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3 years ago

What is the square root of X of the power of 2 -1 =80?

Mathematics

1 answer:

zepelin [54]3 years ago

5 0

Answer:

x=6561

Step-by-step explanation:

We can solve this equation for x to get

$\sqrt{x} -1=80\\\\\sqrt{x} =81\\x=(81)^2\\\\x=6561$

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Find the side of a square whose diagonal measures 15 square root of 2

solmaris [256]

Answer: 15 units .

__________________________________________________

In this case, a square, the two sides of the square (forming a right triangle) are equal), and the "diagonal" forming is the hypotenuse of the right triangle.

In these cases, the measurements of the angles of the right triangle are "45, 45, 90" ; and the measurements of the sides are: "a, a, a√2" ; in which "a√2" is the hypotenuse.

We are given: "15√2" is the hypotenuse" ; and we are given that this is a right triangle of a square with a diagonal length (i.e. "hypotenuse" of "15√2" ; so the measure of the side of the "square" (and other two sides of the triangle formed) is: 15 units. (i.e., 15, 15, 15√2 ).

8 0

3 years ago

Read 2 more answers

A clothing store offers a shirt in 5 colors, in long or short sleeves, with a choice of three different collars. How many ways c

Igoryamba

That is just multiply the number of choices for each
5 colors
2 lengths of sleaves
3 colors

5*2*3=30

answer is 30
C is answer

5 0

3 years ago

Read 2 more answers

On a certain IQ test, eleven people averaged a 101.5. A certain reality TV star took

dem82 [27]

Answer:

59.98

Step-by-step explanation:

To find the average of a set of numbers, we sum them all together and divide them by the size of the set. Here, we start out with 11 IQ scores. We don't know what they are, but we can still set up an equation with the information we do have. Let's call the sum of those 11 score s. The average must be s/11, which we know is 101.5. With that, we can set up and solve and equation for s:

$\dfrac{s}{11}=101.5\\s=101.5(11)\\s=1116.5$

Let's call the score of the reality TV star r. If we add their score to the set, we now have 12 scores. The sum of those scores is gonna be the sum of the previous scores, 1116.5, plus the reality TV star's score, r. To find the average, we divide the sum by 12. Finally, we're told that this average is exactly 98.04. Putting all of this into an equation gives us

$\dfrac{1116.5+r}{12}=98.04$

We can now solve for r algebraically, first by multiplying both sides by 12:

$1116.5+r=98.04(12)\\1116.5+r=1176.48$

And then subtracting 1116.5 from both sides:

$r=1176.48-1116.5\\r=59.98$

6 0

3 years ago

PLEASE HELP IT'S URGENT!!!

Step2247 [10]

Answer:

C. A and C

Both pass by (1,2)

7 0

3 years ago

The probability of rain =0.2, sun=0.3,cloud=0.5. What is the probability of rain and sun over a two day period?

svp [43]

Answer:

0.2752512

Step-by-step explanation:

The formula you are looking for is the binomial probability:

P (X) = ------------ * (P)^X * (q)^n - X

(n- X)! X!

For your particular problem:

n=7

X=2

q = 1-p = .8

7!/(5!*2!)*(.2)^2*(.8)^5 = 0.2752512

Hope this helps, have a nice day/night! :D

6 0

2 years ago