You are saving for a skateboard. Your aunt gives you $45 to start and you save $3 each week. The expression 45 + 3w gives the amount of money you save after w weeks. How much will you have saved after 4 weeks?(1 point) Responses $576 $576 $33 $33 $42 $42 $57
To find out how much you will have saved after 4 weeks, we need to plug in the value of w (=4) into the expression 45 + 3w.
45 + 3(4) = 45 + 12 = 57
Therefore, you will have saved $57 after 4 weeks.
Rachel has been studying for her math test. In 15 minutes she finished 7 1/2 questions. How many questions does she answer in one minute? (1 point)
To find out how many questions Rachel answers in one minute, we need to divide the number of questions she finished (7 1/2) by the time it took (15 minutes).
First, we need to convert the mixed number 7 1/2 into an improper fraction. To do that, we multiply the whole number by the denominator and add the numerator:
7 * 2 + 1 = 14 + 1 = 15
So, 7 1/2 is equivalent to the improper fraction 15/2.
Now, we can divide 15/2 by 15:
(15/2) ÷ 15 = (15/2) * (1/15) = (15 * 1) / (2 * 15) = 15/30
Simplifying 15/30, we get:
15 ÷ 15 = 1
30 ÷ 15 = 2
So, 15/30 simplifies to 1/2.
Therefore, Rachel answered 1/2 of a question in one minute.
To find out how much you will have saved after 4 weeks, we can substitute the value of w with 4 into the expression 45 + 3w.
45 + 3(4)
= 45 + 12
= 57
Therefore, you will have saved $57 after 4 weeks.
To find out how much you will have saved after 4 weeks, you need to substitute the value of w as 4 into the expression 45 + 3w.
Let's calculate the expression:
45 + 3w
= 45 + 3(4) [Replace w with 4]
= 45 + 12
= 57
So, you will have saved $57 after 4 weeks.