In standard form: (x+5)(3x-1)-(x-4)^2

Mathematics

2 answers:

denpristay [2]3 years ago

6 0

I hope this helps you

x.3x+x.(-1)+5.3x+5.(-1)-(x^2-2.4.x+16)

3x^2-x+15x-5-x^2+8x-16

2x^2+22x-21

Minchanka [31]3 years ago

5 0

Basically, expand
expand them seperately to reduce confusion
exponent first
(x-4)^2=(x-4)(x-4)=x²-4x-4x+16=x²-8x+16

(x+5)(3x-1)=3x²+15x-x-5=3x²+14x-5

3x²+14x-5-(x²-8x+16)
3x²+14x-5-x²+8x-16
3x²-x²+14x+8x-5-16
2x²+22x-21

answer is
2x²+22x-21

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1) Jack is rolling a number cube. What is the probability that he will roll a 4? Write your answer as a fraction, decimal and eq

Alja [10]

Answer:

Look below!

Step-by-step explanation:

1A (fraction): 1/6

1B (decimal): 0.16 (6 continues)

1C (percent): 16.66 (6 continues)

5+15+7+8+10+15=60

10/60 time she got 5

1/6 chance she gets a 5 again

2A (fraction): 1/6

2B (decimal): 0.16 (6 continues)

2C (percent): 16.66 (6 continues)

Yellow: 3/10 chance

Red: 1/5 chance

Blue: 2/5 chance

Pink: 0/20 chance

You're welcome in advance.

8 0

4 years ago

9. Find the dimensions of the<br>4 triangular faces of the pyramid.<br>(Height is 55.5 ft)<br>

Minchanka [31]

Answer:

$Q=\frac{\pi}{2}*55.5ft=87.18ft\\P=87.18ft*\sqrt{\frac{1}{2}+\frac{16}{\pi ^{2}}}=87.18*0.9515=82.95ft\\$

Step-by-step explanation:

We have a 4-sided triangular pyramid , where

$Q=\frac{\pi}{2}*H\\P=Q*\sqrt{\frac{1}{2}+\frac{4}{\pi ^{2}}}\\Q=\frac{\pi}{2}*55.5ft=87.18ft\\P=87.18ft*\sqrt{\frac{1}{2}+\frac{16}{\pi ^{2}}}=87.18*0.9515=82.95ft\\$