Question
Lindsay practices the guitar 50 minutes on Saturday and 30 minutes on most weekdays. Last week she practiced 140 minutes. How many weekdays did she practice? Write an equation in the form px+q=r to represent this problem.(2 points)
blank x + blank blank =
Let's say she practices on x weekdays.
She practices 30 minutes on each weekday, so the total time spent practicing on weekdays is 30x minutes.
She also practices 50 minutes on Saturday.
The total time she practiced last week is 140 minutes.
Therefore, the equation to represent this problem is:
30x + 50 = 140
A baby elephant weighs 150 pounds when born. It gains 2 pounds per day during the first year. How many days will it take the elephant to weigh a total of 224 pounds?(1 point)
blank days
Let's say it takes x days for the elephant to weigh a total of 224 pounds.
The elephant gains 2 pounds per day, so in x days, it will have gained 2x pounds.
Therefore, the equation to represent this problem is:
150 + 2x = 224
Reann has stickers. She gives her friend half, and then her brother gives her 8 new ones. She ends up with 12 stickers. How many did she start with? Identify the operations needed to solve this problem.(1 point)
Responses
subtraction and multiplication
subtraction and multiplication
subtraction and division
subtraction and division
addition and multiplication
addition and multiplication
addition and division
The operations needed to solve this problem are subtraction and addition.
Reann gives half of her stickers to her friend, which can be represented as subtracting half of her stickers.
Then, her brother gives her 8 new stickers, which can be represented as adding 8 stickers.
Finally, she ends up with 12 stickers, which can be represented using addition.
So, the operations needed are subtraction and addition.
Sam is buying packages with 9 beads each. His mom bought him 63 more beads. Now, he has 153 beads. How many packages did he buy? Use algebra to determine the answer.(1 point)
Let's say Sam bought x packages.
Each package has 9 beads, so the total number of beads in x packages is 9x.
His mom bought him 63 more beads, so the total number of beads he has is 9x + 63.
Finally, he has 153 beads, so we can set up the equation:
9x + 63 = 153
To determine the number of packages Sam bought, we need to solve this equation using algebra.
how many
To determine how many packages Sam bought, we need to solve the equation:
9x + 63 = 153
Subtracting 63 from both sides:
9x = 153 - 63
9x = 90
Dividing both sides by 9:
x = 90/9
x = 10
Therefore, Sam bought 10 packages.