Answer:
The number of problems are correct in the math quiz be 35 .
Step-by-step explanation:
Let us assume that the number of problems are correct in the math quiz be x.
The math quiz has 45 problems.
[tex]Martha\ got\ \frac{7}{9}\ of\ them\ correct.[/tex]
Than the equation becomes
[tex]x = \frac{7\times 45}{9}[/tex]
Solving the above
[tex]x = \frac{315}{9}[/tex]
x = 35
Therefore the number of problems are correct in the math quiz be 35 .
