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If you're looking to get the actual number with it's decimals, I unfortunately can't help you there :( However, if you're looking for the square root of 91 in it's simplest radical form, it's already in it's simplest radical form! :)

Thie guest appears to be correct

Number  of possible  sets formed by choosing two cubes from four  = C(4, 2)   =  6

Number  of possible sets of choosing  two squares from sixty-four  =  C(64,2)  =  2016

Probability  =     6  / 2016    =    1   / 336 

Expected value  =   (4/20)(0)  +  (7/20)(1)  +  ( 9/20)(2)  =  1.25  persons per  room

f(x)  is y     y is the dependent variable....it depends on the value of 'x'

f(x) = y = mx + b     m is the slope   b is the y intercept (this occurs when x = 0....this is th value on the y axis when x = 0)

f(x) = y = -3/2 x + 5           slope is   rise / run     the Q tells you the value rises -3  for a run of 2     slope = -3/2

Summary:  slope  -3/2   y intercept (put in x=0) = 5     x intercept (put in y = 0) = 10/3

Here is the graph:

https://www.desmos.com/calculator/1utifuizrl

a + b + c = 7 + 4 + 2 = 13.

a) The answer is 2x - 2y.

b) The answer is 2x - 3y.

The measure of minor arc AK is 122 degrees.

The probability that there are at least two girls on the committee is 3/8.

The largest integer that must be a divisor of b is 18.

y = length of hair in cm    starting at 10cm

x = months

y = 1.25 x + 10         slope = 1.25    y intercept is when x = 0 and is given as 10 cm

1.25 cm/month / 2.54  cm/inch =~ 1/2 inch/month

Here is the graph:

In isosceles right triangle $ABC$, point $D$ is on hypotenuse $\overline{BC}$ such that $\overline{AD}$ is an altitude of $\triangle ABC$ and $DC = 5$. What is the area of triangle $ABC$?

Sorry i cant help im only a 6th grader :/ hope you find help soon tho

4 ^{log ₂ x}   +   x^2  =   8           we can write

(2^2)^(log₂ x)  + x^2  =  8

2^(2 log ₂x)  +  x^2   = 8

2^( log ₂ x^2)  + x^2  =  8

[ Note that we have the property that    a ^ (log _a  b^2)  =  b^2   ]

x^2   + x^2   =   8

2x^2  =  8                  divide both sides by 2

x^2  =  4                take the positive root

x   = 2

x^2 ( y + z)   + y^2 ( x + z)  + z^2 ( x + y)  =  6

(x^2y + x^2z + xy^2 + zy^2  + xz^2 + yz^2)  =  6

(x + y + z)(xy + xz + yz)   =  18

x^2y + x^2z + xyz + xy^2 + xyz + y^2z + xyz + xz^2 + yz^2   = 18

(x^2y  + x^2z + xy^2  + zy^2 + xz^2 + yz^2)   +  3xyz  =  18

(6)   +  3xyz    =  18

3xyz  =    12

xyz  =  4

he he, i got yer imagine swingin' ...  

This question is German, or deutsch

From inspection it's clear that x = 2 satisfies the equation.

1. The probability is 1/2.

2. Sin(-theta) = 4/3.

3. tan(x + pi) = 5/2.

The solutions are x = -2, x = 1, and x = 2.

xyz = 14.

The new coordinates of C are (20,6).

These are the first 64 "perfect squares":
(1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900, 961, 1024, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 2304, 2401, 2500, 2601, 2704, 2809, 2916, 3025, 3136, 3249, 3364, 3481, 3600, 3721, 3844, 3969, 4096).

Of the above 64, there are 4 cubes:1, 64, 729, 4096.
The probability that the first number is a cube is:
4/64 =1 / 16
The probability that the 2nd is also a cube is:
3/63 =1 / 21
Then the probability that both are cubes is:
1/16  x  1/21 =1 / 336
P.S. Somebody should check this, please. Thanks.