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3 years ago

8

Ed saved $50 one week. For the next 6 weeks he saved $25 more than he saved the week before. How much did he save in all? One st

udent solved this problem using the expression $50 + 6($25) =$200. What error was made? What is the correct answer?

1 answer:

Grace [21]3 years ago

4 0

Answer:$825. 00

Add $25.+50. For week 1 then add $25.each additional week for 6weeks.

Step-by-step explanation:

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Please help me if you can. Please also write how you got the answer thank you.

Sever21 [200]

The answer is 8shares

Step- My - Step
2,000 divided by 237.68
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3 years ago

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A positive integer is twice another.the sum of the reciprocal of the two positive integer is 3/14. Find the integers

icang [17]

Answer:

$\huge\boxed{14\ \text{and}\ 7}$

Step-by-step explanation:

$n,\ m-\text{positive integer}\\\\n=2m-\text{a positive integer is twice another}\\\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}-\text{the sum of the reciprocal of the two positive integer is }\ \dfrac{3}{14}\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}n=2m&(1)\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}&(2)\end{array}\right$

$\text{Substitute (1) to (2):}\\\\\dfrac{1}{2m}+\dfrac{1}{m}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{1\cdot2}{m\cdot2}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{2}{2m}=\dfrac{3}{14}\\\\\dfrac{1+2}{2m}=\dfrac{3}{14}\\\\\dfrac{3}{2m}=\dfrac{3}{14}\Rightarrow2m=14\qquad\text{divide both sides by 2}\\\\\dfrac{2m}{2}=\dfrac{14}{2}\\\\\boxed{m=7}$

$\text{Substitute it to (1):}\\\\n=2\cdot7\\\\\boxed{n=14}$

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2 years ago

3/4 = x/20 i need the answer i beg

Nady [450]

Answer:

15/20

Step-by-step explanation:

4 x 5 = 20

so

3 x 5 = 15

so (sorry for the repetition)

= 15/20

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3 years ago

You can buy 5 items for $10, how much will it cost for 8 items?

shtirl [24]

Answer:

$16

Step-by-step explanation:

Looking at the Price for 5 Items (10 dollars), That means the Price Per Item Is 2 dollars. Now we know the Cost per Item, We need to multiply the Cost per item by 8 (2*8) making it 16.

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tensa zangetsu [6.8K]

.......hope this helps

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3 years ago