At a swim meet 20 medals were a warded. Four were gold metals 45% of the metals were silver the rest were bronze. What percent of the medals awarded were bronze

35%

Step-by-step explanation:

To figure out the percentage of bronze medals, we must figure out the percentages of the gold and silver medals first.

We already know that 45% of the medals were silver.

We know that 4 of the 20 medals were gold.

4/20 as a percentage would be 20/100, or 20%.

So, 20% of the medals were gold, and 45% of them were silver.

45% + 20% = 65%

100% - 65% = 35%

So, 35% of the medals awarded were bronze.

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mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get