First, simplify the 16:4 ratio.
• 16:4 ÷ 2 = 8:2 ÷ 2 = 4:1
Now, check to see if they're equivalent:
• 3:1 = 4:1 ???
- 3:1 =/= 4:1
So, NO these ratios are not equivalent.
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➷ period = wavelength / speed
period = 100 / 200
period = 0.5s
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Answer:
9 years old.
Step-by-step explanation:
Since the ages of all of these students are being represented in relation to the middle student's age then we can create formulas for each student and then apply them to the formula for the sum of their ages and solve for the middle child's age (M) like so... (oldest child's age is represented by variable O and youngest child's age is represented by variable Y)
O = M + 6
Y = M - 3
30 = (M+6) + M + (M-3) ... combine like terms
30 = 3M + 3 ... subtract 3 from both sides
27 = 3M ... divide both sides by 3
9 = M
Now we know that the middle child is 9 years old.
298 x 0.062 = the amount that is deducted
298 x 0.062 = 18.476
The total amount of money she has earned this year is given to you just to confuse you. All you really need is the percent converted to a decimal, which is 0.062, and her weekly pay, which is $298. You multiply these two together to get 18.476, which when rounded becomes $18.48.
So, every week, $18.48 is deducted from her weekly pay.
I think it’s A. Hope this helped
