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.
Original Ratio of 1 in = 7 ft so 3 in = 21 ft
Now, New ratio 1 in = x ft so 3 in = 27ft
1/x = 3/27
cross multiply a/b = c/d ad = bc
1/x = 3/27
3x = 27
x = 9
1 in represents 9 ft
Answer:
40
Step-by-step explanation:
Let the numbers be 2x and 3x
Then their L.C.M. = 6x
BUT also their LCM=48
6x=48
x=48/6
x=8
So,
First number=2x=2x8=16
Second number=3x=3x8=24
The numbers are 16 and 24.
Hence required sum =(16+24)=40
So none of the options are correct
Answer:
172.7 ft²
Step-by-step explanation:
Fencepost = Cylinder
Cylinder surface area : A = 2πrh + 2πr²
Cylinder surface area : A = 2 (3.14 × 0.5ft × 5ft) + 2 (3.14 × 0.5²ft) =
15.7 + 1.57 = 17.27 ft²
17.27 ft² × 10 = 172.7 ft²
Answer:
x = 3, y = -8
x = 4, y = -5
x = 5, y = -2
x = 6, y = 1
Step-by-step explanation:
You can apply the equation y = 3x - 17 for the different values for x.
x = 3
y = 3(3) - 17
= 9 - 17
= -8
x = 4
y = 3(4) - 17
= 12 - 17
= -5
x = 5
y = 3(5) - 17
= 15 - 17
= -2
x = 6
y = 3(6) - 17
= 18 - 17
= 1
