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solniwko [45]
3 years ago
11

Factor Completely. x^4-81

Mathematics
1 answer:
worty [1.4K]3 years ago
4 0
(x^4+9)(x+3)(x-3) ; I hope this helps!!
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A student scored 66,87,and 97 on three algebra tests. What must he score on the fourth test in order to have an average grade of
adoni [48]

Answer:66,97

Step-by-step explanation:

8 0
3 years ago
Jan has a job selling magazine subscriptions by phone. She makes a base salary of $9.60 per hour plus a 5% commission on
blagie [28]

Answer:

$597.50

Step-by-step explanation:

(9.60x35)+(5230x.05)

336+261.50

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3 years ago
A carnival game has the possibility of scoring 50 points, 75 points, or 150 points per turn. The probability of scoring 50 point
MariettaO [177]

Answer:

The game’s expected value of points earned for a turn is 71.

Step-by-step explanation:

Here we know that:

Points     Frequency

50           55

75            32

150          13

Here points earned is a random variable.

We need to find its expected value,

Finding Expected value:

Expected value of a random variable is its mean value. So we will first find the mean value of points earned per turn from the table we are given.

Total number of turns = sum of frequencies

= 55 + 32 + 14 = 100

Total points earned = 50(55) + 75(32) + 150(13)

= 7100

Expected value of points earned for a turn = Mean value of points

= Total points/no. of turns

= 7100/100

= 71

8 0
3 years ago
Describe 58 as a sum of ten and ones
maxonik [38]
5 tens 8 one :)
would be the answer for the question above
8 0
2 years ago
Read 2 more answers
Based on Pythagorean identities, which equation is true? sine squared theta minus 1 = cosine squared theta secant squared theta
Naddik [55]

Answer:

Cot^2\theta-Csc^2\theta=-1

Step-by-step explanation:

The only Pythagorean identities are:

1. \ Sin^2\theta+Cos^2\theta=1

2. \ 1+Tan^2\theta=Sec^2\theta

3. \ 1+Cot^2\theta=Csc^2\theta

4. \ Sin^2\theta=1-Cos^2\theta\\  \ \ Cos^2\theta=1-Sin^2\theta

 

Therefore,Cot^2\theta-Csc^2\theta=-1 is correct as it's one of the pythagorean identities.

4 0
3 years ago
Read 2 more answers
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