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
I would say the object will float because the density of water is 999.99kg/m which is slightly less than 1g but still more than the object.
Answer:
90 men
Step-by-step explanation:
just keep the ratio constant
3:7
equals 10 parts
300/10=30
3*30:7*30
90 men and 210 women
hope this helps!!! :)
Answer:
in what number is the question ate
The number is 142
you first make an equation ;
86+x=2x-56
Add 56 to both sides
142+x=2x
Subtract x from both sides
142=x
