Answer:29Step-by-step explanation:I'm going to write both of this as improper fractions.That is the mixed fraction [tex]a\frac{b}{c}[/tex] can be written as the improper equivalent fraction of [tex]\frac{ca+b}{c}[/tex] assuming [tex]a[/tex] is positive. So we are going to write [tex]-3\frac{1}{3}[/tex] as [tex]-\frac{3(3)+1}{3}[/tex].Simplifying that gives us [tex]-\frac{10}{3}[/tex].Now for [tex]-8\frac{7}{10}=-\frac{10(8)+7}{10}=-\fraC{87}{10}[/tex].Now we are ready to find the product which just means multiply:[tex]\frac{-10}{3} \cdot \frac{-87}{10}[/tex]To multiply fractions you just multiply straight across on top and straight across on bottom unless you see a common factor on and bottom to cancel (and I do; I see 10)[tex]\frac{-1}{3} \cdot \frac{-87}{1}[/tex][tex]\frac{87}{3}[/tex]Negative times negative is positive.Anyways time to write 87/3 as a mixed fraction.How many 3's are in 87? 29 with no remainder