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Llana [10]
3 years ago
9

If the function f is defined by f(x)=3x+4, then 2f (x) +4=

Mathematics
1 answer:
Karolina [17]3 years ago
6 0
f(x)=3x+4 \\ therefore \\ 2*f(x)+4=2(3x+4)+4=6x+8+4=6x+12
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If f(x) = -(x - 1) then does f(-2)=3?​
Aneli [31]

Answer:

Yes thats correct

Step-by-step explanation:

5 0
3 years ago
An equation that represents the path of a diver jumping off a diving board is y = –7x2 + 5x + 16. Graph this function from the p
ANTONII [103]

Answer:

See explanation

Step-by-step explanation:

An equation that represents the path of a diver jumping off a diving board is

y = -7x^2 + 5x + 16.

The diver jumped to the water when x = 0.

Then

y=-7\cdot 0^2+5\cdot 0+16=16

The jumper reached the water when y = 0, then

-7x^2+5x+16=0\\ \\D=5^2-4\cdot (-7)\cdot 16=25+448=473\\ \\x_{1,2}=\dfrac{-5\pm\sqrt{473}}{-14}

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\left(\dfrac{5+\sqrt{473}}{14},0\right)\approx (1.93,0)

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4 years ago
Please help calc problem
lys-0071 [83]
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4 0
3 years ago
Read 2 more answers
10% of Kindergarteners know how to read before school starts. If there are 150 kindergarteners at a
Tamiku [17]

Answer:

15

Step-by-step explanation:

To get 10 percent, you divide by 10.

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3 0
4 years ago
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Bobby put 1/3 of his lawn mowing money into his savings and uses the remaining 2/5 to buy a video game. If he has $12 left, how
Alexeev081 [22]

Given:

Bobby put 1/3 of his lawn mowing money into his savings

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He has $12 left.

To find:

The amount did he have at first.

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Let x be the initial amount.

Bobby put 1/3 of his lawn mowing money into his savings. So, the remaining amount is

x-\dfrac{1}{3}x=\dfrac{2}{3}x

He uses the remaining 2/5 to buy a video game. Then the remaining amount is

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Remaining=\dfrac{2}{3}x-\dfrac{4}{15}x

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Remaining=\dfrac{2x}{5}

It is given that the remaining amount is $12.

12=\dfrac{2x}{5}

12\times 5=2x

60=2x

Divide both sides by 2.

\dfrac{60}{2}=x

30=x

Therefore, Bobby have $30 at first.

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3 years ago
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