Answer:
Substituting x= 2y-2 in 5x
5(2y-2)
10y-10
10(y-1)
Answer:
70%
Step-by-step explanation:
Find the total students who attended a school assembly:
28 + 12 = 40
100% = 40 students
1% = 40 ÷ 100 = 0.40
28 ÷ 0.40 = 70
0, -1 I think. If that’s wrong use a calculator and take the answer and subtract it by the answer of the first problem
Answer: 
Step-by-step explanation:
It is important to remember that, by definition, proportional relationships have the following form:

Where "k" is the constant of proportionality.
We know that Maddy assume that the relation between the volume and the weight is proportional.
Then, let be "V" the volume in liters and "w" the weight in kilograms.
We can write the following equation:
So, if the boat of 555 liters weights 7.5 kilograms, we can find "k":

In order to solve the exercise, substitute the value of "k" and
into the equation and solve for "w". Then:
0.09 = 0.00 because 0 in the tenths is nearer to the 0 than the next number or digit :)