Answer: There are 69 adults and 72 children went to the concert.
Step-by-step explanation:
Let x be the number of adults, and y be the number of children.
x + y = 141
3.5x + 2.5y = 421.5
x + y =141
x = 141 - y
3.5(141 - y) + 2.5y = 421.5
493.5 - 3.5y + 2.5y = 421.5
493.5 - y = 421.5
-y = -72
y = 72
x + y = 141
x + 72 = 141
x = 69
1.23/16 = 0.076875 . totally answer
Golden retrievers: 12/32
poodles: 20/32
does it need to be simplified?
1 mile=5280 feet
4 miles=21120 feet
21120×20÷100=4224. As a result, 20% of 4 miles is 4224 feet. Hope it help!
Answer:
h(4) = 0
Step-by-step explanation:
Hoping its ' kx '
![h(x) = x^2 + kx -8 \\\\h(-1) = (-1)^2 + k(-1) - 8\\\\-5 = 1 - k -8\\\\-5 = -k -7\\\\-5 + 7 = -k\\\\2 = -k\\-2 = k](https://tex.z-dn.net/?f=h%28x%29%20%3D%20x%5E2%20%2B%20kx%20-8%20%5C%5C%5C%5Ch%28-1%29%20%3D%20%28-1%29%5E2%20%2B%20k%28-1%29%20-%208%5C%5C%5C%5C-5%20%3D%201%20-%20k%20-8%5C%5C%5C%5C-5%20%3D%20-k%20-7%5C%5C%5C%5C-5%20%2B%207%20%3D%20-k%5C%5C%5C%5C2%20%3D%20-k%5C%5C-2%20%3D%20k)
Now we have k = -2. We will find h(4).
![h(4) = (4)^2 + (-2)(4) - 8 = 16 -8 - 8 = 0](https://tex.z-dn.net/?f=h%284%29%20%3D%20%284%29%5E2%20%2B%20%28-2%29%284%29%20-%208%20%3D%2016%20-8%20-%208%20%3D%200)