Answer:
13
Step-by-step explanation:
Since x is squared, the inverse operation would be square root. So, the square root of 169 is 13.
Answer:
I think it 3.15 if it wrong I'm not even here
Answer:
Helena uses double the amount of water to the amount of vinegar.
Step-by-step explanation:
- A unit rate is a ratio that is used to compare different kinds of quantities.
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A unit rate describes how many units of the first quantity corresponds to one unit of the second quantity.
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So, unit rate of water to vinegar means how much water is needed corresponding to 1 unit of vinegar.
- Formula:

- Thus, for every 1 unit of vinegar, one needs two units of water.
Thus, Helena uses double the amount of water to the amount of vinegar.
Answer:
Step-by-step explanation:
Let the age of of Mrs brook be x
Age of her son be y
If Mrs.Brooks lacks 7 years from being five times as old as her son, this means;
x = 5y - 7 ..... 1
six years from now;
Mrs brooks age = x + 6
sons age = y + 6
If Six years from now she will lack 3 years from being three times as old as her son, this means;
x+ 6 = 3(y+6) - 3
x+6 = 3y + 18 - 3
x+6 = 3y + 15 .... 2
substitute 1 into 2;
(5y - 7)+6 = 3y + 15
5y - 1 = 3y + 15
5y-3y = 15 + 1
2y = 16
y = 8
substitute y = 8 into equation 1;
x = 5y - 7
x = 5(8)-7
x = 40-7
x = 33
Hence the mrs brook is 33 years old
her son is 8 years old