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SOVA2 [1]
3 years ago
12

Factor completely 5x2 − 5x − 100.

Mathematics
1 answer:
Rama09 [41]3 years ago
4 0
First, factor out 5:
5 (x² -x -20)
We need two numbers that add to -1 and multiply to -20. -5 and 4 satisfy this.
5(x-5)(x+4)
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Two balls are drawn in succession out of a box containing 2 red and 5 white balls. Find the probability that at least one ball w
olga_2 [115]
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➷ A) (2/7 x 2/7) + (2/7 x 5/7) + (5/7 x 2/7) =

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2/42 + 10/42 + 10/42 = 22/42 <== this is the answer

The second answer could be simplified to 11/21 (only write this answer if it wants the simplified version, otherwise write the one above)

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5 0
4 years ago
What is the length of a side of the cube shown with given volume?
tekilochka [14]

。☆✼★ ━━━━━━━━━━━━━━━  ☾

Cube root the value:

Answer = 9 ft

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volume = l x w x h

volume = 9 x 9 x 9

volume = 729

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7 0
3 years ago
A dolphin jumps from the water at an initial velocity of 16 feet per second. The equation h + -16t^2 + 80t models the dolphin's
Dominik [7]

Answer:

100feet

Step-by-step explanation:

Given the height reached by a dolphin expressed by the equation is h = -16t^2 + 80t. At maximum height, the velocity is zero, hence;

v(t) = dh/dt = -32t + 80

0 = -32t + 80

32t = 80

t = 80/32

t = 2.5secs

Substitute t = 2.5 into the height formula h = -16t^2 + 80t

h = -16(2.5)^2 + 80(2.5)

h = -100+200

h = 100feet

Hence  the maximum height the dolphin jumps is 100feet

3 0
3 years ago
PLEASE EXPLAIN WHAT THESE MEAN- WORTH 30 POINTS AND ILL GIVE BRAINLIEST
Keith_Richards [23]

Answer:

Where is The question at? O_O

4 0
3 years ago
Can someone help explain this to me?​
o-na [289]

Step-by-step explanation:

A. y-5=-4x+4

y=-4x+4+5

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(0,9)(9/4,0)

8 0
3 years ago
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