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2 years ago

What is f(-1)=-3x^{2}+7x+4

Mathematics

2 answers:

tino4ka555 [31]2 years ago

5 0

Step-by-step explanation:

please mark me as brainlest

Pie2 years ago

5 0

F(-1) = -3(-1)^2 + 7(-1) + 4 = -3 + -7 + 4 = -6

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Please help me with part A B and C can you write the answers and show me how you get it in a notebook please

Gelneren [198K]

You can see all answers in the picture

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3 years ago

F(x)=2x+3 and g(x)=4x-2. Find f(x) x g(x). Find f(x) - g(x).

const2013 [10]

Answer:

f(x) * g(x) is 8x^2 + 8x -6

f(x) - g(x) is -2x + 5

Step-by-step explanation:

When finding the answer, we can notice they already give the values for the needed answers.

The first one requires f(x) and g(x). At the beginning of the question it shows that f(x) is equal to 2x+3. Meaning we can plug in 2x+3 for f(x).

The same goes for g(x). At the begginning of the question, it shows that g(x) is equal to 4x-2. Meaning we can plug in 4x-2 for g(x).

f(x) * g(x)

(2x+3) * (4x-2)

To find the answer, we need to distibute the 2x+3 into 4x-2.

To distribute, we do :

2x * (4x-2) + 3 * (4x-2)

First we distribute the 2x

2x * 4x = 8x^2 and 2x * -2 = -4x

8x^2 - 4x

Next we distibute the 3

3 * 4x = 12x and 3 * -2 = -6

12x - 6

Now we can combine them by adding like terms to get the asnwer:

8x^2 = 8x^2

-4x + 12x = 8x

-6 = -6

The first answer is 8x^2 + 8x -6

Second question:

Since we already know the values for f(x) and g(x), all we have to do is plug in the values.

(2x+3) - (4x-2)

This time, since we are subtracting, all we have to do is subtract like terms.

2x - 4x = -2x

3 - (-2) = 5

The second answer is -2x + 5

3 0

2 years ago

The sun shining down on a 19 foot tall post casts a shadow that is 7 feet long. What is the angle of elevation of the sun?

ale4655 [162]

Sorry I haven’t done elevation before but I think 7 I don’t know random guess

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3 years ago

The booster club recently bought new baseball equipment. They spent $18 per glove and $24 dollars per catching mask and spent a

hammer [34]

Answer:

given below

Step-by-step explanation:

let the number of gloves be y

then number of masks is y + 8

therefore a equation can be formed:

18(y) + 24(y + 8) = $612

18y+24y+192=612

42y=420

y=$10

each glove cost $10

therefore each masks cost $18

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3 years ago

What is the slope of the line?

butalik [34]

let us assume that make inclination θ

with positive direction of x-axis then slope(m) of the line is given by

m=tanθ.

Hope it helps ☺☺

Mark as brainleist plz .

8 0

3 years ago

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