Question

Julius has a garden that has dimensions of 12 ft by 20 ft. Julius needs more room to plant some peppers, and determines the garden will need a new area of 360 square feet. How much should he increase the length and width by, if he wants to increase them by the same amount? Round your answer to the nearest tenth.
A.
3.8 feet
B.
3.6 feet
C.
3.4 feet
D.
35.4 feet

Answer 1

Well you can determine the current area with 12(20) = 240
Then you can add the choices to the length and width to calculate 360

Answer 2

For example, let's try option A
(12+3.8)(20+3.8) = ?

Answer 3

ok

Answer 4

its not A.

Answer 5

KIrbyLegs method is a good one

Answer 6

alright

Answer 7

You can then try B and C now
(12+3.6)(20+3.6) = ?
(12+3.4)(20+3.4) = ?
Thx cwrw. The only problem is that it is playing with the multiple choice answers

Answer 8

thanks

Answer 9

right kirby

Answer 10

another way to do it would be to solve the equation
(12 + x)(20 + x) = 360
expand and rearrange to get 0 on RHS
and solve using the quadratic formula