the estimated area is 8 square units.
left point: a=x=-1
right point: b=x=2
width of each of the 3 equal rectangles: w=r/3→w=3/3→w=1
first right endpoint is x1=a+w→x1=-1+1→x1=0
second right endpoint is x2=x1+w→x2=0+1→x2=1
third right endpoint is x3=x2+w→x3=1+1→x3=2
estimated area: a≈a1+a2+a3
a≈a1+a2+a3→a≈1+2+5→a≈8 square units
i can't really make a proportion, but this is the best i can do.
1 day=24 hours=1440 minutes (to convert to the same unit)
finally, distance=speed×time, so (3/4)*1440=1080 miles.
let's use x as an unknown variable. you know that this amount was twice what she spent. this statement means the amount is equal to 2x. however, the amount is also 12 dollars less. so, the equation would now become 2x-12. lastly, you know that the amount she spent on jeans was 36 dollars so the equation would equal 36 dollars: 2x-12=36 hope this !