A person can run 100 meters in 20 seconds. What is his running speed in kilometers per hour (km/h)?

A. 18 km/h

B. 20 km/h

C. 24 km/h

D. 15 km/h

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 -

the answer is 15.50 for one mile

b) is slope: 0   y- intercept 15.5

152 thatbk ypi vjsl b abjb uoabr

answer is b 270°

i got it down for you chief.