5a-11 ≥ 2a-5 (subtract 2a from both sides)
3a-11 ≥ -5 (add 11 to both sides)
3a ≥ 6 (divide by 3 on both sides)
a ≥ 2
11. 220.5=7^2×w
4.5=w
12. 532=19×1.75×w
28=1.75×w
16=w
Answer: Option a.
Step-by-step explanation:
To solve the given exercise, you must keep on mind the law of logarithms shown below:

Therefore, by applying the law , you can rewrite the expression given, as following:

You know that:

Then, when you substitute values, you obtain:

100 inches is the correct answer for this question
Answer:
5.209 or A
Step-by-step explanation
5^x-4=7
reserve 4
log sides
x-4 log5 and log7
x-4=log7/log5
+4 or number of your equation
x=log5/log7 +4
use calculator
get answer
5.209
EDIT: Got a 100 on the test this is correct