[ (12 - n)/7 ] = -1
12- n = -7
-n = -19
n = 19
Fist of all, y = 8 and x = 3 is more likely to be understood as a ratio. So for the rest of the answer, their relationship would be represented as y:x
Thus: y:x = 8:3
The problem would be finding y when x = 45
Let us proceed on using the previous equation and substitute x with 45 which would look like this:
y:45 = 8:3
Ratios can also be expressed as fractions which would make things more understandable and easy to solve. So the new form of our equation would be like this:
y/45 = 8/3
Then we proceed with a cross multiplication where the equation becomes like as what is shown below:
3y = 45 * 8
From there, you can solve it by multiplying 45 and 8 then dividing the product with 3 to get y
3y = 360
y = 120
Another way of looking at the problem, especially problems like these, is to take the whole question or statement as an equation. it would probably look like this:
y = 8 when x = 3 : y = ? when x = 45
This would make you understand what approach you can use to solve the given problem.
Answer:
The answer is C.
Step-by-step explanation:
2x+1+x+4
3x+5
Answer:
y = -1/4 (x + 2)² + 4
Step-by-step explanation:
y = -1/4x² - x + 3
y = - 1/4 ( x² + 4x - 12)
y = -1/4 (x² + 4x + 4) + 3 + 1
Y = -1/4 (x + 2)² + 4
