Lauren and christy made a total of $17.20 selling cookies and lemonade. the equation below describes the relationship between the number of cookies sold, x, and the number of glasses of lemonade sold, y.

0.50x + 1.10y = 17.20

what do the coefficients 0.50 and 1.10 represent?
a.
lauren and christy sold cookies for $0.50 each and glasses of lemonade for $1.10 each.

b.
lauren and christy made $1.10 selling cookies and $0.50 selling glasses of lemonade.

c.
lauren and christy made $1.60 per sale.

d.
lauren and christy sold 0.50 cookies and 1.10 glasses of lemonade.

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A.Lauren and Christy sold cookies for $0.50 each and glasses of lemonade for $1.10 each.

To get $17.20 you have to multiply the price of cookies by how many cookies you sold plus the cost of lemonade by how many glasses of lemonades were sold. Hope this helps!

hello!

to begin with, we're given that on earth, a rock weighs 20 pounds, and while on jupiter, that same rock weighs 42 pounds. now, we're trying to find the weight of a rock that weighs 10.5 pounds on earth, on jupiter.

to solve this, first, set up a proportion, cross-multiply, and solve it algebraically.

setting up the proportion is the hardest and the most confusing part of the problem, but it's simple.

if on earth, the rock weighs 20 lbs, and on jupiter it weighs 42 lbs, our first part of our proportion is 20/42 lbs. the second part has to be equal to each other. this means that 10.5 has to be on the numerator of the fraction, and x, the value we're trying to find, has to be on the denominator. remember that the rock weighs 10.5 lbs on earth, and we're trying to find the weight of it on jupiter (which is x).

20/42 = 10.5/x

next, you would cross-multiply.

20x = 42(10.5)

20x = 441

now, solve it algebraically by using division.

x = 22.05 lbs

this can be rounded to 22.1 lbs.

therefore, the weight of the rock on jupiter is 22.1 lbs, the fourth choice.