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UNO [17]
3 years ago
8

IS THIS A FUNCTION, AND WHY

Mathematics
1 answer:
shepuryov [24]3 years ago
4 0

Answer:

Yes, it is a function

Step-by-step explanation:

It is a function because for every y value there is a different x value. We can also use the vertical line test to see if there are two points on the same line.

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Jon wrote the expression shown.
Tcecarenko [31]
An equivalent expression is (x+2)
8 0
2 years ago
What is the y-intercept and slope of the following equation y=8-2x​
charle [14.2K]

Answer:

Sloper = -2

y-intercept = (0,8)

Step-by-step explanation:

y=8-2x

y=-2x+8

m=-2

b=8

3 0
3 years ago
Read 2 more answers
The surface area of a rectangular prism is 2,280 square feet. If the width and height are 20 and 15 feet, the length of the pris
kolbaska11 [484]

Answer:

The statement is trrue.

Step-by-step explanation:

Given that,

The surface area of a rectangular prism = 2,280 square feet

Width, b =20 feet

Height, h = 15 feet

The formula for the surface area of a rectangular prism is given by :

A=2(lb+bh+hl)

Where

l is the length of the prism

Substitute all the values,

A=2(lb+bh+hl)\\\\2,280=2(20l+20\times 15+15l)\\\\1140=(20l+20\times 15+15l)\\\\1140=35l+300\\\\1140-300=35l\\\\35l=840\\\\l=24\ feet

So, the length of the prism is equal to 24 feet.

6 0
3 years ago
26. The cost of a television set has increased continuously by 2%. In 1999, the average
RUDIKE [14]

Answer:

<u>The exponential model is: Cost after n years = 400 * (1 + 0.02)ⁿ</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Cost of the TV set in 1999 = US$ 400

Annual increase rate = 2% = 0.02

2. Write an exponential model to represent this data.

Cost after n years = Cost in 1999 * (1 + r)ⁿ

where r = 0.02 and n = the number of years since 1999

Replacing with the real values for 2020, we have:

Cost after 21 years = 400 * (1 + 0.02)²¹

Cost after 21 years = 400 * 1.5157

Cost after 21 years = $ 606.28

The TV set costs $ 606.28 in 2020.

<u>The exponential model is: Cost after n years = 400 * (1 + 0.02)ⁿ</u>

8 0
3 years ago
Write 11 times 47 using the distributive property. Then simplify.
Simora [160]

Distributive property is in the form of:<span>

a (b+c) = ab + bc</span>

<span>

In this case, we try writing 47 as:</span>

47 = 50-3  or 47 = 40+7

 

Therefore:<span>

11 x 47 = 11 x (50-3) = 11 x 50 - 11 x 3 = 550 - 33 =  517

or 

<span>11 x 47 =  11 x (40+7) = 11 x 40 + 11 x 7 = 440 + 77 = 517</span></span>

5 0
3 years ago
Read 2 more answers
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