Answer:
A≈38.52cm²
Step-by-step explanation:
Using the formulas
A=πr2
C=2πr
Solving for A
A=C2/4π = 22 2/4·π≈38.5155cm²
X^4 + 2x^2 - 24
= (x^2 + 6)(x^2 - 4)
= (x^2 + 6)(x - 2)(x + 2)
x^4 - 9x^2 + 18
= (x^2 - 6)(x^2 - 3)
Answer:
Step-by-step explanation:
n and d are the number of nickels and dimes, respectively.
"there are 20 coins"
n+d = 20
d = 20-n
"total value is $1.40"
0.05n + 0.10d = 1.40
0.05n + 0.10(20-n) = 1.40
-0.05n + 2 = 1.40
0.05n = 0.6
n = 12
d = 20-m = 8
Answer:
Step-by-step explanation:
the first pic is correct
the answer for the second is 2 students
the answer for the third pic is Karen i think
Answer:
B
Step-by-step explanation:
