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serious [3.7K]
3 years ago
6

F(x) = -22 – 4x Find f(-1)

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
3 0
= -22-4(-1)
= -22+4
= -18
igor_vitrenko [27]3 years ago
3 0

Answer:

f(-1) = -18

Step-by-step explanation:

You just plug in -1 for x in the equation

f(x) = -22-4x

f(-1)=-22-4(-1)

f(-1)= -22+4

f(-1)=-18

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Helppppppppppppppppp​
Darina [25.2K]

Answer:

3)

Step-by-step explanation:

An equation is linear if equal changes in x produce equal changes in y.

Let's look at each choice.

1)

A decrease of 10% per year. That means each year, the value of the car is 0.9 times the value of the previous year.

For example, if the original value was $10,000, after 1 year, it is worth 0.9 * $10,000 = $9,000. In 1 year it lost $1,000. In the next year, its value is now 0.9 * $9,000. The value at the end of the 2nd year is $8,100. In the second year, it lost $900 in value. In one period of 1 year it lost $1000 in value. In another equal period of 1 year, it lost $900 in value. A change of 1 year in time produces different changes in loss of value, so it is not linear.

2)

Here, the number doubles every year. Let's say it starts with 100 fish. After 5 years, it has 200 fish. In a change of 5 years in x, the change in y is 100. In the next 5 years, it goes from 200 fish to 400 fish. The change in the second period of 5 years is 200. We see that a change of 5 years can produce a change of 100 fish, but another change of 5 years can produce a change is 100 fish. Since for equal changes in x, the changes in y are not all equal, this is not linear.

3)

Here for every change of 1 day in x, the change in y is 2 liters. Each change of 1 in x always produces a change of 2 in y. This is linear.

4)

Each 2 hours, the amount of caffeine is 2/3 of what it was before. This is similar to the choice 1), and it is not linear.

Answer: 3)

7 0
3 years ago
Someone pls help!
Rasek [7]

Answer:

okkkkk

wait

helping see the attachment

7 0
3 years ago
What is the domain of the function h(w)=80/w
PtichkaEL [24]
D: (-infinity, 0) U (0, infinity) because you cant have a zero in the bottom of the fraction
4 0
3 years ago
Read 2 more answers
Solve each equation for 0 degrees
blondinia [14]

Answer:

Alright.

A=0

B=15

C=23

D=87

Step-by-step explanation:

Used a Calculator

<em>Hope this helps!</em>

<em />

<em>xoxo,</em>

<em />

<em>cafeology</em>

5 0
2 years ago
PLEASE HELP WITH THIS QUESTION!! DUE BY 1PM! wILL RATE YOU GOOD!! THANK YOU!!
kupik [55]
Find a_{1} by plugging in 1 into n:
a_{1} = 98-2(1)=96

Find a_{11 by plugging in 11 into n:
a_{11} = 98-2(11)
a_{1} =98-22=76

Now to find the sum your formula is:
S_{n} = \frac{n}{2} ( a_{1} + a_{n})
n = 11,   a_{1} = 96 ,  a_{11} =76

Now plug that into the formula
S_{11} = \frac{11}{2} (96+76)
S_{11} = 5.5(172)=946

Hope that helps
8 0
3 years ago
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