Question

ASAP please!!!!

Answer 1

Answer:

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

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

Step-by-step explanation:

Part a

Given:

$a=17$ and $b = 9$

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

Put a, b value in given expression

$=3\times 17+4\times 9$

$=51+36$

$=87$

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

$v= u + at$

$v= 3 + 1.5\times 7$

$v= 3 + 10.5$

$v= 13.5m/s$

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