70 points!! The revenue equation for a certain brand of toothpaste is y=2.2x, where x is the number of tubes of toothpaste sold and y is the total income for selling X tubes. The cost equation is y=0.6x+3000, where X is the number of tubes of toothpaste manufactured and y is the cost of producing X tubes. For what X-values will the company make a profit?

The company will make a profit for X-values: (greater than, less than, or equal to) ___?

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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how many friends does he have? i think some of the information got cut off in the problem.