Answer: Jim can lay 25 tiles per hour.
Step-by-step explanation:
Let be "x" Jim's rate and "y" Pete's rate.
We know that Jim completed half the floor in 4 hours, then:
And Pete completed the other half of the floor in 2 hours, then:
Since Jim completed half the floor and Pete completed the other half:
[Equation 1]
We also know that Pete can lay 25 more tiles per hour than Jim, then:
[Equation 2]
Then, we can substitute Equation 2 into Equation 1 and solve for "x":
Therefore, Jim can lay 25 tiles per hour.
Answer:
D. 25a² +60a +36
Step-by-step explanation:
You have memorized the form ...
(p +q)² = p² +2pq +q²
so you can write down immediately the result for p=5a and q=6:
(5a)² +2(5a)(6) +6² = 25a² +60a +36
Answer: -4x+2
Step-by-step explanation: Simplify
Answers are:
Choice D) more than 102
Choice E) between 90 and 102 messages
Choice F) less than 78
So there are three answers here
The reason for choice D is that 25% of the values are above Q3 (third quartile) which is 102 in this case. Take 25% of 100 to get 25. So there are 25 people who send more than 102 messages
The reason for choice E is that 25% of the data is between the median and Q3.
The reason for choice F is similar to choice D. Twenty five percent of the data values are smaller than Q1 (first quartile) which is 78.
Change all mixed numbers to improper fractions. Invert (flip) the second fraction, placing the bottom number on top and the top number on the bottom; then change the division symbol to a multiplication symbol. Multiply the fractions, and reduce if necessary.