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  • one year ago

can someone help with these two questions...I will give medals and fan..? 7. The perimeter of a rectangle is 50 feet and its area is 154 feet. What are the dimensions of the rectangle? 8. Stephanie is a very good soccer player. She can kick a soccer ball with an initial velocity of 21.3 m/sec. The function that represents the height of the ball with respect to time is β„Ž π‘₯ = βˆ’4.9π‘₯2 + 21.3π‘₯. About how many seconds will it take for the ball to hit the ground?

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  1. saylilbaby
    • one year ago
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    @Awolflover1 @pooja195 @AngusV @Preetha @robtobey

  2. Vocaloid
    • one year ago
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    for the first one: area = length*width and perimeter = 2(length+width) we know that area = 154 = l*w, we can solve this equation for w by dividing both sides by l 154/l = w then, you can substitute this for w in the perimeter equation to find w, then use the area equation to find l for the second one: h(x) = βˆ’4.9π‘₯2 + 21.3π‘₯ when the ball is on the ground, that means h(x) = 0 (height = 0) so, to find the time it takes for the ball to reach the ground, set h(x) = 0 and solve for x one of the x values will be 0 and the other x value will be your answer

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