Evaluate 3a + 6b when a = 5 and b = –2.4.
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Write the expression that represents 7 subtracted from 8n.
A. 7 − 8n
B. 8n − 7
C. 7 + (−8n)
D. 8 − 7n
Before she went to the grocery store, Jana had 4 tomatoes in her refrigerator. For the next 3 weeks she buys n number of tomatoes each week.
Which algebraic expression represents how many tomatoes she has at the end of three weeks?
A. 4 − 3n
B. 4 + 3n
C. 3n − 4
Evaluate bc + 2d when b = −3, c = −7 and d = 2.4.
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Tammy purchases 16 pairs of socks for a certain amount of money.
Using s for the cost of one pair of socks, which expression represents the total cost of all 16 pairs of socks?
A. 16 − s
B. 16 + s
Tube rental at Totally Tubular is $5 per hour plus an initial deposit of $17.
Which expression represents how much it will cost to rent a tube for d number of hours?
A. 5d − 17
B. 5 – 17d
C. 17 – 5d
D. 17 + 5d
Evaluate 12 – 4x when x = 2.
Evaluate 0.67y + 4 when y = 2 and when y = –2.
A. 5.34 and 2.66
B. –5.34 and 2.66
C. –5.34 and –2.66
D. 5.34 and –2.66
Mark has been collecting 11 map pencils each week for several weeks. He then gives 13 pencils to his friend.
If p represents the number of weeks that Mark has been collecting pencils, which expression represents the number of pencils Mark has left?
A. 11p − 13
B. 11p + 13
C. 11 + 13p
D. 13p − 11
Rose blew h bubbles in two hours.
Which algebraic expression shows how many bubbles she blew in one minute?