Writing Equations in Two Variables from Context A-CED.2

John makes 2 cookies in a day. Write an equation that shows relationship between d, the number of days, and c, the number of cookies John makes.

• $d=2c$

• $c=2d$

• $d=c+2$

• $c=d+2$

Tags

CCSS.6.EE.C.9

Janey runs 3 km in 2 hours. Write an equation to show the relationship between t, the time, and d, the distance Janey runs.

• $3d=2t$

• $d=\frac{2}{3}t$

• $d=\frac{3}{2}t$

• $t=\frac{3}{2}d$

Tags

CCSS.6.EE.C.9

Vasco has 10 paintings and is making more. He can make 1 paintings in 2 days. Write an equation that shows the relationship between d, the number of days, and n, the number of paintings Vasco will have.

• $10n=2d$

• $n=10+2d$

• $n=10+\frac{1}{2}d$

• $d=\frac{1}{2}n+10$

Tags

CCSS.6.EE.C.9

Fred reads 2 books a day. Write an equation that shows that relationship between d, the number of days, and b, the number of books Fred reads.

• $d=2b$

• $b=2d$

• $d=b+2$

• $b=d+2$

Tags

CCSS.6.EE.C.9

Tom types 20 words in 30 seconds. Write an equation that show the relationship between w, the number of words Tom types and s, the number of seconds.

• $20w=30s$

• $w=\frac{2}{3}s$

• $w=\frac{3}{2}s$

• $20w=s+30$

Tags

CCSS.6.EE.C.9

Susan has begun knitting a scarf. It is 5 inches long. She can knit 2 inches each day. Write an equation that shows the relationship between L, the length of the scarf and d, the number of days.

•  $L=\frac{2}{5}d$ 

•  $L=2d-5$ 

•  $L=2d+5$ 

•  $L=\frac{5}{2}d$ 

Tags

CCSS.HSF-BF.A.1A

Bennett and his friends decide to go bowling. The cost for the group is $15 for shoe rentals plus $4.00 per game. Write an equation that relates C, the cost, of playing "g" games.

• $C=15g+4$

• $C=4g+15$

• $C=\frac{4}{15}d$

• $C=\frac{15}{4}d$

Tags

CCSS.HSF-BF.A.1A

The Ace Telephone Co. charges a flat monthly fee of $22.00 for a telephone line and $0.20 per minute for long distance calls. Write an equation that relates C, the cost, of 1 month, with "d" long-distance calls.

• $C=0.20d$

• $C=22d+0.20$

• $C=0.20•(22d)$

• $C=22+0.20d$

Tags

CCSS.6.EE.C.9

The temperature in Alaska was 45 degrees. The temperature began to drop 2 degrees every day. Write an equation to relate T, the temperature, after "d" days.

• T = 45d + 2

• T = 45 + 2d

• T = 45d – 2

• T = 45 – 2d

Tags

CCSS.HSF-BF.A.1A

Emmitt is collecting trading cards. He starts with 44 and is able to buy 6 more each week. Write an equation to relate "n", the number of cards Emmitt has, with "w" the number of weeks.

• $n=44+6w$

• $w=44+6n$

• $n=44w+6$

• $n=(44+6)w$

Tags

CCSS.6.EE.C.9