They are complementary and add up to 90 x + 2x+54 = 90 3x + 54 = 90 3x = 36 x=12 12 and 78

They are complementary and add up to 90 x + 2x+54 = 90 3x + 54 = 90 3x = 36 x=12 12 and 78

Yes 3x + 3 - 4y + 4 = 13 5x + 10 - 2y - 6 = 0 3x - 4y + 7 = 13 5x - 2y +4 = 0 3x - 4y = 6 5x - 2y = -4 -7x = 14 x=-2 y=-3 CHECK: 3(-2...

The sum of two numbers is 144. The second number is 20% of the first number. What are the numbers? (answer)

X+Y=144 X/5 = Y X + X/5 = 144 5X + X = 720 6X = 720 X=120 Y=24

w(3w-8) = 3.5 3w^2 - 8w - 3.5 = 0 30w^2 - 80w - 35 = 0 6w^2 - 16w - 7 = 0 w = [16 +or- sqrt ( 256 + 4*6*7)]/12 (4/3) +or- sqrt(256 + 126)/12 (4/3) +or- sqrt( 382)/12 (4/3)...

3x <= 6 OR x>=0 X<=2 or x>=0

180 km = 180 000 meters = 18 000 000 cm 18 000 000 ------------ 500 000 = 36

27 + 15 = 42

The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. (answer)

X-Y = 9 ---> X = Y+9 5Y = 3X+7 5Y = 3(Y+9) + 7 5Y = 3Y + 27 + 7 5Y = 3Y + 34 2Y = 34 Y=17 X=26

7/8 So if each pizza is cut into 8 slices, each boy gets 7 slices because 7x8=56 7/8

R = O - 10 O = 2R r = 2r - 10 0 = r - 10 r=10 O=20

Ax + 3x - Bx = 5 x(A+3-B) = 5 x = 5/(A+3-B)

1st odd integer is X 2nd odd integer is X+2 3rd off integer is X+4 X + 2(x+2) + 3(x+4) = 58 x + 2x + 4 + 3x + 12 = 58 6x + 16 = 58 6x = 42 x=7 7.9,11 7 + 2x9 + 3x11= 7+18+33...

4 x 4 = 16 4.2 x 4.2 = 17.64 The difference of the area is 1.64

K is how much longer the LENGTH is from the width. X + X + x+k + x + k = 96 4x + 2k = 96 4x = 96 - 2k x = (96-2k)/4 = 24 - (1/2)k So K is how...

3/40 = ? / 140 40 * ? = 3 * 140 40 * ? = 420 4 * ? = 42 2 * ? = 21 ? = 21/2 10 or 11

a pair of pants with a marked price of $35.00 has a discount of 20% how much is the discount (answer)

20% of $35 = 20/100 * 35 = 20/100 * 35/1 = 700/100 = 7 $7 off

10x-14> =0 10x> =14 x> =14/10 = 7/5 x> =7/5 [7/5, infinity)

what is 42R-18 (answer)

6 ( 7R - 3)

The least common denominator is 18 7/9 vs 5/6 <---- multiplies 7/9 * 2/2 and 5/6 * 3/3 14/18 vs 15/18 So 7/9 = 14/18 < 15/18 = 5/6 The difference is 1/18

11 - -4 = 11 + 4 = 15