4b+3s=72
6b+3s=96
Multiply the second equation by -1
-6b-3s=-96
Now you can cross out the +3s -3s
-2b=-24
Divide both sides by -2
b=12
s=8
So blouses cost $12 each and skirts cost $8 each
Question: Which of the following is NOT true when testing a claim about a proportion?
Answer: A conclusion based on a confidence interval estimate will be the same as a conclusion based on a hypothesis test.
I don't really know the answer choices, but I think that's right. Sorry if not.
Hope this helps. c;
Answer:
8 hours
Step-by-step explanation:
Step one:
Given data
Tom earned $72 walking dogs for 6 hours
amount earned = $72
time taken = 6 hours
Required
The time taken to earn $96
Step two:
let us find the unit rate of his earning
unit rate = 72/6
= 12 per hour
In 1 hour Tom earns $12
in x hours he will earn $96
cross multiply we have
96*1= 12x
divide both sides by 12
x= 96/12
x=8 hours
Answer:
Step-by-step explanation:
Given
Sample Space = 10 to 99
First, we calculate the sample size (n)
Solving (a): P(32)
In 10 to 99, there is only 1 32.
So,
Solving (b): P(Odd)
There are 45 odd numbers between 10 and 99
i.e.
So:
Solving (c): P(Multiple of 5)
There are 18 multiples of 5 between 10 and 99
i.e
