SOLUTION: I am totatly lost with evaluating please help. problem: 26) 2/3 ab, for a = 7 and b = 4 1/5 27) 4 + mn, for m = 7 2/5 and n = 3 1/4

Question 149955This question is from textbook
: I am totatly lost with evaluating please help.
problem: 26) 2/3 ab, for a = 7 and b = 4 1/5
27) 4 + mn, for m = 7 2/5 and n = 3 1/4 This question is from textbook

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
# 26

First convert the mixed number into the improper fraction note: let me know if you need help with fraction conversion.

Start with the given expression.

Plug in and

Combine the fractions

Factor into

Highlight the common terms.

Cancel the common terms.

Simplify

Multiply 2, 7, and 7 to get 98

So when and

If you want the approximate answer, then when and

First convert the mixed number into the improper fraction . Also, convert the mixed number into the improper fraction

Start with the given expression.

Plug in and

Combine the fractions.

Multiply 37 and 13 to get 481

Multiply 5 and 4 to get 20

Multiply 4 by .

Combine and multiply the fractions.

Add the fractions.

So when and

If you want the approximate answer, then when and

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