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pentagon [3]
3 years ago
5

Evaluate each expression for a = -4, b = 3, and c = 2. 4a²b-23

Mathematics
1 answer:
aleksklad [387]3 years ago
4 0

Answer: -215

Please give brainliest

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a volley ball player servers the ball. The ball follows a path given by the equation y=-0.01x^2+0.5x+3 where x and y are measure
dolphi86 [110]

Answer:

(a)

Distance from player should be 13.82 feet or 36.2 feet

(b)

The ball will go over the net

Step-by-step explanation:

we are given

The ball follows a path given by the equation

y=-0.01x^2+0.5x+3

where

x and y are measured in feet and the origin is on the court directly below where the player hits the ball

(a)

net height is 8 ft

so, we can set y=8

and then we can solve for x

8=-0.01x^2+0.5x+3

8\cdot \:100=-0.01x^2\cdot \:100+0.5x\cdot \:100+3\cdot \:100

800=-x^2+50x+300

-x^2+50x-500=0

x^2-50x+500=0

we can use quadratic formula

x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

x=\frac{-50\pm \sqrt{50^2-4\left(-1\right)\left(-500\right)}}{2\left(-1\right)}

x=5\left(5-\sqrt{5}\right),\:x=5\left(5+\sqrt{5}\right)

x=13.82,x=36.2

So, distance from player should be 13.82 feet or 36.2 feet

(b)

we can plug x=30 and check whether y=8 ft

y=-0.01(30)^2+0.5(30)+3

y=9ft

we know that

height of net is 8 ft

so, the ball will go over the net


5 0
3 years ago
Solve for m .<br> 3m = 9
Rzqust [24]

Answer:

3

Step-by-step explanation:

9÷3=3 so the answer is 3 and you can check by doing 3×3=9

6 0
3 years ago
tingnan ang pattern.isulat sa sagutang papel ang nawawalang bilang. 1._1000_2000,3000 2.6330,6333,_6336_6339 3.650_750_850,950 4
storchak [24]
I am confused but ummm I think the answer is 1
3 0
3 years ago
Solve the inequality <br> Need help quick
Alecsey [184]

Answer:

x>1

Step-by-step explanation:

move the constant to the right side and change its sign 7x>10-3

Then subtract the numbers 7x>7

Then divide the inequality by 7 from for both sides.

x>1

4 0
3 years ago
PLEASE HELP QUICK ITS ALMOST DUE!
konstantin123 [22]
if you start at the point (0,1), you are going to go up and over to (-2,4), which means you will go up 3 and to the left, which means negative, 2
rise/run
3/-2
4 0
3 years ago
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