Answer:
35 students.
Step-by-step explanation:
If there are 100 students at the school and 35% of them voted for the bear, it means 35 students voted for the bear (100*0.35=35).
Step-by-step explanation:
z = 0 -7i ....................
Take the numerator of the fraction and factor it out.

Your fraction should now look like this:

Because (x+4) is present in both the numerator and denominator, you can cross it out. You should be left with
only (x-1) in the numerator.
x cannot equal -4, as if it is inputted in the denominator, -4 + 4 would equal 0. Dividing by 0 is impossible.
Answer:
16
Step-by-step explanation:
Use a special rule: BD^2=AD*DC (the squared height in right triangle drawn to hypotenuse is equal to the product of the parts of hypotenuse on which height divides the hypotenuse) 12^2=9*DC
DC=16
You have the ratio set up correctly:
2x+2/12 = x+3/21
Now cross multiply:
2x+2 * 12 = x+3 * 21
Simplify:
24x + 24 = 21x + 63
Subtract 24 from each side:
24x = 21x + 39
Subtract 21x from each side:
3x = 39
Divide both sides by 3:
x = 39/3
x = 13