All categories

3 years ago

If f(x)=4x-20 what is f(4)

Mathematics

2 answers:

Paha777 [63]3 years ago

5 0

F(4)=4(4)-20
f(4)=16-20
f(4)=-4

Rudik [331]3 years ago

3 0

Answer:

Step-by-step explanation:

f(x) = 4x - 20

f(4) → put x = 4 to the equation of the function:

f(4) = 4(4) - 20 = 16 - 20 = -4

You might be interested in

In this composite function, (f◦g)(x) where f(x)=(X-3) and g(x)=X^2 what is (f◦g)(x) when x=1?

Alekssandra [29.7K]

Answer:

When x = 1, (f◦g)(x) is -2.

Step-by-step explanation:

Composite function:

The composite function of f and g is given by:

$(f \circ g)(x) = f(g(x))$

In this question:

$f(x) = x - 3, g(x) = x^2$

Composite function:

The composite function is:

$f(g(x)) = f(x^2) = x^2 - 3$

At x = 1

$(f \circ g)(1) = 1^2 - 3 = 1 - 3 = -2$

When x = 1, (f◦g)(x) is -2.

3 0

3 years ago

A set of headphones takes 5 minutes to charge up to 3 hours play. What is the unit rate?

Burka [1]

Answer:

1.666667 headphones per hour (simplify this)

Step-by-step explanation:

divide the top and bottom by 3 and you should get your answer

4 0

2 years ago

The sum of x and 8 is less than 72

Vanyuwa [196]

Answer:

x<84

Step-by-step explanation:

First, write an inequality. We know it is not an equation because of the words "less than". Also, x and 8 are being added because of the word "and". Here's the inequality: x+8 < 72. Now, subtract 8 on both sides so x is isolated. Our simplified inequality looks like this: x < 84.

4 0

3 years ago

Describe a situation where it would be better to use a fraction than a decimal or a percentage

AysviL [449]

I prefer to use fractions for some irrational numbers.

For example, 1/3 is equal to an infinite 0.3333333333333333...

6 0

3 years ago

Read 2 more answers

An airplane is 32,000 feet above the ground begins descending at a rate 2,500

grandymaker [24]

Answer:

32000-2500x, let x equal number of minutes.