Answer:
Step-by-step explanation:
1.
Shirts cost $20 each and ties cost $12 each.
<u>Expression for the cost:</u>
Correct choice is B
2.
<u>An expression that represents 40% of a number is:</u>
Correct choice is B. False
3.
t = -2, x = 3 and z = 5
- 4z + 3x − t =
- 4*5 + 3*3 - (-2) =
- 20 + 9 + 2 =
- 31
Correct choice is C. 31
You would have to divide 105 by 7 and get an answer then you times that answer by nine and get your answer
Answer:
4 km per hour and 6 km per hour.
Step-by-step explanation:
The combined running rate = 30/3 = 10 km/h.
If one runner's speed = x then the other one's speed is x+2 km/h.
So x + x + 2 = 10
2x = 8
x = 4
So one runs at 4 km/h and the other at 6 km/h.
Width = W
Length = 3 times w = 3W
Area = length x width = 3W * W = 3W^2
