To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.

Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128

The fourth number is 128

7 0

3 years ago

PLEASE HELP ASAP THANK YOU<br><br>1. Find f(2) if f(x) = 2x + 1

Olin [163]

Answer:

F(2)?

Step-by-step explanation:

4 0

3 years ago

Find a polynomial f(x) of degree 3 that has the following zeros.

Thepotemich [5.8K]

Answer:

$f (x) = x (x + 5) (x-9)$

Step-by-step explanation:

The zeros of the polynomial are all the values of x for which the function $f (x) = 0$

In this case we know that the zeros are:

$x = 9,\ x-9 =0$

$x = 0$

$x = -5$ , $x + 5 = 0$

Now we can write the polynomial as a product of its factors

$f (x) = x (x + 5) (x-9)$

Note that the polynomial is of degree 3 because the greatest exponent of the variable x that results from multiplying the factors of f (x) is 3

3 0

3 years ago

Help l rely need it plz plz

tangare [24]

I think number 6. Is 45°

6 0

2 years ago