The height of this object (in feet) can be modeled by the expression , ?????
Need the expression......
4(5y-1)-1(y-5) =
20y -4 -y+5 =
19y + 1
(2/5) / (5/8)
= 2/5 * 8/5
Expand:
= 9x^2 + 12xy + 3x + 12xy + 16y^2 + 4y + 3x + 4y + 1 Gather 'like' terms.......
Find unit cost
429 / 300 = 1.43 cents per gram
100g * 1.43 c/g = 143 cents ( or $1.43)
1000g * 1.43 c/gm = 1430 cents
2000c / 1.43 c/g = 1398.60 g
11 + x-3 = 2x-2
10 = x
Factors of -11 are 1 -11 and -1 11
(7x+1)(x-11)
(7x-1)(x+11)
(7x-11)(x+1)
(7x+11)(x-1) n can then be -76 76 -4 +4
(x + 13)^2 = (3x + 7)(2x + 4) =
x^2 + 26x + 169 = 6x^2 +26x +28
5x^2 = 141`
x^2 = 141/5
Multiply equation 1 by 2
-2z-2y-2z = -16 add to equation 3
-2y = -12 y = 6
sub this into equation 2
-4x+5z = -17 and multiply equation 3 by 2
4x +4z = 8 add these equations
9z = -9 z = -1
sub in this result to equation 3
2x + 2(-1) = 4
x = 3
Salt in 8% solution = .08 ( 200) = 16
How many cc are needed to make 12% with starting 16
.12 x = 16
x = 133.33 cc so 200 - 133.33 = 66 2/3 water to be evaporated
