All categories

3 years ago

Given the function f(x)=9-2x, find x when f(x)=25 -41 17 -8

2 answers:

4 0

F(x)=9-2x move negative two over to f(x) and combine the two so it then becomes 3x then combine 9 and 25 and you get 34 then subtract f(x)to 3x and you get 2x and then divide 34 by 2x and you get 17

tatyana61 [14]3 years ago

3 0

Answer:

x = -8

Step-by-step explanation:

Set the function f(x)=9-2x equal to 25, and then solve the resulting equation for x:

9 - 2x = 25.

Isolate the -2x term by subracting 9 from both sides:

-2x = 16

Finally, solve for x by dividing both sides by -2:

x = -16/2, or x = -8

You might be interested in

Please help!!! Which equation is in point-slope form and is depicted by the line in this graph?

Blizzard [7]

Y-y1=m(x-x1)
a point on the line is (x1,y1) and the slope is m

so
slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
so

points (-2,3) and (3,0)
slope is (0-3)/(3-(-2))=-3/(3+2)=-3/5
a point is (3,0) Or (-2,3)

so it could be
y-0=-3/5(x-3) or y-3=-3/5(x-(-2)) which is equal to y-3=-3/5(x+2)
that's the answer
B is answer

7 0

4 years ago

If a circle’s diameter is 3 inches, what would be the best estimate of its circumference? A) 3 inches B) 9.42 inches C) 10.42 in

iogann1982 [59]

The answer would be approximately 9 inches but the real number is 9.42 So B is the answer. I hope this helped ^^

4 0

3 years ago

Read 2 more answers

F(x) = x2 + 3 f(5) = 13 True False

True [87]

Answer:

f(5) does not equal 13.

Step-by-step explanation:

When we are given a function f(x), we can substitute any value for x as long as we change that value in the equation as well.

Therefore, if we are given f(5), we changed the x. Therefore, we also change the x in the rest of the equation. This would leave us with f(5) = 5² + 3. Now, we can just simplify.

f(5) = 5² + 3

f(5) = 25 + 3

f(5) = 28

Because we are asked to find if f(5) is equal to 13, we can see that 28 is definitely not equal to 13 and determine that this statement is false.

3 0

4 years ago

Two sets of the sum of a number and eight are added to five times the same number

romanna [79]

This question is to find the algebraic expression given by words. Call the unknown number x. Then the sum of it and eight is x + 8. Two sets of it means 2 (x + 8). Now that added to five times the number is 2 (x + 8) + 5x. Then, the answer is: 2 (x + 8) + 5x.

5 0

3 years ago

What is the length of CD ? In this diagram ABC EDC ? Please help !!!!

n200080 [17]

Answer:
CD = x = 4 units

Explanation:
We are given that the two triangles are similar. This means that we can set the similarity proportionality as follows:
$\frac{BC}{CD} = \frac{CA}{CE} = \frac{AB}{ED}$

W e have:
BC = 20 - x
AC = 20
CD = x
CE = 5

Substitute in the above proportionality and solve for x as follows:
$\frac{20-x}{x} = \frac{20}{5} = 4$

4x = 20 - x
5x = 20
x = 4

Based on he above:
CD = 4 units
BC = 20 - x = 20 - 4 = 16 units

Hope this helps :)

5 0

3 years ago

Read 2 more answers