Answer:
Adult=58
Step-by-step explanation:
c=child, a=adult
6.4c+9.7a=1145 equation 1
c+a=149 equation 2
a=149-c modified equation 2 to isolate a
6.4c+9.7(149-c)=1145 substitute value of a from equation 1 into equation 2
6.4c+1445.3-9.7c=1145
-3.3c=-300.3
c=91
solve for a
c+a=149
91+a=149
a=58
Check answer:
6.4c+9.7a=1145
6.4(91)+9.7(58)=1145
582.40+562.60=1145
1145=1145
im just testing this but if you did that you would be slow as heck.
17 minutes is decent so...
Use area of trap formula and special right triangles
A = (.5)(10 + 18)(5)
state whether this function is quadratic? why or why not?
f(x) = - 3(x - 2)(x + 3)(x + 5)
