Answer: 7/3
Step-by-step explanation: let the original real number be x. After moving the decimal point of this real number two digits to the right, the number becomes 100x. The positive difference between the two numbers is 100x - x = 99x. Dividing the difference by 11, we have 99x/11 = 9x, which we are told is 21, so we have the equation 9x = 21/9, which equals 7/3. Thus, the original real number is 7/3.
Answer:
the bikers speed is 11mph
Step-by-step explanation:
Answer:
y = (5/7)x + 3
Step-by-step explanation:
We use the form y = mx + b. Substituting (5/7) for m, 7 for x and 8 for y, we get:
8 = (5/7)(7) + b, or 8 = 5 + b. Thus, b = 3, and the desired equation is
y = (5/7)x + 3
Answer:
common denominator of 1/a + 1/b is ab
however simplifying the complex fraction gives: (b-a)/(b +a)
Step-by-step explanation:
common denominator of 1/a + 1/b
should be the product of the denominators
a*b
so 1/a + 1/b = (b + a)/ab
ao
( 1/a - 1/b) divided by (1/a + 1/b) = (b - a)/(ab) divided by (b+a)/ab