Answer:
a. You have chosen 20 ft for the perimeter.
b. l = 10 - w
Step-by-step explanation:
b. You are told to solve the formula for l. Presumably, you are to put your number in place of P.
20 = 2l + 2w
10 = l + w . . . . . divide by 2 (because we can. It simplifies the expression.)
To solve for l, we subtract w from both sides of the equation.
10 - w = l + w - w
10 - w = l . . . . . an expression for the length of the cage in terms of w
W = white keys
b = black keys
w + b = 88
We know the number of black keys, it is 36
w + 36 = 88
w + 36 - 36 = 88 - 36
w = 52
So, the number of white keys is 52.
Now, we can write the ratio.
It would be :
b : w
36 : 52
Let's simplify . . .
They are both divisible by 4:
36/4 : 52/4
Simplifies to . . .
9 : 13
So, the ratio is 9 black keys: 13 white keys.
Final Answer: 9 black keys : 13 white keys
*I looked to see if this was actually true on a real piano, and it was!
Answer:
3 * 9 = 27
Step-by-step explanation:
Answer:
{-8, 8}
Step-by-step explanation:
Simplify 7· |n| = 56 by dividing both sides by 7:
|n| = 8
Because this is an absolute value equation, there are two separate solutions. One is n = +8 and the other is n = -8.