MATHEMATICS
MIDDLE SCHOOL

Answer:

Every number you ever use in your daily life is a real number. That's how.

The only possible exception might be in school math IF you happen to be

studying imaginary or complex numbers. Otherwise every number you see

is always real.

Every number you ever use in your daily life is a real number. That's how.

The only possible exception might be in school math IF you happen to be

studying imaginary or complex numbers. Otherwise every number you see

is always real.

HIGH SCHOOL

The price of a pair of shoes is $45.90. The sales-tax rate is 5 percent. How much sales tax do you need to pay?

Answer:

The sales tax that is needed to be paid is $2.295

Step-by-step explanation:

Given : The price of a pair of shoes is $45.90. The sales-tax rate is 5 percent.

We have to find the sales tax that is needed to be paid.

Consider the given price of shoes as $ 45.90

Since, 5% is sales tax.

So, he pays 5% of 45.90

That is

Thus, The sales tax that is needed to be paid is $2.295.

The sales tax is 2.295, which rounded is $2.30, which is the sale tax

HIGH SCHOOL

A computer hard drive contains a circular disk with diameter 2.5 inches and spins at a rate of 7200 RPM (revolutions per minute). Find the linear speed of a point on the edge of the disk in miles per hour.

Now to solve this problem, all we have to remember is the formula for calculating the linear speed given the radial speed, that is:

v = r w

where,

v = is the linear velocity or linear speed

r = is the radius of the circular disk = (1 / 2) diameter = (1/ 2) (2.5 inches) = 1.25 inches

w = is the radial velocity (must be in rad per time) = 7200 rev per minute

Calculating for v:

v = 1.25 inches (7200 rev per minute) (2 π rad / 1 rev)

v = 56,548.67 inches / minute

Converting to miles per hour:

v = 56,548.67 inches / minute (1 mile / 63360 inches) (60 min / hour)

v = 53.55 mile / hour

MIDDLE SCHOOL

The perimeter of a square is to be between 14 and 72 feet, inclusively. Find all possible values for the length of its sides. (<= : less than or equal to) a) 3.5 <= x <= 18

b) 10 <= x <= 68

c) 7 < x < 36

d) 7 <= x and x <= 36

We know that the perimeter is the all the sides added up together. Generally, you have , where l is length and w is width.

For a square, all sides are of the same length, so you can write , where x is any side.

If the smallest perimeter is 14, then , so x is 3.5. If the largest perimeter is 72, then , so x is 18.

Therefore, you have 3.5 ≤ x ≤ 18.

For a square, all sides are of the same length, so you can write , where x is any side.

If the smallest perimeter is 14, then , so x is 3.5. If the largest perimeter is 72, then , so x is 18.

Therefore, you have 3.5 ≤ x ≤ 18.

MIDDLE SCHOOL

I make 2.5kg of popcorn and eat 750g of it while 750g of it while watching a movie . How much popcorn do i have left?

Answer:

1,75 kg

Explanation:

1 kg = 1000 g

2.5 kg = 2.5 × 1000 g = 2500 g

2500 g - 750 g = 1750 g

1750 g = 1750 ÷ 1000 kg = 1.75 kg

HIGH SCHOOL

If Tara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment? A.680%

B. .68% (this one?)

C. 6.8% (or this one?)

D. 8.6%

219/3200 is equal to x/100 = (B)

COLLEGE

What is six and twenty-three thousandths in standard form

6.23 this is the standard form of this :)

MIDDLE SCHOOL

The product of a number and its multiplicative inverse is __________. A. undefined

B. one

C. negative one

D. zero

Answer:

(B). 1

Step-by-step explanation:

15 x 1/15 = 1.

Answer:

I can confirm that B is correct

Step-by-step explanation:

I got it right

HIGH SCHOOL

1. Solve for u. -24 = u ÷ 6

2. Solve for b.

-9b = 27

3. Solve for h.

-98 = -7h

4.

What is the solution to -5m = -40?

m = -8

m = 200

m = -200

m = 8

5.

What is being done to the variable in the equation -5m = -40?

It's being multiplied by -5.

It's being divided by -5.

It's being multiplied by -40.

It's being divided by -40.

6.

What should be done to both sides of the equation in order to solve n/4 = -12.4?

Multiply by -12.4.

Divide by -12.4.

Multiply by 4.

Divide by 4.

-24 = u/6

-24 * 6 = u

-144 = u

-9b = 27

b = 27/-9

b = -3

-98 = -7h

-98/-7 = h

14 = h

-5m = -40

m = -40/-5

m = 8

the variable (m) is being multiplied by -5

n/4 = -12.4.....multiply both sides by 4

-24 * 6 = u

-144 = u

-9b = 27

b = 27/-9

b = -3

-98 = -7h

-98/-7 = h

14 = h

-5m = -40

m = -40/-5

m = 8

the variable (m) is being multiplied by -5

n/4 = -12.4.....multiply both sides by 4

MIDDLE SCHOOL

Find the range of f(x) = -2x - 5 for the domain {-2, -1, 1, 2}. {-1, -3,7,9)

{-1, -3, -7, -9}

{1, 3, 5, 7}

{-1, -3, 3,5}

‘{-1,-3, 3,5} I think it can help you