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4 years ago

Which method is most effective? x^2−1=15

Mathematics

1 answer:

juin [17]4 years ago

7 0

Step-by-step explanation:

b.square root

x²-1=15

x²=16

square root on both side

x±4

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B. Convert quarts to gallons.

jeyben [28]

Answer:

There are 4 quarts in one gallon. 36 divided by 4 is 9 gallons.

Step-by-step explanation:

9 gallons.

5 0

3 years ago

 (6 pts) The average age of CEOs is 56 years. Assume the variable is normally distributed. If the SD is four years, find the pr

Alenkinab [10]

Answer:

The probability that the age of a randomly selected CEO will be between 50 and 55 years old is 0.334.

Step-by-step explanation:

We have a normal distribution with mean=56 years and s.d.=4 years.

We have to calculate the probability that a randomly selected CEO have an age between 50 and 55.

We have to calculate the z-value for 50 and 55.

For x=50:

$z=\frac{x-\mu}{\sigma}=\frac{50-56}{4}=\frac{-6}{4}= -1.5$

For x=55:

$z=\frac{x-\mu}{\sigma}=\frac{55-56}{4}=\frac{-1}{4}=-0.25$

The probability of being between 50 and 55 years is equal to the difference between the probability of being under 55 years and the probability of being under 50 years:

$P(50$

5 0

3 years ago

What is the area of the shaded part of the figure below?

DanielleElmas [232]

Answer:

192 i think

Step-by-step explanation:

8 0

3 years ago

PLEASE ANSWER!!!

marin [14]

Step-by-step explanation:

(10-0) ÷ (27-0) = x ÷ y

10 ÷ 27 = x ÷ y

27x = 10y

2,7x = y

The third one

8 0

3 years ago

Read 2 more answers

(Brainliest) PLEASE HELPP MEEE

zloy xaker [14]

Answer:

1. According to the angle bisector theorem, DAC = BAC

2. Same kind of goes for BC

3. X must be equal in both equations. x= 3

9(3) -7 = 20

4(3) +8 = 20

Hope this helped!

8 0

3 years ago