# Algebra - 2 more questions... ^^

Thank you for helping on the other problem, but could you maybe explain how I should solve these two problems?

1. In 1985, Barry was 13 years old and his father was 43. In what year will Barry's age be two-fifths of his father's age?

2. The length of a certain rectangle is 20m and the length increased by 100m, the perimeter of the new rectangle would be twice the perimeter of the original rectangle. What are the dimensions of the original rectangle?

I did not get the fist problem at all, but for the 2nd problem I started by saying :
L=w+20 >>> l+w+20=P &&&
2(L+100)+2(w-20)=2P

I then plugged things in... and... :(

once again,
jason.

1. 👍
2. 👎
3. 👁
1. 1. Let the number of years past 1985 be x

then

13+x = 2/5(43+x)
65 + 5x = 86 + 2x
3x = 21
x = 7

so it will be in the year 1992 (1985+7)

for your #2, I think your wording is wrong, it does not match the expressions you have written

for l=w+20, I read that the length is 20 m more than its width, nowhere does it say that.
l+w+20=P ???
if that is to describe the perimeter it whould say:
2l + 2w = p
2(l+20 + 2w = p
2l + 2w + 40 = P

for 2(L+100)+2(w-20)=2P where does it say the width is decreased by 20?

1. 👍
2. 👎
2. The length of a certain rectangle is 20m and the length increased by 100m, the perimeter of the new rectangle would be twice the perimeter of the original rectangle. What are the dimensions of the original rectangle?

I started by saying :
L=w+20 >>> l+w+20=P &&&
2(L+100)+2(w-20)=2P

I then plugged things in... and... :(

2(120) + (2W) = 2(40 + 2W)

1. 👍
2. 👎

## Similar Questions

1. ### Math

The function f(x)=x^2. The graph of g(x) is f(x) translated to the right 3 units and down 3 units. What is the function rule for g(x)? I honestly have no idea how to this… An example or helping me get through the problem would

2. ### Math

A boy is mowing a rectangular lawn 40ft long and 30ft wide. He has cut all of it except for a rectangle that is 20ft long and 15ft wide. What fractional part of the lawn remains uncut? I need helping figuring out how to solve

3. ### Biology

A woman who is a carrier for hemophilia marries a man who does not have hemophilia. What are the chances of them having a son or daughter with hemophilia? Show your work. I need help with this short-answer/essay/written problem. I

4. ### English

Read each sentence then underline the helping verbs and circle the main verbs 1.Books do furnish a room helping:do main:furnish 2.I am walking to school these days helping:am main:walking 3.The water line must have burst.

1. ### Ap Chemistry

one problem the researchers faced was an uncertainty about whether the signals observed in certain mass spectrometry data were, in fact, due to lead isotopes. Explain why this was a problem. In other words, why wasn't information

2. ### Algebra, help + check please

Find the percent, round if nessacary: 1) 3 dollar tip for a 18.70 Taxi Fare. So 3 x 18 Correct? Or how would I even solve this problem? Thanks for helping -Allyson

3. ### Rhetoric: Harriet Tubman Quiz

As described in harriet tubman conductor on the underground railroad tubman dedicated her life to A: Helping change the views of slave owners B: Helping change laws about slavery C:Helping enslaved people escape*** D: Helping her

4. ### Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it

1. ### Algebra B

What is the coefficient of x in the division (18x3 + 12x2 – 3x) ÷ 6x2 ? 3 2 –0.5 –3 I am helping my granddaughter and I need help to explain...

2. ### Chemistry

Is it quantitatively acceptable to titrate all KHC8H4O4 samples with the NaOH solution to the same dark red endpoint ?Explain. thank for helping~

3. ### English

Underline each verb phrase. Write the main and helping verbs on the line. 1.You may know about the job of the ghostwriter. main:__ Helping:__ 2.Ghostwriters do not haunt anyone. Main:__ Helping:__

4. ### English

13. When an adverb modifies a verb with a helping verb, the adverb should generally be placed A. before the helping verb. B. after the helping verb. C. at the end of the sentence. D. at the beginning of the sentence. Ms.Sue I just