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Schach [20]
3 years ago
8

Evaluate 3x^2 - x for x = -2​

Mathematics
1 answer:
Butoxors [25]3 years ago
4 0

Answer:

3x^2 - x

3 \times  - 2 \times  - 2 - 2

(3 \times  - 2 \times  - 2) -  ( - 2)

12 + 2 = 14

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3# Find the missing variable (s). Round to the nearest tenth.
rewona [7]

Answer:


Step-by-step explanation:


This triangle is already positioned to match trig functions (also known as circular functions).


Point A is origin, side AC (length x) is on X axis,

side CB (length y) is parallel to Y axis.


***** You just remember *****


cos is horizontal, on X axis,

sin is vertical, on Y axis.

To get from unit triangle with hypotenuse 1,

horizontal side cos(θ), vertical side sin(θ), you multiply all sides by same number, namely, the specified length of the hypotenuse.


***** that's all you need to know *****


Draw a unit circle centered at A, mark point Y at intersection of circle and AB, and drop a vertical line from Y crossing X axis at X.


Then radial segment AY is 1, AB is 10

horizontal segment AX is cos(32°), AC is 10AX

vertical segment XY is sin(32°), CB is 10XY.


So x = 10 cos(32°), y= 10 sin(32°).




7 0
3 years ago
Which of the following expressions is equal to -3x^2-27?
Iteru [2.4K]

Answer:

6

\sqrt{2}

3 0
3 years ago
What number is: a composite, has 4 factors and some of it's multiples are 44 & 88?
Nadya [2.5K]

A delightful question.
I think I have it.

The number is  22 .

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3 0
3 years ago
Which pair of numbers has a product of -24 and a sum of 10?
muminat

Answer:

-2;12

Step-by-step explanation:

it's too easy!

6 0
3 years ago
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Why is it important to describe the variable in an expression?
Korvikt [17]

Answer: They show numerical value. You have to make them clear.

Step-by-step explanation:

5 0
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