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3 years ago

If f (x) =3x^2-x, find f (-2)

2 answers:

8 0

The formatting of this question is unclear. Is the original question supposed to read $f(x)=3x^{2}-x$ or $f(x)=(3x)^{2}-x$ assuming the former:

$f(x)=3x^{2}-x$
$f(-2)=3((-2)^{2})-(-2)$
$f(-2)=3(4)+2$
$f(-2)=12+2$
$f(-2)=14$

Dovator [93]3 years ago

5 0

F (-2) = 3*(-2)^2
3*4= 12

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A party rental company has chairs and tables for rent. The total cost to rent 4 chairs and 8 tables is $89 . The total cost to r

puteri [66]

Let C = cost to rent each chairLet T = cost to rent each table

4C + 8T = 73
2C + 3T = 28
Multiply the 2nd equation by (-2) and then add the equations together

4C + 8T = 73
-4C - 6T = -56
2T = 17T = 17/2 = 8.5

Plug this in to the 1st equation to solve for C
4C + 8(17/2) = 73
4C + 68 = 73
4C = 5C = 5/4 = 1.25
So the cost to rent each chair is $1.25 and the cost to rent each table is $8.50

7 0

3 years ago

Read 2 more answers

5n + 34 = -2 ( 1 - 7n) this is due by midnight. NO LINKS PLEASE!

kodGreya [7K]

Answer :

n = 4

Step-by-step explanation:

5n + 34 = -2(1-7n)

first distribute

5n + 34 = -2(1) -2(-7n)

5n + 34 = -2+14n

-5n

then get all of n to the same side

36 = 9n

isolate the variable

36/9 = 9n/9

4 = n

7 0

3 years ago

Read 2 more answers

Write the first trigonometric expression in terms of the second expression. Cot(x); sin(x)

Alina [70]

The first trigonometric expression cot x and sin x in terms of the second expression is one over tan x and one over cosec x.

<h3>What is trigonometry?</h3>

Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.

Write the first trigonometric expression in terms of the second expression.

The cotangent can be written as

$\cot x= \dfrac{1}{\tan x}$

And the sine can be written as

$\sin x = \dfrac{1}{\csc x}$

More about the trigonometry link is given below.

brainly.com/question/22698523

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2 years ago

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre

Novay_Z [31]

Answer: $3+\sqrt{2}$

Step-by-step explanation:

Given the following expression shown in the picture:

$\frac{7}{3-\sqrt{2} }$

You need to use a process called "Ratinalization".

By definition, using Rationalization you can rewrite the expression in its simplest form so there is not Radicals in its denominator.

Then, in order to simplify the expression, you can follow the following steps:

Step 1. You need to multiply the numerator and the denominator of the fraction by $3+\sqrt{2}$ , which is the conjugate of the denominator $3-\sqrt{2}$ .