Yes, I would take the job, since $28.02 is well above minimum wage.

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