Answer:

Step-by-step explanation:




Answer:
79 feet per second
Step-by-step explanation:
Convention: upwards positive
s = ut + 0.5at²
94 = 2u + 0.5(-32)(2²)
2u = 158
u = 79 feet/second
The answer is two an a half litres
2. - Kevins average speed is 67.5 mph
The proportionality constant "k" is 1.88
<h3><u>Solution:</u></h3>
Given that y varies directly with x
y = 15 when x = 8
To find: proportionality constant "k"
Direct variation means that increase/decrease in one quantity also causes increase/decrease in other quantity.
⇒ y varies directly with x
This means,

Can also be written as:
y = kx
Where "k" is the proportionality constant
Substituting the given values of "x" and "y"
15 = k(8)

k = 1.875
On rounding to nearest hundredths place we get 1.88
Thus the proportionality constant is 1.88