If I did 14 lawns in 7 hours, I would have done 2 yards every hour! Hope this helps!
Answer:
3
Step-by-step explanation:
f(x) = 2x^2 + 1
f(-1) means that wherever you see an x on the right hand side, you substitute -1.
f(-1) = 2(-1)^2 + 1 = 2 + 1 = 3
The slope-intercept form:

m - slope
b - y-intercept
We have m = 2 and b = 3. Substitute:

select two points on the line, and plug into this formula y2-y1 over x2-x1
Answer:
1. 424
2.471
3.512
Step-by-step explanation:
1. 10×12+8×10+8×13+8×15
=120+80+104+120
=424
2. 5×24+9×24+9×15+9×15
=120+216+135
=471
3. 24×16+2×24+2×20+2×20
=384+48+40+40
=512