Simplify this;
what is -2x + x?

Answers

Answer 1

Answer:

Answer:

-x

Step-by-step explanation:

Note that when there is a standalone variable (such as the x in this example), it typically actually means 1x. (If it is -x, it will be -1x.) However, you do not write 1 in front, as it is presumed.

Subtract the coefficient of each terms:

1x - 2x = -1x

-x is your simplified form.

Answer 2

Answer: Answer is -x

• If a term doesn’t have a coefficient is considered that the coefficient is 1
-2x + 1x
• collect like terms by calculating the sum of the coefficients
(-2 + 1)x
• Write the sum
-1x
• The coefficient negativeone doesn’t have to be written but the sign remains
-x

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A set of data includes 101 data points ranging from 0 – 200. If the data is split into classes with a range of 20 (1 – 20, 21 – 40, etc), and there are no values that fall in the class 101 – 120, what can you say about the data?A.The mean of the data will not be between 101 and 120.
B. All the data lies below 100.
C. The relative frequency of the class 101 – 120 is 0.
D. The median could be in the range 101 – 120.

Answers

Answer:

The relative frequency of the class 101 – 120 is 0.

Step-by-step explanation:

i took the quiz

D, because there might be values higher than 120, because the data points range from 0 - 200.

Which step should be completed first to solve the equation 9 -3q = 14 ?A.
Add 14 to both sides.

B.
Divide both sides by 3.

C.
Divide both sides by −3.

D.
Subtract 9 from both sides.

Answers

The answer is D.Subtract 9 from both sides, because 9 is positive, so you need to subtract.

A circle has an area of 36π in2. What is the area of a sector of the circle that has a central angle ofπ 6?

A)3 in2
B)6 in2
C)12 in2
D)196 in2

Answers

A central angle : π / 6 = 30 °
30 ° = 360 ° / 12
The area of the sector is 1/12 of the area of a circle.
Therefore area of the sector is:
A = 36 π / 12 = 3 π
Answer: A ) 3 π in²

Answer: Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Area of a circle = 36π in²

As we know the formula for "Area of circle ":

$Area=\pi r^2\n\n36\pi=\pi r^2$

Now, we need to calculate the area of sector.

As we know the formula for "Area of sector":

$Area\ of\ sector=(\theta)/(360\textdegree)\pi r^2\n\nArea\ of\ sector=(30)/(360)* 36\pi \n\nArea\ of\ sector=(1)/(12)* 36\pi\n\nArea\ of\ sector=3\pi\ in^2$

Hence, Option 'A' is correct.

a rectangle has a perimeter of 46cm and an area of 120cm squared. find its dimensions by writing an equation and using the quadratic formula to solve it. Thanks!

Answers

Let length = l , width = b
Perimeter = 2 (l +b)
46= 2 (l +b)
(l + b) = 23

l*b = 120

So l + 120/l = 23
l^2 + 120 - 23l = 0
l^2 -15l + 8l + 120 = 0
(l-8) (l - 15) =
l = 8 or 15
i.e if l =8, w=15
and if l = 15, w = 8

Which of the following values is a solution of 3|5 + x| = 12? A. 7

B. 1

C. –9

D. –17

Answers

It is easiest to simply just substitute any of the choices into the original equation and see which one satisfies the equation.

Given the equation: 3 * |5 + x| = 12

Using choice A. x = 7
3 * |5 + 7| = 12
36 =/= 12

Using choice B. x = 1
3 * |5 + 1| = 12
18 =/= 12

Using choice C. x = -9
3 * |5 + -9| = 12
12 = 12

Therefore, the correct answer is C. -9

What multiples to be 12 but adds to be 7