Betty earns $52.65 per week working as a lifeguard. She worked as a lifeguard for 5 weeks. She also earned $46.25 painting faces at a carnival. She spent $16.25 of her total earnings to buy a book. Betty put 1 over 6 of the remaining money in her savings account. Betty used the following steps to find the total money she put in her saving account:

Step 1: [($52.65 ⋅ 5) + $46.25 − $16.25] ⋅ 1 over 6

Step 2: [$263.25 + $46.25 − $16.25] ⋅ 1 over 6

Step 3: 293.25 ⋅ 1 over 6

Step 4: $1,759.50

In which step did Betty first make an error? Use words to explain how Betty can correct her error.

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

for the free

< < < emily> > >

hi there

the slope is 1/3.

this is because from the y-intercept, you go up one, and you go to the right three, to get to the next exact point on the graph. this is known at the “rise over run.”

p.s. (if you need it).your y-intercept is -2, because that is the point on the graph where the line crosses the y-axis.

hope that : )