Mrs. Smythe = x
Daughter = y
x = 2y
(x - 10) + (y - 10) = 46
x - 10 + y - 10 = 46
x + y - 20 = 46
x + y = 66
Put 2y in for x
2y + y = 66
3y = 66
y = 66/3
y = 22
The daughter is 22
The mother = 44
Answer:
1. 2.6
2. 29.1
3. 2490
4 3.4
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
x^2 + 12 x = 40
To complete the square, take the coefficient of the x term
12
Divide by 2
12/2 = 6
Square it
6^2 = 36
Add 36 to each side
Answer:
-6/5 = w
Step-by-step explanation:
-1/2w-3/3=1/3w
Add 1/2 w to each side
-1/2w+ 1/2 w -3/3=1/3w+ 1/2 w
-3/3 = 1/3w+ 1/2 w
-3/3 is 1
-1 = 1/3w+ 1/2 w
Get a common denominator for the right side of 6
-1 = 1/3*2/2 w + 1/2 *3/3 w
-1 = 2/6w + 3/6 w
-1 = 5/6 w
Multiply by 6/5 to isolate w
-1 *6/5 = 5/6*6/5 w
-6/5 = w
