Answer:
x for the first one is equal to-4
2 meters = 200 centimeters
<u>Given</u>:
Juan has been saving for a new bike for two months. So far, he has saved $150 for the bike.
The money that he has saved so far is 30% of the cost of the bike.
We need to determine the total cost of the bike.
<u>Total cost of the bike:</u>
Let x denote the total cost of the bike.
The total cost of the bike is given by

The value of 30% can be written as 
Thus, we get;

Multiplying both sides by
, we have;

Simplifying, we have;


Thus, the value of x is 500.
Hence, the total cost of the bike is $500.
Answer:
b) (5, -3)
Step-by-step explanation:
The given equations are;


I prefer using substitution because of the first equation.
Put equation (1) into equation (2) to obtain;

We expand the parenthesis to obtain;

Group similar terms to get;

Simplify

Divide through by 5;


Put
into equation (1) to get;


The solution is (5,-3).
The correct answer is B