3/10 × 10 would be 30/100 which would make it easy to add to 21/100 and that would = 51/100
Answer:
No, the student is not correct. The correct expression is 9(n+13).
Step-by-step explanation:
"9 times the sum of a number and 13" means you must multiply 9 by the sum, not just by the number. 9n + 13 would be "the sum of 9 times a number and 13." Slightly different wording.
Answer:
it does not.
Step-by-step explanation:
3(5)-3(4)=15
15-12=15
3=15
A=P(1+r)^t
r=rate in decimal
A=future amount
P=present amount
t=time in years
A=850(1+0.08)^5
A=850(1.08)^5
A=1573.29
7 gallons are needed to cover 1241 square feet.
In this question,
Each gallon of porch and deck paint covers 200 square feet.
To find out how many gallons of paint needs, we have to divide the total area of deck by the amount of deck that one gallon covers.
We use the unitary method to find out how many gallons of paint needs.
Using unitary method,
1241 / 200 = 6.205
However, we cannot buy a fraction of a gallon of paint.
So, the amount of gallons of paint needed is approximately equal to 7 gallons.
Therefore, 7 gallons are needed to cover 1241 square feet.
Learn more about the unitary method here:
brainly.com/question/22056199
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