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Marrrta [24]
3 years ago
12

F(x)=-2x^2+3x+7 find f(3)

Mathematics
1 answer:
Inessa [10]3 years ago
3 0

Answer:

f(3) = -2

Step-by-step explanation:

Given the f(x) = -2x² + 3x + 7, to find f(3):

We can substitute 3 as the value of x in the given function:

f(x) = -2x² + 3x + 7

f(3) = -2(3)² + 3(3) + 7

f(3) = -2(9) + 9 + 7

f(3) = -18 + 9 + 7

f(3) = -9 + 7

f(3) = -2

Therefore, f(3) = - 2.

Please mark my answers as the Brainliest if you find this explanation helpful :)

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Use the graph of the following function (x) to find the value. <br> f(1)
kvv77 [185]

From the graph of the given function , the value of f(1) = -1.

As given in the question,

From the graph of the given function,

Two coordinates from the graph are as follow:

( x₁ , y₁) = (1, -1)

( x₂ , y₂ ) = ( 0, -3 )

Equation of the line representing the function is given by:

(y - y₁) /(x-x₁) = ( y₂ -y₁)/ (x₂ -x₁)

⇒(y +1)/ (x-1) = (-3 +1)/ (0-1)

⇒ (y +1)/ (x-1) = 2

⇒y +1 = 2x -2

⇒ y = 2x -3

To get the value of x we have,

  y = f(x)

⇒f(x) = 2x -3

⇒f(1) = 2(1) -3

⇒f(1) = -1

Therefore, from the graph of the given function , the value of f(1) = -1.

Learn more about graph here

brainly.com/question/17267403

#SPJ1

3 0
1 year ago
In a class of 40 students, the number of girls is 10 more than the number of boys. We have to find the number of girls and the n
Nadusha1986 [10]

Answer:

b=15 g=25

Step-by-step explanation:

lets translate that story problem to mathematics equations

the problem told that no. of girls are 10 more than no of boys so this will =

g=b+10

then in class there are 40 students that means

g+b=40

now we have to equations with two variables then we should substitute

(b+10)+b=40

lets remove the brackets

2b+10=40 subtract 10 from both sides

2b=30 now divide both by 2

b=15 so g=25 after you write the equation once again with the new proof or number

6 0
3 years ago
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