The sum of two numbers is 60. The greater number is 6 more than the smaller number. Which equation can be used to solve for the smaller number? x + (x + 6) = 60 x − (x + 6) = 60 x(x + 6) = 60 x(x− 6) = 60
@Vocaloid
small number = x big number = (x + 6) small number + big number = 60
X + ( x+6) @Vocaloid
yes
A
great
;)
Brenda needs $40 to buy a large box of chocolate. She has saved $12 and plans to work as a babysitter to earn $7 per hour. Which inequality shows the minimum number of hours, n, that Brenda should work as a babysitter to earn enough to buy the large box of chocolate? 12 + 7n ≤ 40, so n ≤ 4 7n ≤ 40 + 12, so n ≤ 7.4 12 + 7n ≥ 40, so n ≥ 4 7n ≥ 40 + 12, so n ≥ 7.4
@Vocaloid
amount saved + (hourly wage)(number of hours) >= price of chocolate
c?
right
Martha works in a toy shop and earns $44 per day. She earns an extra $2 for each toy she sells. If Martha wants to earn at least $80 per day, which inequality shows the minimum number of toys, n, that she should sell? 44 + 2n ≥ 80, so n ≥ 18 44 + 2n ≤ 80, so n ≤ 18 44 + 2n ≥ 80, so n ≥ 34 44 + 2n ≤ 80, so n ≤ 34
same rule as the last one
A?
yes
Neil wants to buy some video games over the Internet. Each game costs $25.01 and has a shipping cost of $9.98 per order. If Neil wants to spend no more than $60 for his video games, which inequality shows the maximum number of video games, p, that he can buy? 9.98 + 25.01p ≤ 60, so p ≤ 2 9.98 − 25.01p ≤ 60, so p ≤ 4 9.98p + 25.01p ≤ 60, so p ≤ 5 9.98p − 25.01p ≤ 60, so p ≤ 6
(shipping price)(number of games) + (game cost)(number of games) <= 60
c?
nope solve for p 9.98 + 25.01p ≤ 60
A?
right
@Vocaloid
perimeter means add the sides togther
d?
@Vocaloid
yes
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