algebra hw helpppp!!!!!!!!!!!!!!!!!!!!!?

Question

Algebra hw plz help!!!?
the length of a rectangle is 5 more than 2 times the width.
the perimeter of the rectangle is 52cm.
what is the length and width of the rectangle?

and....

you have $5.20 in your pocket. there are six times as many nickels in your pocket as there are dimes.
how many dimes and nickels do you have in your pocket?
(convert them into cents while writing equation)
thank you!!

Answer 1

for the first equation, you need to know the perimeter formula of a rectangle which is p=2w+2l right? okay.. then the length is 5+2w right? so you just plug it in the formula above, you will get 52=2w+2(5+2w) right? then you simplify and get 52=2w+10+4w. then you will get 52=6w+10. thn you will get 42=6w and w=7. if width is 7, you plug it back in the length equation the question told you before.. you will get l= 5+2(7) right? that means the length is 19 and the width is 7.

For the second question... let nickels be n and let dimes be d okay? okay.. in total you have 520 cents right? how much are nickels worth? they are worth 5 cents so convert them to 5 cents and convert the word dimes to 10 cents. then you have 5n+10d=520 right? cause you have n number of 5 cents(nickels) and d number of 10 cents (dimes) right? okay.. then the second equation will come from the second sentence of the question. the equation you can make from the sentence is ... d=6n right? cause for every one dime, there are 6 times more nickels or 6 more nickels right? okay.. then in the first equation i made... plug the second one. so you will get 5n+10(6n)=520. you will get 5n+60n=520. 65n=520 right? then n=8. so there are 8 nickels and plug the 8 back into the easier equation which is the second one. you will get d=6(8) right? which is 48 so there are 48 dimes and 8 nickels.

feel free to email me at [e-mail] for further help

Answer 2

1) OK since there are 2 lengths and 2 widths, you have to list all four sides.
(2X +5) +(2X +5) +(x +x) =52
6X +10= 52
6X =52-10
6X =42
X=7

Length is 19 Cm and the width is 6 Cm
7 times 2 =14 +5=19

19+19+7+7= 52


2) X * 6(1/2X) X =.10 (dimes) 1/2 X =.05 (nickels)
X*3X

4X=520

x= 13 dimes or 1.30 1.30
6 times 13 =78 nickels or 3.90 + 3.90
5.20

Answer 3

Let x = width
Then length =2x+5
So 2x+2(2x+5) = 52
2x+4x+10 = 52
6x = 42
x = 7 = width
2x+5 = 19 = length

x= # of dimes
6x = #of nickles
.1x +.05*6x = 5.2
.4x =5.2
x = 5.2/.4 = 13 = dimes
6x = 6*13 = 78 = nickles

Answer 4

x=width
1) 52=(5+2x)+ x

x=dimes
2)5.20=x+ 6x

pretty sure thats right, now u just solve the equations.....u get x and put back in to 5+2x to get length, and put pack in 6x to get nickels

Answer 5

L=22.8cm
W=2.28cm

Answer 6

i would try homework help. many of the indians in india are excellent with math. they have technology to teach you how to do it in real time on your computer. it's fairly inexpensive too. i owuld not just search for answers. i would search for knowledge in how to compute the answers. might be imoprtant to you one day. good luck to you.

Answer 7

130cm
&
26 nickels and

Answer 8

i cant do math but one question isnt school over?