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3 years ago

F(x)= -x^2+19 find f(3)

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

5 0

Answer:

$\boxed {\tt f(3)= 10}$

Step-by-step explanation:

We are given the function:

$f(x)= -x^2+19$

We want to find f(3), therefore we must substitute 3 in for x.

$f(3)= -(3)^2+19$

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. Evaluate the exponent.

(3)² = 3*3 = 9

$f(3)= -(9)+19$

$f(3)=-9+19$

Add 19 to -9.

$f(3)= 10$

For the function f(x)=-x²+19, f(3)= 10

Whitepunk [10]3 years ago

4 0

I’m not sure but this could help

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6 0

3 years ago

Read 2 more answers

Help I don't know what this is?

erica [24]

Pls show what you need help with

8 0

4 years ago

Find the surface area of the rectangular prism. 5ft tall 5 feet long 2 feet wide

Mars2501 [29]

Answer:

46.25 feet squared

Step-by-step explanation:

base area = 5x2 = 10

you need to find how tall the faces of the prism are now. You can do this using the pythagorean theorem: a^2+b^2=c^2

5^2+2.5^2=c^2 and 5^2+1^2=c^2

(since it is a rectangular pyramid)

c= 5.60 and c= 5.01

now be can find the surface area of the 4 triangles

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3 years ago

Pat wants to create s rectangular playpen for her dogs in her backyard. And estimates the dogs will need 600 square feet. She al

Ira Lisetskai [31]

I found width=13.72 ft and length=43.72 ft.
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4 years ago

Please provide an explanation, thank you!

Alla [95]

Answer:

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50 = 2x+25

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y = 2

4 0

3 years ago