Answer: C
Step-by-step explanation:
2j = 2 × j = e
X = # dimes
y = # quarters
x+y = 20 so x = 20 - y
0.1x + 0.25y = 4.1
substitute x = 20 - y into 0.1x + 0.25y = 4.1
0.1x + 0.25y = 4.1
0.1(20 - y) + 0.25y = 4.1
2 - 0.1y + 0.25y = 4.1
0.15y = 2.1
y = 2.1 / 0.15
y = 14
x = 20 - 14 = 6
answer
Dimes: 6 coins
Quarters: 14 coins
Double check
6 + 14 = 20 coins total
6(0.1) + 14(0.25) = 0.6 + 3.5 = $4.10
For number 12 the answer is 15.36
Answer:
A = π(34), or approx. 106.8 units²
Step-by-step explanation:
Recall that the formula for the area of a circle is A = πr².
If (3, 5) is a point on the circle at hand, then the radius (found using the Pythagorean Theorem) is r = √(3² + 5²) = √(9 + 25) = √34.
Then r² = 34, and the area of this circle is
A = π(34), or approx. 106.8 units²
Answer: 1.65
I hope this isn't too late : )
