B is the correct answer. I hope this helps!
Answer:
x = 8
y = -11
Step-by-step explanation:
In this question, we have to find out the value of "x" and "y".
Solve:
Lets solve for y first.
-2(3x + 4y = -20)
6x + 5y = -7
------------
-6x - 8y = 40
6x + 5y = -7
------------
-3y = 33
Divide both sides by -3
y = -11
We now know what the value of "y" is, now we must find the value of x. To do this, we would plug -11 to "y" in one of our equations.
Solve for x:
3x + 4y = -20
3x + 4(-11) = -20
3x - 44 = -20
Add 44 to both sides.
3x = 24
Divide both sides by 3
x = 8
Now we know that our answer are:
x = 8
y = -11
Answer:
250 students
Step-by-step explanation:
100 students ÷ 40% = 250 students
Step-by-step explanation:
We are looking for possible values of n in
5 < √n < 6, where n is a whole number.
(5)² < (√n)² < (6)² is allowed as all are positive.
25 < n < 36
Therefore there are 36 - 25 - 1 = 10 values for n.
Answer:
A and C ....................................