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Misha Larkins [42]
2 years ago
15

What is the value of x, when x2 + 5 = 21? A) 2 or -2 B) 4 or -4 C) 5.5 or -5.5 D) 8 or -8

Mathematics
2 answers:
lord [1]2 years ago
4 0
X would be equal to 8.
notka56 [123]2 years ago
4 0

Answer:

I'm positive that the

answer is B 8

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Can someone help me with 1-4
Lady_Fox [76]

Answer:

For question 1.

Sin B= 3/7

CosB=5/7

Step-by-step explanation:

Sin: opposite over hypotenuse

Cosine: adjacent over hypotenuse

5 0
2 years ago
Is it Exponential distribution? or Geometric distribution?
slava [35]
<span>I believe you use the exponential distribution to find the probability of success (say "p"). Then, you use the Geometric(p) distribution using the "p" you calculated from the exponential as your success probability. Also, in b), you use a negative binomial (which is really just a generalized geometric distribution).

</span><span>Part c) Find the probability to 2 decimal places that the first success occurs in an odd-numbered observation. That is, the first success occurs in the 1st or 3rd or 5th or 7th (and so on) observation.</span>
4 0
2 years ago
A right triangle has side lengths 5, 12, and 13 as shown below. Use these lengths to find cos B, tanB, and sin B. (Plz I need he
n200080 [17]

Answer:

5/13, 12/5, 12/13

Step-by-step explanation:

cos = adj/hyp

tan = opp/adj

sin = opp/hyp

hyp = 13

adj = 5

opp = 12

Plug in.

cos = 5/13

tan = 12/5

sin = 12/13

6 0
3 years ago
Order the numbers from least to greatest: -7/8, 7/4, -15/2, and -13/16
VikaD [51]
-13/16; -7/8; -15/2; 7/4 hope i helped good luck on ur exam :)
8 0
3 years ago
During the course of a 2,185 mile trip, the Archetti's used 5 full tanks of gasoline. The gas tank of their car holds 23 gallons
Pepsi [2]

Okay, let's use some math..

So multiply first..

2.99 * 5 = $14.95 that she has spent on gas..

23 / 5 = 4.6 gallons of gas left..

But this question is asking how much she had spent on gas, so your answer will be..
She has spent $14.95 on gas..

You can correct me if I'm wrong..

I hope this helps you!
6 0
3 years ago
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