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3 years ago

X2 = 121 Please HELP!!!

Mathematics

2 answers:

Romashka-Z-Leto [24]3 years ago

6 0

Answer:

if you're looking for the value of x, the answer is 60.5

Step-by-step explanation:

2x=121

You divide 121 and 2x by 2 to cancel it out and you get 60.5

Allushta [10]3 years ago

3 0

The answer will be
x=root 121
x=11

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Sloan [31]

Answer:

The probability that 10 or more students will live in campus housing is approximately 0.111%

Step-by-step explanation:

Binomial distribution formula:

If the probability of success is $p$ , then the probability of $r$ successes out of $n$ trials will be: $^nC_{r}(p)^r(1-p)^n^-^r$

26% of college students live in campus housing. So here, $p= 26\%= 0.26$

A random sample of 15 college students is selected. So, $n= 15$

Now, "10 or more students" means 10 or 11 or 12 or 13 or 14 or 15 students. That means, $r= 10, 11, 12, 13, 14, 15$

Thus, the probability that 10 or more students will live in campus housing will be........

$[^1^5C_{10}(0.26)^1^0(1-0.26)^5]+[^1^5C_{11}(0.26)^1^1(1-0.26)^4]+[^1^5C_{12}(0.26)^1^2(1-0.26)^3]+[^1^5C_{13}(0.26)^1^3(1-0.26)^2]+[^1^5C_{14}(0.26)^1^4(1-0.26)^1]+[^1^5C_{15}(0.26)^1^5(1-0.26)^0]\\ \\ = 0.00094...+0.00015...+0.00001...+ 0.0000014...+ 0.000000071...+0.0000000016...\\ \\ =0.00111002... =0.111002...\% \approx 0.111\%$

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3 years ago

What is the slope of (16,9), (17,9)

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Answer:

Step-by-step explanation:

It's a horizontal line, it has no slope.

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3 years ago

Please help meee and explain specifically!!

vfiekz [6]

An isosceles triangle is when 2 angles are the same measure. an triangles angle equal to 180 degrees. therefore angle A is 80 degrees as well as angle B equals 80 degrees. since the angles of a triangle equal to 180 you subtract the two known angles to find angle C. So 180-80-80 which equals to 20.

Therefore angle C=20 degrees

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3 years ago

15 POINTS: A motorboat traveling downstream covers the distance between port M and port N in 6 hours. Once, the motorboat stoppe

pav-90 [236]

Answer: S=18

Step-by-step explanation:

D = distance between M and N

S = speed of the boat

S + 2 = speed down streem

S - 2 = speed upstream

T = time on the downstream leg until the boat made its turn

9-T= time on the upstream leg

6(S + 2) = D

T (S + 2) = D - 40

(9-T)(S-2) = D - 40

now we have 3 equations and 3 uknowns

lets multply everything out

6S + 12 = D

ST + 2T = D - 40

9S - 18 - ST + 2T = D - 40

add the second 2 together to get rid of the ST term

9S - 18 + 4T = 2D - 80

and lest subtract them from one annother

2ST - 9S + 18 = 0

if we can find T in terms of S we will have a quadratic equation, and will be able to use the quadratic formula / factor

9S - 18 + 4T = 2(6S + 12) - 80

9S - 18 + 4T = 12 S + 24 - 80

4T = 3S - 38

T = 0.75 S - 9.5

2S(0.75 S - 9.5) - 9S + 18 = 0

1.5 S^2 - 28 S + 18 = 0

S = 18, 2/3

now it doesn't make sense for S to equal -2/3 as it suggests the boat moves backward when it is going up stream. (and that it travels downstream for negative time)

S = 18

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3 years ago

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SCORPION-xisa [38]

Answer:

The quadratic equation is: $y=x^2-36$

Step-by-step explanation:

If the roots of the quadratic equation are "-6" and "6", then it must have the following factors: $(x+6)\,\, and \,\,(x-6)$

Therefore, we can write the equation in factor form as:

$y=a\,(x+6)\,(x-6)$

where a is a real number constant factor. Now, this equation in standard form will look like:

$y=a\,(x^2+6x-6x-6^2)=a\,(x^2-36)=ax^2-36\,a$

Therefore, using the information about the leading coefficient being "1" (one), we derive that the constant factor $a$ must be "1". The final expression for the quadratic becomes:

$y=x^2-36$

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4 years ago