MATHEMATICS COLLEGE

Which of the following is a simplified form of the expression -2(x - 9) - x?

Answers

Answer 1

Answer:

Answer:

-3x+18

Step-by-step explanation:

Distribute -2 through the parenthesis

-2x+18-x

Collect the like terms

-3x+18

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The perimeter of a square is 20, find the length of a diagonal. Round your answer to theearest tenth.

Answers

Answer:

Step-by-step explanation:

Determine the circumference of the base of the tin?

Answers

By answering the given question, we may state that We can apply the formula if we know the radius: C = 2πr where the radius r is.

what is diameter?

In geometry, a circle's diameter is any straight line segment whose endpoint is on the circle and which passes through its centre. Another name for it is the circle's longest chord. The diameter of a sphere can be defined using either idea. The diameter is the length of the line perpendicular to the two points at either end of the circle. If you think of length as the distance between two points, then diameter is length. The diameter of a circle is the separation between its two farthest points.

We must know the base's diameter or radius in order to calculate the circumference of the tin.

If we know the diameter, we can apply the following formula to determine the circle's circumference:

C = πd

where d is the diameter and C is the circumference.

We can apply the formula if we know the radius:

C = 2πr

where the radius r is.

To know more about diameter visit:

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7th grade math help me plzzz

Answers

Answer:

a. -7 + 3

b. draw 7 negatives + 7 positives

Step-by-step explanation:

Answer:

3.a) -7 + 3

3.b) 4

I hope this helps!

A 3 ft by 5 ft wooden board has three equally sized circles cut out of it. A penny will be randomly tossed onto the board. What is the probability the penny will fall through any of the holes?

Answers

Answer:

Pr = 15.71% ≈ 16%

Step-by-step explanation:

Let's begin by listing out the data given unto us, we have:

Length of board = 3 ft, Width of board = 5 ft,

Area of board = Length * Width = 3 * 5 = 15 ft²,

Diameter of each circle (d) = 1 ft; r = d ÷ 2

⇒ r = 1 ÷ 2 = 0.5 ft

Area of each circle = πr² = π * 0.5² = 0.785 ft²

Area of the three circles = 3πr² = 2.356 ft²

Probability = favourable outcome ÷ Total outcome

Probability of the penny falling into the hole = area of the three circles ÷ area of board

Pr = 2.356 ÷ 15 = 0.1571

Converting to percentage, we multiply by 100

Pr = 0.1571 * 100

Pr = 15.71% ≈ 16%

Therefore, the probability of the penny falling into the hole is 15.71% ≈ 16%

Scott is a software salesman. Let represent his total pay (in dollars). Let represent the number of copies of History is Fun he sells. Suppose that and are related by the equation 80x+2100=y Answer the questions below.

Note that a change can be an increase or a decrease.

For an increase, use a positive number. For a decrease, use a negative number.

What is the change in Scott's total pay for each copy of History is Fun he sells?

What is Scott's total pay if he doesn't sell any copies of History is Fun?

Answers

Answer:

A. $80

B. $2100

Step-by-step explanation:

Given:

80x+2100=y

Rewrite the equation

y = 80x + 2100

Where,

y = Scott's total pay (in dollars)

x = number of copies of History is Fun he sells

2100 = fixed pay

Since, x = number of copies of History is Fun he sells

If x = 0

y = 80x + 2100

= 80(0) + 2100

= 0 + 2100

= 2100

y = $2100

If x = 1

y = 80x + 2100

= 80(1) + 2100

= 80 + 2100

= 2180

y = $2180

change in Scott's total pay for each copy of History is Fun he sells = $2180 - $2100

= $80

B. What is Scott's total pay if he doesn't sell any copies of History is Fun?

That is, when x = 0

y = 80x + 2100

= 80(0) + 2100

= 0 + 2100

= 2100

y = $2100

I NEED HELPPP ASAPPPPP I WILL GIVE BRAINLIESTTTT!!!!!!a function is a binary relation between two sets that associates every element of the first set to exactly one element of the second set.

Answers

No, there are x sets that match the same one in the y set. The red one

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