A local car wash cahreges $8 per wash and $10 per wash and wax...?

at the end of a certian day, the total sales were $3100. write a model that shows the different numbers of the two types of car washes. then find the number of wash and waxes there were if 200 were washes onlyA local car wash cahreges $8 per wash and $10 per wash and wax...?
$3100 total sales


- 200 washes @ $8.00 each=$1600


Leaves a balance of $1500


divide that by $10 for a wash %26amp; wax=150





you fine tune the details...A local car wash cahreges $8 per wash and $10 per wash and wax...?
8x+10y=3100





Answer: 8(200)+10y=3100


1600+10y=3100


10y=1500


y=150


there were 150 wash and waxes
x = no of wash


y = no wash and wax





8x + 10y = 3100


x = 200


8(200) + 10y = 3100


1600 + 10y = 3100


10y = 1500


y =150





Hope this helps
$1600 in wash only at 200 x $8


$1500 in wash and wax at 150 x $10


=$3100 total
Let x be the number of washes only.


Let y be the number washes and waxes.





8x+10y=3100 is the model





8(200) +10y = 3100


10y = 1500


y = 150 washes and waxes
no thanks
200 times 8 = 1600


10w=3100 - 1600


10w=1500


w= 150 wash/waxes
if 200 were washes, then 110 were waxs
No thanks...you can do your own homework.
Set up the first equation for $8 per wash so 8w and $10 per wash and was so 10s and set them equal to 3100 since you know the total sales





8w + 10s = 3100





They tell you that there were 200 washes so make w = 200


w = 200





8(200) + 10s = 3100


1600 + 10s = 3100


10s = 1500


s = 150





Check:





8(200) + 10(150) = 3100


1600 + 1500 = 3100


3100 = 3100





there were 200 washes and 150 wax and washes