Shelly bought a 2-ounce tube of blue paint. she used 2/3 ounce to paint the water,3/5 once to paint the sky and some to paint a flag. after that she has 2/15 ounce left. how much paint did shelby used to paint her flag? (pls answer)

Shelby used  or  ounce to paint the flag.

To determine how much paint Shelby used to paint her flag then, we have:

= + +   (let solve the first 2 fractions)

= + (the lowest common denominator of 3 and 5 is 15)

= (5 x 2) + (3 x 3) / 15

= (10) + (9) / 15

= 10 + 9 / 15

=  .

Now we should add  with the fraction of ounce she had left:

Therefore, we have  

= +  (the lowest denominator of 15 and 15 is 15)

= (19 x 1) + (1 x 2) / 15

= (19) + (2) / 15

=  .

Recall that the total paint is 2-ounce. Therefore, to get the fraction of ounce used to paint a flag, we have to subtract the ounce of the total paint from the .

Therefore we have:

2-  (can also be expressed as – )  

= (15 x 2) – (1 x 21) / 15 (the lowest denominator is 15)

= (30) – (21) / 15

= 30 – 21 / 15

=  or  .  

Therefore Shelby used or ounce to paint the flag.

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105