Use Topic 7 Assessment1
Due OS
In 4-7, use the table.
Area
Color
Black
Red
Green
Tile Size
3 in. x 3 in.
6 in x 6 in.
9 in. x 9 in.
5. Dennis wants to tile the surface of a rectangular storage case that is 27 inches long, 18 inches
wide, and 9 inches tall. If he uses all green tiles, how many tiles will he need?
tiles
(Type a whole number.)
6. If Dennis uses all black tiles, how many tiles does he need?
tiles
(Type a whole number.)
X
1
V
va
(1.0
More

Solution: x2+4x=276x=27,x=9/2answer: no

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!