A) 4(25-3y)+5y=9
100-7y=9
   91=7y
   y=13
(-14,13)

b) 14-x=x-10
   2x=24
   x=12
(12,14)

c) 4x=12
  (3,7)

d) 18.5x+10.4y=200
   x+y=130

7 0

3 years ago

Jenny and Lester are running the 100 meter dash. Jenny completes it in 15.2 seconds and Lester completed it in 15.7 seconds. Wha

matrenka [14]

Jenny won the race as she finished the race much more quickly and has greater average speed than Lester.

$\sf \boxed{\sf speed:\frac{distance}{time \ taken} }$

Jenny: distance/time = 100/15.2 = 6.58 m/s = 6.6 m/s

Lester: distance/time = 100/15.7 = 6.37 m/s = 6.4 m/s

3 0

2 years ago

What is the solution set for 6x−9=15, given the replacement set {0, 1, 2, 3, 4}?

vfiekz [6]

6x-9=15
6x=24
x=4
Therefore the answer is A.

Hope this helps :)

6 0

3 years ago

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