Answer: k = {8, -8}
<u>Step-by-step explanation:</u>
In order for a quadratic equation to have exactly one solution, the discriminant must equal zero. → b² - 4ac = 0
4x² + kx + 4 = 0
↓ ↓ ↓
a=4 b=k c=4
b² - 4ac = 0
k² - 4(4)(4) = 0
k² = 64
k = √64
k = ± 8
Answer:
y = -8/9
Step-by-step explanation:
1. 2(4) - 4y = 20
8 -4y = 20
8-8 -4y = 20 - 8
-4/-4y = 12/-4
y = -3
Answer:
The approximate solution to the system is
.
Step-by-step explanation:
To solve the system of equations
you must:




The approximate solutions to the system of equations are:

Answer:
7 track practices.
Step-by-step explanation:
36 miles - 8 miles she already ran= 28 miles left to run.
28 divided by 4 (miles) = 7.