Answer:
-52/7
Step-by-step explanation:
Dont care just do it or check it
We will use the Pythagorean theorem:
c² = a² + b²
41² = 40² + b²
1681 = 1600 + b²
b² = 1681 - 1600
b² = 81
b = √ 81
b = 9 in
Answer: The length of the other leg is 9 inches.
Answer:
x=0
Step-by-step explanation:
Because there's no diagram
Let's say she invested "a" amount at 7% and "b" amount at 9%
we know, whatever "a" and "b" are, they add up to 15000, thus
a + b = 15000
how much is 7% of a? well, (7/100) * a, or 0.07a
how much is 9% of b? well, (9/100) * b, or 0.09b
we know the sum of the interest for both is 1230, thus
0.07a + 0.09b = 1230
thus
solve for "a", to see how much was invested at 7%
what about "b"? well, b = 15000 - a