A car accelerates along a straight road, which is 15km long. The car reaches a speed of 75 km/h in 10 s. The average acceleration of the car is Select one:
A. 2.1 m/s ^2
B. 7.5 m/s ^2
C. 1.5 m/s ^2
D. 5.0 m/s ^2

^2 means exponent

answer: a

step-by-step explanation:

10.2 units

answer: i believe the answer is e

step-by-step explanation:

the answer is 13 cm

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -