Answer:
Step-by-step explanation:
From the conditions given, the total number of the problems should be 29. This means that the sum of x and y should be 29. With this and the point-system, the best system of equation that is useful for this problem is,
x + y = 29
5x + 2y = 100
The answer is the second choice.
6) C, B, A, D, E
7) C, A, E, B, D
The first step to solving a system of equations using substitution is to substitute an equation equal to one variable in for that variable in the other equation.
2x+3(x+1.5)=12
3,5% = 0.035
15 000 * 0,035 = 525 - the income every year.