You don't say whether this is a right triangle or not.
Assuming it is a right triangle, then we use the Pythagorean Theorem to determine the length of the hypotenuse:
(hypo) = (length of third side) = √(12^2 + 4^2) = √(144+16) = √160 = 4√10.
This is approx. 12.65 inches. Since this does not match any of the possible answer choices, we'll have to take a different approach to answering this question.
Given that 2 sides of the given triangle are 12 and 4 inches, respectively, we see that the 3rd side has to be longer than 8 inches; otherwise we'd have three line segments on the same line, not forming a triangle.
By this reasoning, 9 inches is the only possible answer that could be correct. With sides 12, 9 and 4 inches, the triangle would be obtuse and appear quite flat, but not be part of a straight line as with a third side of 8.
What do you mean, "solve"?
y = -4(x-2)² + 4
the line is a parabol with a maximum (2;4)
it's roots are -4(x-2)² + 4 = 0 => (x-2)² = 1 => x-2 = 1 => x = 3
=> x-2 = -1 => x = 1
symetrical axe: x = 2
is that all you need?
Step-by-step explanation:
a.

b.

Step-by-step explanation:
To convert decimal number 639 to quinary, follow these steps:
- Divide 639 by 5 keeping notice of the quotient and the remainder.
- Continue dividing the quotient by 5 until you get a quotient of zero.
- Then just write out the remainders in the reverse order to get quinary equivalent of decimal number 639.
- Using the above steps, here is the work involved in the solution for converting 639 to quinary number:
- 639 / 5 = 127 with remainder 4
- 127 / 5 = 25 with remainder 2
- 25 / 5 = 5 with remainder 0
- 5 / 5 = 1 with remainder 0
- 1 / 5 = 0 with remainder 1
Then just write down the remainders in the reverse order to get the answer, The decimal number 639 converted to quinary is therefore equal to :
10024