The answer is B
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<span>The reflection image of R across the y-axis is R'(3, 2)
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Answer:
9 ft
Step-by-step explanation:
Let x represent the shortest piece. Then the sum of lengths is ...
x + (x +25) +3x = 40
5x = 15
x = 3
3x = 9
The third piece is 9 feet long.
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<em>Check</em>
The pieces are 3 ft, 28 ft, 9 ft, so total 40 ft, as required.
<span>use an expression
s = speed of the slower car
then
(s+20) = speed of the faster car
When they meet is after 400 miles
Write distance equation
slow car d + fast car d = 400 mi
4s + 4(s+20) = 400
8s + 80 = 400
8s = 400 - 80
8s = 320
s = 40 m/H</span>
