<span>5(x + 7) = 5(x) + 5(7) = 5x + 35</span>
Hey there!
A function is a relation to numbers in which an input value as a specific output value.
a) Is a function. All x values go to specific y values. For domain, look at the x values. You go from 2 to 8. So, 2≤x≤8 (we can assume the line just goes this long since we are not given anymore information) For the range, we have the same thing. It goes from 5 to 8. 5≤y≤8
b) Is not a function. 1 cannot go to two y-values.
c) Is not a function. Does not pass vertical line test.
d) Is a function. Passes the vertical line test. For the domain on this one, it would be infinite, which you could represent as (-∞,∞) It is infinite because the line as two arrows that continue forever. For the range, it would be anything greater than 2. y≥2 or 2≤y
The question stated you only needed to find the domain and range for the functions, so you would just do it for a) and d).
I hope this helps!
~kaikers
Answer:
A. 96.666666666666666666666...
B. 92.3333333333333333333333...
C. 82.4
D. 13
E. 29
F. 26
Here it is given that , a postal service charges a flat rate of 11.10 and a additional rate of 3 / kg .We need to write the equation in slope intercept form . And let ,
So the total cost would be the sum of flat rate plus the cost of the total weight . Therefore,
Therefore the total cost would be,
Rearrange in slope intercept form , which is y = mx + c , as ;