20 - 3 = 10x
17 = 10x
17/10 = x
Draw a right triangle (attachment below):
Length of the vertical line = 6 units
Length of horizontal line = 8 units
a^2 + b^2 = c^2
6^2 + 8^2 = 100
Square root of 100 = 10
The distance between the two points is 10 units.
Answer:
She used 1/8 or 12.5% more flour than sugar
Step-by-step explanation:
flour: 5/8
sugar: 1/2 = 4/8
0.125 = 12.5%
Let xy be this number, where x is the tens and y, the units.(xy is not the product of x times y, it's just a number with 2 digits))
(Mind you xy can be written as 10x+y, just like 25 - 2.10 + 5)
Now let's translate English into Math:
1) x+y =7 (note that the reverse of xy is yx or 10y+x)
2) 10y+x = (10x+y) -9 →-9x +9y = -9
1) x+y =7
2) - 9x +11y = -9
Solving these equations will give:
x = x=4 and y = 3. Hence the number is 43
Step-by-step explanation: