A contractor charges $1,200 for 100 square feet of roofing installed. At this rate, how much does it cost to have 1,100 square feet installed?
darknesssecret750 avatar

Answers

Answer 1
Answer:

Answer: $13200

Step-by-step explanation:

If 100 square feet of roofing is installed for a cost of $1,200

1,100 square feet would cost $Z (let the unknown cost be Z)

i.e 100 ft^2 = $1,200

1100 ft^2 = $Z

Hence, to get the value of Z, cross multiply

Z x 100 = 1200 x 1100

100Z = 130000

Divide both sides by Z

100Z/100 = 1320000/100

Z = $13200

Thus, $13200 is the cost to have 1,100 square feet of roofing sheet installed


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Brandon bought some stamps. After he gave n stamps to each of his 4 friends, He had 10 stamps left. How many stamps he buy?Total number of stamps he gave to his friends = 4 x n

= ?

Number of remaining stamps = 10
Total number of stamps = ?
Brandon bought __ stamps.

Answers

Answer:

Total number of stamps he gave to his friends = 4 x n = ?

Number of remaining stamps = 10

Total number of stamps = 4n + 10

Brandon bought 4n + 10 stamps.

There must be one value extra to solve this

Answer:

Total number of stamps he gave to his friends = 4 x n = ?

Number of remaining stamps = 10

Total number of stamps = 4n + 10

Brandon bought 4n + 10 stamps.

Step-by-step explanation:

How do you write
.5
.66
.7
as a fraction?

Answers

ok remember
1st decimal place=tenths=x/10
2nd=hundreths=x/100
3rd=thoustands=x/1000
each place adds a zero

0.5
5 is in tenths place so 5 tenths aka 5/10=1/2


0.66 goes to hundreths so 66/100=33/50


0.7 is also in tenths so 7/10

Peter is reading a 193-page book. He has read three pages more than one fourth of the number of pages he hasnt yet read. How many pages has he not yet read? Estimate how many days it will take Peter to finish the book if he reads about 8 pages per day.

Answers

Let n = the number of pages not read
Then the number of pages read = n/4 + 3
Since the total number of pages is 193, we have

n + n/4 + 3 = 193
5n/4 = 190
n = 152
At 8 pages per day it will take 152 pages/ 8 pages/day = 19 days

James lives 3.42 kilometers from school. Megan lives 0.76 kilometers from school. The distance James lives from school is how many times as long as the distance Megan lives from school? Show your work.

Answers

Divide 3.42 by 0.76 to equal 4.5 or

3.42 / 0.76 = 4.5

Therefore, James lives 4.5 times the distance Megan lives from the school.

What is the percent of 9 out of 106

Answers

1. i assume, that the number 106 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 106, so we can write it down as 100%=106.
4. We know, that x% equals 9 of the output value, so i can write it down as x%=9.
5. Now we have two simple equations:
1) 100%=106
2) x%=9
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=106/9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 9 is what percent of 106

100%/x%=106/9
(100/x)*x=(106/9)*x       - i multiply both sides of the equation by x
100=11.7777777778*x       - i divide both sides of the equation by (11.7777777778) to get x
100/11.7777777778=x
8.49056603774=x
x=8.49056603774

now the answer is
9 is 8.49056603774% of 106
=9/106×100
=900÷106
=8.49 R 8.5

Really need the answers. thanks!!!

Answers

should be 4.9/3*5 which equals 8.16666666667
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