Answer:
21 students were in the class.
Step-by-step explanation:
The information in the question tells you that 4/7 of the class is girls.
That means that the remainder of the class is 1 - 4/7 = 3/7 boys
Let the total in the class = x
(3/7)x = 9 Multiply by 7
(3/7)*7*x = 9 * 7 Simplify the right and left
3x = 63 Divide by 3
3x/3 = 63/3
x = 21
There were 21 students in the class.
Answer:
The answer is 53 or Square Root (sqrt) of 2809
Step-by-step explanation:
a^2+b^2=c^2
28^2+45^2=c^2
784+2025=c^2
c^2=sqrt 2809
c = 53
Using the formula y=200+50x, plug in x=1 to get y=250.
Answer:
a₅₀ = - 137
Step-by-step explanation:
There is a common difference between consecutive terms , that is
7 - 10 = 4 - 7 = 1 - 4 = - 2 - 1 = - 3
This indicates the sequence is arithmetic with nth term
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 10 and d = - 3 , then
= 10 - 3(n - 1) = 10 - 3n + 3 = 13 - 3n
Substitute n = 50 to obtain 50th term
a₅₀ = 13 - 3(50) = 13 - 150 = - 137
Answer:
more detail please
Step-by-step explanation: