4 - 4y - y² = 0
-y² - 4y + 4 = 0
y = -(-4) ± √((-4)² - 4(4)(-1))
2(-1)
y = 4 ± √(16 + 16)
-2
y = 4 ± √(32)
-2
y = 4 ± 4√(2)
-2
y = 4 + 4√(2) or y = 4 - 4√(2)
-2 -2
y = -2 - 2√(2) or y = -2 + 2√(2)

The answer is C.

8 0

3 years ago

15 liters increased by 60%

kicyunya [14]

15 liters increased by 60% is 24 liters.

8 0

3 years ago

A collection of dimes and nickels is worth $3.30. If there are 42 coins in all, how many nickels are there?

Semmy [17]

Answer:

Step-by-step explanation:

5 0

3 years ago

What is 9pi/5 concerted to degrees? A) 162 B) 350 C) 324 D) 5.7

Charra [1.4K]

Answer:

C) 324

Step-by-step explanation:

A full circle is 2pi radians and 360 degrees. That means that pi radians equals 180 degrees.

$\dfrac{9 \pi}{5} \times \dfrac{180^\circ}{\pi} = 324^\circ$

7 0

4 years ago