Question

Saturday morning there were 7 adults and 20 kids at Pump and Jump Land. The morning cash registers show $236 were collected. In the afternoon there were 21 adults and 50 kids for a total amount of $618. What is the cost for 1 adult?

Answer 1

\[\Large \begin{array}{l}
7x + 20y = 236\\
21x + 50y = 618
\end{array}\]
Solve system.

Answer 2

7a + 20k = 236
21a + 50k = 618

Answer 3

i can eliminate the x value right

Answer 4

You can eliminate whatever you want. As long as you get the right answer

Answer 5

i got y =-9 and x=59.43

Answer 6

\[\Large \begin{array}{l}
\left[ {\begin{array}{*{20}{c}}
7&{20}\\
{21}&{50}
\end{array}} \right] = \left[ {\begin{array}{*{20}{c}}
{236}\\
{618}
\end{array}} \right]\\
\left[ {\begin{array}{*{20}{c}}
7&{20}\\
0&{ - 10}
\end{array}} \right] = \left[ {\begin{array}{*{20}{c}}
{236}\\
{ - 90}
\end{array}} \right]\begin{array}{*{20}{c}}
{{R_1}}\\
{{R_2} - 3 \cdot {R_1}}
\end{array}\\
y = \frac{{ - 90}}{{ - 10}} = 9\\
x = \frac{{236 - 9 \cdot 20}}{7} = {\rm{8}}
\end{array}\]

Answer 7

Hey fewscrewsmissing! What's the size of your font? :P

Answer 8

Large =)
I just add \Large to the first line of latex inside the opening brackets.

Answer 9

I think you have too add "large" at least three times to get a font that huge :P

Answer 10

Haha it's "Large" with a capital L. large > Large > LARGE I think (case-sensitive).

Answer 11

Er you know what I mean ;)

Answer 12

Yeah, I know how to use it ;)