All categories

3 years ago

F(x) = -5x+5. f(-2)

Mathematics

2 answers:

almond37 [142]3 years ago

8 0

Answer:

f(-2)=15

Step-by-step explanation:

To find f(-2), we want to find what f(x), or y is, when x is equal to -2.

f(x)= -5x+5

Therefore, we can substitute -2 in for x.

f(-2)= -5(-2)+5

Now, solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

Multiply -5 and -2

f(-2)=10+5

Add 10 and 5

f(-2)=15

irga5000 [103]3 years ago

5 0

Answer:

f(-2) = 15, or y = 15

Step-by-step explanation:

f(-2) = -5(-2) + 5

f(-2) = 10 + 5, a negative multiplied by a negative will be a positive !

f(-2) = 15

y = 15

You might be interested in

Desperate Please Hurry Up

AfilCa [17]

Answer:

Step-by-step explanation:

$\frac{10}{2(25-20)}$

$\frac{10}{2(5)}$

$\frac{10}{10}$

$1$

4 0

2 years ago

Read 2 more answers

The 20 students in Ms. Wilson's art class made a project with construction paper.

OLga [1]

Answer:

9+5+x=20

14+x=20

X=20-14

X=6

Six students used a blue paper

5 0

3 years ago

In a class, 60% of the students are girls. There are 18 girls in the class.

Katarina [22]

Answer:

a. Total of 45 students.

b. 18 Boys.

5 0

3 years ago

Read 2 more answers

Solve 2x^3+7x^2-2x-1=o

Mashcka [7]

Answer:

$x=\sqrt{3}-2\\x=-\sqrt{3}-2\\x=\frac{1}{2}$

Step-by-step explanation:

This is a hard one

We have to use the rational root theorem

$2x^3+7x^2-2x-1$ = 0

We have to find all the factors of a and d and put them in a fraction

$a=2\\d=-1\\\frac{1}{1,2}$

We then plug them into the equation to see if any of them work

The equation isn't true when plugging 1, but is true when plugging in 1/2

factored form of 1/2 is (2x-1)

Then we divide the original equation by (2x-1) (you can use synthetic division or long division, it would be hard to type out the process for that) to get $x^2+4x+1$

So now the equation is $(2x-1)(x^2+4x+1)$

Solve the second half of this equation using the quadratic formula to get

$\sqrt{3}-2$ and $-\sqrt{3}-2$

We already know the solution for the first half of the equation (1/2)

So the final answers are:

$x=\sqrt{3}-2, -\sqrt{3}-2, \frac{1}{2}$

8 0

3 years ago

What is the value of x 3 (x+2)=12

Tamiku [17]

6 0

4 years ago

Read 2 more answers