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Fiesta28 [93]
3 years ago
8

If f(x) = 3x 2 - x, find f(-2). A: 10 B: 14 C: 38

Mathematics
1 answer:
AleksAgata [21]3 years ago
4 0

Answer:

A

Step-by-step explanation:

3 times -2 is -6

-6 times 2 is -12

-12- (-2) is 10

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How much fabric is needed to make a tent in the shape of a triangular prism with the following measures?
marshall27 [118]

Answer:

C) 273 ft²

Step-by-step explanation:

7x11x3=231

2x1/2x7x6=42

231+42=273

3 0
3 years ago
Neal decides to sell his concert tickets to a sold- out show. He paid 90$ for the pair but believes he can sell them for 150% of
Pie

Answer:

Neal thinks that he can sell the tickets for $135.

Step-by-step explanation:

Original price at which Neal bought the tickets = $90

If he expects to sell them at 150% of the original,

150% as a decimal = 150/100 = 1.5

the new resale price = 1.5* $90

                                   = $135

Therefore, Neal thinks that he can sell the tickets for $135.

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Step-by-step explanation:

3 0
3 years ago
Find the difference between 0.1 kg and 75g​
Marrrta [24]

Answer:

25 g

Step-by-step explanation:

0.1 kg can be written as 100 grams

& 75 g

while 1 kg is 1000 grams

so difference:-

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8 0
3 years ago
Read 2 more answers
Find the general solution of <img src="https://tex.z-dn.net/?f=2cos%282x%20%2B%20%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%29%20%3D%20%5Cs
Aleks04 [339]

Answer:

\large\boxed{x=-\dfrac{\pi}{4}+k\pi\ \text{or}\ x=k\pi\ \text{for}\ k\in\mathbb{Z}}

Step-by-step explanation:

2\cos\left(2x+\dfrac{\pi}{4}\right)=\sqrt2\qquad\text{divide both sides by 2}\\\\\cos\left(2x+\dfrac{\pi}{4}\right)=\dfrac{\sqrt2}{2}\to2x+\dfrac{\pi}{4}=\pm\dfrac{\pi}{4}+2k\pi\\\\2x+\dfrac{\pi}{4}=-\dfrac{\pi}{4}+2k\pi\ \vee\ 2x+\dfrac{\pi}{4}=\dfrac{\pi}{4}+2k\pi\qquad\text{subtract}\ \dfrac{\pi}{4}\ \text{from all sides}\\\\2x=-\dfrac{2\pi}{4}+2k\pi\ \vee\ 2x=2k\pi\qquad\text{divide all sides by 2}\\\\x=-\dfrac{\pi}{4}+k\pi\ \vee\ x=k\pi\ \text{for}\ k\in\mathbb{Z}

5 0
4 years ago
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