For this case we propose a system of equations:
x: Let the variable representing the number of children in the concert
y: Let the variable representing the number of adults at the concert
According to the assistance we have:

According to the cost we have:

Substituting the first in the second equation we have:

Thus, the concert was 375 adults.
On the other hand we have:

Thus, the concert was 1125 children.
In total they were:
people
ANswer:
The concert was 1500 people
The degree is the biggest power present in an equation.
The first is 6.
The second is 5.
Be careful with equations that aren't fully expanded.
Hope this helps
Answer:
The truck is hauling 3/4 of a full load
Step-by-step explanation:
we know that
2/3 ton of gravel represent the 100% of a full load
Find out how much of a full load the truck is hauling with 1/2 ton of gravel, using proportion
Let
x ----> the percentage of a full load

Convert to fraction number

therefore
The truck is hauling 3/4 of a full load
-8/5 is the correct answer
The fourth root? There is no simplifying to be done.
The only way to continue work on this is converting to decimal. To four places the answer is 3.3437.
If you meant to ask for the cube root, the answer is 5.