Each month, stacey places a portion of her earnings in a retirement account. her savings are invested in two companies. for every $9 invested in company a, $2 is invested in company b. stacey quizzes her children, krista and kevin, about how much money she will invest in company a if she invests $24 in company b. what is the ratio of the amount invested in company a to the amount invested in company b? write the answer as a fraction using the values given. do not include any variables.

We are given that Stacey places a portion of her earnings in a retirement account. For every $9 invested in company A, $2 is invested in company B.

Ratio of amount invested in Company A to Company B = 9:2

Now we are given that she invests $24 in company B

So, let x be the amount she invested in Company A

So, Ratio of amount invested in Company A to Company B = x:24

ATQ

So, she will invest $108 in company A if she invests $24 in company B.

The ratio of the amount invested in company A to the amount invested in company B =

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:

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answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb