Solve problems number 78 and 80

Algebra
Tutor: None Selected Time limit: 1 Day

Apr 13th, 2015

78)  combine logs to get

log2(x+7 / x) = 3

Then,

x+7 / x = 2^3 = 8

8x = x + 7

7x = 7

x = 1

80)  L = 2W

Perimeter = 2L + 2W

substitute L with 2W to get

66 = 2(2W) + 2W

66 = 4W + 2W = 6W

W = 11

L = 22

Apr 13th, 2015

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Apr 13th, 2015
...
Apr 13th, 2015
May 22nd, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer