Question

The equation for women’s shoe sizes is y = 3x − 21, where x is the length of the foot in inches. What shoe size should you recommend to a woman whose foot is 8.5 inches long?

2.5


4.5


6.5


8.5 @hoslos

Answer 1

@moneybaby980

Answer 2

As x in the number of inches, you simply replace this variable by the given value of inches. For this case, the x is 8.5, giving you:
\[y=3(8.5)-21=4.5\]
Answer, B.

Answer 3

The scatter plot graph represents the structure that Alpha-Power Company uses to charge its customers for electricity. The amount y billed to a customer who consumes x kilowatt hours of electricity can be calculated using the equation
y = 0.8x + 5. What does the slope represent in this case?

For every 5 kilowatt-hours of electricty consumed, Alpha-Power charges $1.


For every 0.8 kilowatt-hours of electricty consumed, Alpha-Power charges $1.


For every kilowatt-hour of electricty consumed, Alpha-Power charges $0.80.


For every kilowatt-hour of electricty consumed, Alpha-Power charges $5. @Hoslos

Answer 4

C.
Given that x is kilowatt-hours, then the x attached to it is to recognise the amount of it used and ready to charge it.

Answer 5

yea its C

Answer 6

uring a construction project, engineers used explosives to excavate 140 feet of tunnel into a mountain. But because of time constraints and environmental concerns, they brought in a tunnel boring machine (TBM) to excavate the rest of the tunnel. The data table lists some observations an engineer made about the length of the tunnel after the TBM was introduced.
How much of the tunnel was completed 26 days after the TBM was introduced?

1,170 feet

1,310 feet

1,260 feet

1,400 feet
Done
TBM Use
(days) Tunnel Length
(feet)
6 410
15 815
20 1,040
28 1,400
33 1,625
38 1,850
45 2,165

Answer 7

1,170 feet