Multiply 3 1/4 x 8/18.
Answer(s): D
3 1/4 × 8/18 = 13/4 × 8/18 = 104/72 = 13/9 = 1 4/9.
Ma’Tia drove 400 miles in 6 hours. She has an additional 180 miles to drive. If she drives at the same rate of speed, how long will it take her rounded to the nearest hour?
Answer(s): A
400/6 = 180/x, 400x = 1080, x = 2.7.Rounded to the nearest hour, it will take her approximately 3 hours.
Mary’s karate class has 7 students with white belts and 21 students with green belts. What is the ratio of students with white belts to all the students in the class?
7/28 = 1/4.
What is the solution for the equation x / 3 + 4 = 7
x / 3 + 4 = 7, x / 3 = 3, x = 9.
A small t-shirt store sells two different kinds of shirts: short sleeve cost $15.00 and long sleeve cost $18.00. If the store sold 21 shirts last night and made $351, how many of each kind of shirt did the store sell?
If x denotes short sleeve shirt and y denotes long sleeve shirt, x + y = 21 and 15x + 18y = 351 15 (21 − y) + 18y = 351 315 − 15y + 18y = 351 3y = 36 y = 12 and x = 9
Lex’s favorite cookie store sells the following cookies:-Sugar: $2.00-Macaroons: $1.50-Chocolate chip: $2.50-Peanut butter: $2.00If Lex buys 3 cookies, what is the least amount he could have spent?
Answer(s): C
The cheapest cookie is $1.50, times 3 is $4.50.
Lex’s mom buys 3 of each kind of cookie for a picnic. If the store gives a 10% discount for purchase of a dozen cookies, how much did she spend?
Answer(s): B
$6 + $4.50 + $7.50 + $6 = $24. 10% of $24 = $2.40. $24 − $2.40 = $21.60.
How much do you save on a purchase of $47.00 if you shop in a store on a day in which the promotion is that the store will pay the sales tax (and sales tax is 8%)?
47 × 8 / 100 = 376 / 100 = 3.76.
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