Explanation:
34.
they have to earn more than $400 to have money left at the end. each ticket they can sell for $4. and they start with $72 from the previous bake sale (which they have even if they sell 0 tickets).
so,
400 < 4t + 72 | subtract 72 from both sides
400 - 72 < 4t + 72 - 72
328 < 4t | divide both sides by 4
328/4 < 4t/4
82 < t
or
t > 82
I cannot see which original answer option is that (C or D). so, please pick the one that says exactly this above.
FYI : if your teacher considers the break-even point (you have exactly as many expenses as income : the difference is 0) as "money left", then you need to change the equality sign to t >= 82.
but I bet that the first answer (that indicates they end up with more than $0) is correct.
35.
2 - 6(-5t + 1) | multiply the bracket
2 + -6×-5t + -6×1
2 + 30t - 6
30t - 4 (answer C)
remember, -×- = +
but what if your manual correction is wrong ?
then it would seemingly be
2 - 6(-5t - 1) | multiply the bracket
2 + -6×-5t + -6×-1
2 + 30t + 6
30t + 8