Question

ASAP please!!!!

a) Find the value of 3a + 4b when a = 17 and b = 9.
b) Use the formula v= u + at to find the velocity, when
• the initial velocity is 3 m/s
• the acceleration is 1.5 m/s?
• the time is 7 seconds

Answer 1

a) The value of
`3a+4b=87`

b) The velocity is
`v= 13.5m/s`.

Explanation:

Part a

Given:

`a=17` and
`b = 9`

Find the value of given expression =
`3a+4b`

Put a, b value in given expression

`=3* 17+4* 9`

`=51+36`

`=87`

The value of
`3a+4b=87`

Part b

Given:

the initial velocity is
`u=3m/s`

the acceleration is
`a=1.5m/s^(2)`

the time is
`t=7` seconds

The given formula
`v= u + at` to find the velocity.

where
`a=acceleration`,

u = initial velocity

t = time

Put all the value in given velocity formula

`v= u + at`

`v= 3 + 1.5* 7`

`v= 3 + 10.5`

`v= 13.5m/s`

Therefore, the velocity is
`v= 13.5m/s`.