3 years ago

How do you solve this to find r?

Mathematics

1 answer:

tatuchka [14]3 years ago

6 0

Answer:

I honestly have no clue what the answer is.

Step-by-step explanation:

I honestly have no clue what the answer is.

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Find the solution of this system of equations <br> 10x-7y=-1<br> -2x-7=-25

kirill [66]

-13,4, - 9/2 is the answer :)

3 0

3 years ago

3. 1/4 added by 2. 5/6 estimated by each sum or difference

maxonik [38]

let's firstly convert the mixed fractions to improper fractions, and then add.

$\bf \stackrel{mixed}{3\frac{1}{4}}\implies \cfrac{3\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{13}{4}}~\hfill \stackrel{mixed}{2\frac{5}{6}}\implies \cfrac{2\cdot 6+5}{6}\implies \stackrel{improper}{\cfrac{17}{6}} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{13}{4}+\cfrac{17}{6}\implies \stackrel{\textit{we'll use the LCD of 12}}{\cfrac{(3)13~~+~~(2)17}{12}}\implies \cfrac{39+34}{12}\implies \cfrac{73}{12}\implies 6\frac{1}{12}$