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Mice21 [21]
3 years ago
5

How can I tell if f(x)=400 in f(x)=4x-9 or if t(n)=400 in t(n)=4n-9?

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
7 0
Use the graph on your calculator and then check their roots and their vertex

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PLEASE HELP!!!!!!!!! WILL MARK BRAINLIEST!!
svet-max [94.6K]

Answer:

b=-0.0019a + 215

at 2500 ft, b=210.25 degrees F

Step-by-step explanation:

First find the slope. a=altitude, b = temperature

slope is b2-b1 / a2-a1

points are (8200, 199.42) and (4700, 206.07)

(206.07 - 199.42) / (4700-8200)

= 6.65/ -3500

= - 0.0019

we have b = -0.0019a + intercept

plug in a point to find intercept

199.42 = -0.0019*8200 + intercept

intercept = 199.42 + 15.58 = 215

b=-0.0019a + 215

at a=2500 ft, substitute into equation

b= -0.0019*2500 + 215

= -4.75 + 215

= 210.25 degrees F

please give thanks by clicking heart button :)

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2 years ago
a board game that normally costs $30is on sale for 25 percent off. what is the sale price of the game
telo118 [61]

Answer:

22.5

Step-by-step explanation:

Hey there! first, we find 25% of 30 which equals 7.5 then we subtract 30 - 7.5 which is 22.5

8 0
3 years ago
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I need help on number 4?
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