Answer:
C. $45
Step-by-step explanation:
Becca: in 1 hour;
(3(3/4) miles in 1/2 hour)2
=7.5 miles in 1 hour
Alice: in 1 hour;
(5(1/4) miles in 3/4 hours)
She travels 5(1/4)/3 = 1.75 miles in 1/4 hours.
Travels 1.75x4 = 7 miles in 1 hour
As seen, Becca runs faster, 0.5 miles per hour faster.
Hope I helped :)
Answer:
1. 36 rocks in total.
2. 15 purple rocks more than blue rocks
Step-by-step explanation:
1. Purple rocks are 
of all rocks, then the remainder is 
of all rocks.
2. Blue rocks are 
of the remainder, then blue rocks are
of all rocks.
3. Silver rocks are the rest, that is
of all rocks.
4. It is known that the number of silver rocks is 3, then if x is the number of all rocks, 
of x is 3:
Hannah has 36 rocks in total. 3 of them are silver, 
are blue and 
are purple. Then she has 
more purple rocks than blue.
Answer:
No.
Step-by-step explanation:
By having different sizes of test populations, the answers will be skewed and therefore incorrect.
Answer:
A little less than 5.
Step-by-step explanation:
An estimate means you should be able to do it in your head.
400/80 = 5 So the answer should be about 5
Can we get it a little closer? Maybe.
Divide 375 in your head by 25. It's about 15
Divide 80 by 25 which is about 3.2
15/3.2 It's under 5. but not by much. Only now can you use a calculator. The rounded answer is 4.6
