We know there is 57 members are in the math club and there is twice as many sixth grades than the seventh. To find out how many sixth graders are in the club, we do:
x = seventh graders
2x = sixth graders
2x + x = 3x
57=3x
57 ÷ 3 = 3x ÷3
19 = x
So there is 19 seventh graders and 19×2= 38 sixth graders
Answer:
f(x) = (x^2 + 5) - 3
Step-by-step explanation:
Answer:
14.95
Step-by-step explanation:
Use a median calculator
Answer:
<h2>
18 , 20</h2>
Step-by-step explanation:
Let the numbers be x and y
Sum = x + y
Sum = one number + 20
Cancel equal terms on both sides of the equation.
Again,
Finding another number
Sum = other number + 18
Cancel equal terms on both sides of the equation
Hence, The two numbers are 18 and 20.
Hope this helps..
Best regards!
Answer:
Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean), or expected value. A low standard deviation means that most of the numbers are close to the average. A high standard deviation means that the numbers are more spread out.