Answer:
120 pounds
Step-by-step explanation:
1. divide 45 by 15
45 / 15 = 3
2. Each box costs 3 pounds each
3. multiple 3 by 40.
4. 40 x 3 = 120
The reaction times form a straight line with gradient of 60/140 = 3/7 m/kph
Reaction time at 130 kph = 3/7 x 130 = 390/7 = 56 m to nearest whole number
Answer:
y = 3x +21
Step-by-step explanation:
m= 3
The y-intercept of the line that passes through the given point (-7,0) is
0 = -7(3) + b
b= 21
The equation of the line that passes through the given point (-7,0) is
y =mx +b
y = 3x +21
Answer: D
Step-by-step explanation:
