Answer:
28
Step-by-step explanation:
So 1% of 350 would be 3.5 because 350 divided by 100 is 3.5. You then get 3.5 and multiply it 8 times, which would be 28. (You multiply it 8 times because 8% is 8 times 1%.)
Answer:
m = 9
Step-by-step explanation:
Using the rules of exponents
= 
× 
⇔ 
= 
Then
× 
= 243 ← express all values to base 3
× 
= 
× 
=
× =
=
Since bases on both sides are equal, both 3 , then equate exponents
- 3m - 4 = 5 ( add 4 to both sides )
- 3m = 9 ( divide both sides by - 3 )
m = - 3
Answer: x = 7 (choice C)
"sum of 1 and 3 times a number" means we have the expression 1+3*x for some unknown number x. This is set equal to 22, and we isolate x. The idea is to follow the order of operations PEMDAS in reverse. So start with subtraction and try to undo it. If it's not present, then undo addition, and so on, until x is all by itself on one side.
1+3x = 22
3x+1 = 22
3x+1-1 = 22-1 ... see note 1 below
3x = 21
3x/3 = 21/3 .... see note 2 below
x = 7
note1: Undoing addition. We undo the "+1" by subtracting 1 from both sides
note2: Undoing multiplication. 3x means "3 times x". The inverse of this is division which means we divide both sides by 3
Simple, 13 students do not take a language class.
8 french students + 12 Spanish students = 20 language students
3 students take both classes so 20 - 3 = 17 language students.
30 - 17 = 13
Therefore 13 students neither take Spanish nor French.
