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3 years ago

Find f(–2) for f(x) = 3 • 2x

Mathematics

2 answers:

masha68 [24]3 years ago

5 0

Answer: f(-2)= -12

Step-by-step explanation:

f(-2)= 3*2(-2)

f(-2)= 3*(-4)

f(-2)= -12

Sati [7]3 years ago

4 0

Answer:

actually its 2 over 9 ...aka 2/9

Step-by-step explanation:

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Solve each equation 3x^2=80

Lapatulllka [165]

Answer:

$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

$x = \frac{\pm4\sqrt{15}}{3}$

Step-by-step explanation:

Hello!

Use the quadratic formula: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

First, let's convert our equation to standard form of a Quadratic: ax² + bx + c = 0

3x² = 80

3x² - 80 = 0

Note, thats the value of b will be 0, as there is no "bx"

Now, solve:

$x = \frac{-(0) \pm \sqrt{(0)^2 - 4(3)(-80)}}{2(3)}$ Plug in values
$x = \frac{\pm\sqrt{960}}{6}$ Simplify the radical (Discriminant)
$x = \frac{\pm8\sqrt{15}}{6}$ Pull out perfect squares
$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$ Reduce factors

The solutions are $x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

5 0

2 years ago

Please answer 46 points. Do not comment if u don’t know

Alex787 [66]

Answer: 1ST ONE CUZ THE LINE IS AT A CERTAIN ANGLE AT A POINT TO MATCH THE FIRST ANSWER

Step-by-step explanation:

7 0

3 years ago

A cell phone retailer used a mark-up rate of 60% on a cellphone case that originally cost $5. To find the new price of the case

sweet-ann [11.9K]

Answer:

Step-by-step explanation:

5 increase 60% =

5 × (1 + 60%) = 5 × (1 + 0.6) = 8

7 0

3 years ago

Write these numbers from least to greatest -0.615, -5/8, -0.62

inna [77]

Well -5/8 as a decimal would be -0.625.
So, the order would be -0.615 -0.62(0) and then -5/8 (or -0.625).
You could easily search up 5/8 as a decimal :)

5 0

3 years ago

Write a verbal phrase for each of the following algebraic expressions.

Scrat [10]

Answer:

a. the product of 11 and x

b. 9 greater than x

c. x less than 18

d. the product of 4 and the difference of x and 3

Step-by-step explanation:

3 0

3 years ago