Answer:
x can be any real number
Step-by-step explanation:
5x<=21+2x
Or
3(x+1)>=24
5x-2x<=21
Or
3x+3>=24
3x<=21, i.e x<=7
Or
3x>=21, i.e x>=7
Since we have OR, at least one of them must be true. So x can be any real number.
Answer:
x = 8/9
Step-by-step explanation:
-4(2x-3) + 4x = 9x -4x +8 -4
2x*(-4) -3*(-4) + 4x = 9x - 4x + 8 - 4
-8x + 12 + 4x = 9x - 4x + 8 - 4 {Combine like terms}
-4x + 12 = 5x + 4
12 = 5x + 4x + 4
12 = 9x + 4
12- 4 = 9x
9x = 8
x = 8/9
Can you write it out and send a picture?
They already give you the number of boys {14}, so all you need to do is subtract 30 - 14 which will give you the ratio of girls.
It does this because 14 takes up 
of the seventh grade class.
So your answer is going to be 14:16 un-simplified.
However, since they ask you to put it in the simplest terms, we are going to simplify 
You can do this by dividing both numbers by 2.
= 
or 
Answer:
Step-by-step explanation:
the first method :
s(x) = 2 - x and f(x) = 3x
(s f) (-7) = s(-7) ×f(-7)
but : s(-7) = 2 - (-7) =2+7 = 9
f(-7) = 3(-7) = - 21
so : (s f) (-7) = (9)×(-21) = - 189
the second method :
calculate : (s f) (x) == s(x)×f(x) = (2-x) 3x = 6x - 3x²
(s f) (-7) = 6(-7) -3 (-7)² = - 42 -147 = -189
