Question

Admission to the movies costs $8 for adults and $4 for kids. The total bill for your entire extended family was $72. This scenario can be modeled by the equation 8a + 4k = 72. Which is not a possible combination of adults and kids?

3 adults and 12 kids
5 adults and 6 kids
7 adults and 4 kids
8 adults and 2 kids
please help?

Answer 1

i think that it would be C

Answer 2

because 7 times 8 and 4 times 4 addes up to 72

Answer 3

So you would replace the number of adults and kids in the choices into the equation...I'll do an example....for choice A

8a + 4k = 72

Choice 'a' says

3 adults and 12 kids

So we replace every 'a' we see with 3 and every 'k' we see with 12...so

8(3) + 4(12) = 72
24 + 48 = 72
72 = 72

This IS a possible combination so it is NOT the answer

Answer 4

Remember to read the question...which is NOT a possible combination...so C cannot be correct because like you said....56 + 16 = 72...it works...so it is NOT the answer

Answer 5

ughhhh.... ok let me redo this

Answer 6

Well from the 2 examples we already did...we know it isn't A or C lol...let me know what you get :)

Answer 7

i got B

Answer 8

That would be correct!

40 + 24 does not equal 72

So good work! :)

Answer 9

thank you :) could you help with this type of problem:


Choose the equation below that represents the line passing through the point (-2, -3) with a slope of -6.

y + 3 = -6(x + 2)
y + 2 = 6(x + 3)
y - 3 = -6(x - 2)
y - 2 = 6(x - 3)

Answer 10

This is a point slope form...

\[\large y - y_0 = m(x - x_0)\]

You replace 'm' with your slope
replace y_o with your y value
and replace x_o with your x value...

so it is...?

Answer 11

ummm

Answer 12

So we take that equation

\[\large y - y_0 = m(x - x_0)\]

you have a slope (-6) for which you replace 'm' with

You have an x and a y value (-2 , -3) (x , y) so replace those too

So we put those in the equation...and get....?

Answer 13

okk! i think i understand how those ones are done!

Answer 14

What did you get for the answer choice?