Find the unit rate:
4.5 miles 2
------------- * ------- = 9 mph
0.5 hour 2
36×3/4
we will simplify it in four's table
9×3=27
Answer:
to the first part of your question there are 100 adult at the park.
and then if the prblem stays proportional there should be 18 adults left and 54 kids in the park
Step-by-step explanation:
Solve both equations for x:
2x+7 = 3
2x = -4
x = -2
Plug x into the equation which contains b:
b(-2) -10 = -2
-2b = 8
b = -4
Answer:
b = -4
x = -2
What you do is to substitute the first number for x and the second for y:
(x+7)y=10
a):
(-9+7)*-5=10
(-2)*-5=10
10=10
yes, it's a solution!
b)
(-8+7)10=10
-1*10=10
-10=10
no, not a solution!
c) (-2+7)2=10
5*2=10
yes, a solution!!
d) (3+7)*5=10
50=10
no, not a solution!
