Unit 4: Writing in 1 Variable

Tom has $2.40 in quarters and nickels in his wallet. If he has four more quarters than nickels, which equation can be used to determine y, the number of nickels he has?

• 0.25(y + 4) + 0.05y = 2.40

• 0.05(y + 4) + 0.25y = 2.40

• 0.05y + 0.25(y + 4) = 2.40

• 0.30(y + 4) = 2.40

Tags

CCSS.8.EE.C.7B

Sarah has $3.50 in dimes and nickels. If she has twice as many dimes as nickels, which equation can be used to determine x, the number of nickels she has?

• 0.15(2x) = 3.50

• 0.10x + 0.05(2x) = 3.50

• 0.05(2x) + 0.10x = 3.50

• 0.10(2x) + 0.05x = 3.50

Madeline and her children went into a bakery where they sell cupcakes for $2.75 each and donuts for $2 each. Madeline has $20 to spend. If Madeline decided to buy 3 cupcakes, which inequality could be used to determine the number of donuts, d Madeline could buy?

• (2.75)(3) + 2d ≤ 20

• (2.75)(3) + 2d ≥ 20

• 2.75d + (2)(3) ≥ 20

• 2.75d + (2)(3) ≤ 20

Tags

CCSS.7.EE.B.4B

John and his friends went to a snack shop where they sell cookies for $2.00 each and candies for $0.50 each. John has $20 to spend. If John decided to buy 5 cookies, which inequality could be used to determine the number of candies, c John could buy?

• (2.00)(5) + 0.50c ≤ 20

• (2.00)(5) + 0.50c ≥ 20

• 2.00c + (0.50)(5) ≥ 20

• 2.00c + (0.50)(5) ≤ 20

Tags

CCSS.7.EE.B.4B

Michael has 5 quarters and some nickels in his wallet. He needs at least $2.00 to buy a snack. Which inequality could be used to determine the number of nickels, n, he needs in his wallet to be able to buy the snack?

• 1.25 + n ≥ 2.00

• 1.25 + 0.05n ≥ 2.00

• 1.25 + n ≤ 2.00

• 1.25 + 0.05n ≤ 2.00

Tags

CCSS.7.EE.B.4B

Sarah has 3 dimes and some pennies in her purse. She needs at least $0.50 to buy a drink. Which inequality could be used to determine the number of pennies, p, she needs in her purse to be able to buy the drink?

• 0.30 + p ≥ 0.50

• 0.30 + 0.01p ≥ 0.50

• 0.30 + p ≤ 0.50

• 0.30 + 0.01p ≤ 0.50

Tags

CCSS.7.EE.B.4B

The width of a rectangular garden is 5 feet less than its length, l. If the area of the garden is 200 square feet, which equation represents the area of the garden?

• l - 5 = 200

• l(l - 5) = 200

• l + l - 5 = 200

• l(l + 5) = 200

The length of a rectangular field is 3 meters more than its width, w. If the area of the field is 150 square meters, which equation represents the area of the field?

• w + 3 = 150

• w(w + 3) = 150

• w + w + 3 = 150

• w(w - 3) = 150