MATHEMATICS
HIGH SCHOOL

Answer: -2 * 11 = -22 so that's the first part and -2+5 =3 so the numbers are -2,11,and -2,5

COLLEGE

A population has a mean of 200 and a standard deviation of 50. Suppose a sample of size 100 is selected. What is the probability that the sample mean will be within LaTeX: \pm±10 of the population mean?

Answer: 0.9544

Step-by-step explanation:

As per given have ,

Population mean :

Standard deviation :

Sample size : n= 100

We assume that the population is normally distributed.

Let be the sample mean.

Now , the probability that the sample mean will be within ±10 of the population mean will be :-

Hence, the required probability is 0.9544.

MIDDLE SCHOOL

What number is the product of two different prime numbers greater than 7

So just take 2 prime numbers that are greater than 7 and multiply them gotoeher prime numbers can be evenly divided by 1 and themselves 9 is not prime becuase it can be divided by3 and get 3 11 is prime becua seit can be only divided by 11 so some numbers prime that are greater than 7 11,13,17,19 let's pick the smaller ones for easy multipy 11 times 13=143 one such number is 143

MIDDLE SCHOOL

a satellite moves at a speed of about 27,000 kilometers per hour.write four numbers that could be the actual speed of the satellite

Pie is my answer. Or dose have to be 4 letters

MIDDLE SCHOOL

A pool has an area of 1,275 m2 and a width of 25 1/2 m. What is the length of the pool.

Answer:

50m is the length of the pool

Step-by-step explanation:

area= length * width

length= area/ width

1275/ 25.5 = 50

MIDDLE SCHOOL

Solve 5x - c= k for x

Answer:

Step-by-step explanation:

Solve 5x - c= k for x

Our aim is to get 'x' alone

To get 'a' alone we need to remove the terms attaches with x

Opposite operation of -c is +c

To remove 'c' we add 'c' on both sides

5x -c +c = k + c

5x = k +

To remove 5 we divide by 5 on both sides

x=1/5c + 1/5k hopes this helps

HIGH SCHOOL

What is the image of (8,-9) after a reflection over the x-axis?

plain and short, after a reflection over the x-axis, the y-coordinate changes sign, so -9 turns to +9, (8, 9).

HIGH SCHOOL

Which term is the perfect square of 3x^4? a. 6x^8 b. 6x^16 c. 9x^8 d. 9x^16

MIDDLE SCHOOL

The equations : -3x+4y=-30− and 9x + 5 y = 39 intersect at the coordinate (h, k). What is the value of h?

Answer:

h = 6

Step-by-step explanation:

Given the 2 equations

- 3x + 4y = - 30 → (1)

9x + 5y = 39 → (2)

We require the value of the x- coordinate at the point of intersection, thus require to eliminate the y- term from the equations

Multiply (1) by 5 and (2) by - 4

- 15x + 20y = - 150 → (3)

- 36x - 20y = - 156 → (4)

Add (3) and (4) term by term thus eliminating y

- 51x = - 306 ( divide both sides by - 51 )

x = h = 6

MIDDLE SCHOOL

What is the GCF for 54,72 and 90

The answer will be 18

Answer:

Consider the graph and equation, y = 3x, that represent Alonso’s walking speed. What relationship is represented by this equation and graph? What would the points (3, 9) and (5, 15) represent?

Step-by-step explanation: