Answer:
20 students offered both physics and biology.
Step-by-step explanation:
n(Total) = 50
n(Physics) = 40
n(Biology) = 30
Let n(Physics and Biology) = x
n(Physics only) = 40 -x
n(Biology only) = 30 - x
40 - x + 30 - x + x = 50
70 - x = 50
x = 20
Answer:
(2x-1)(x+3)
Step-by-step explanation:
2x^2+5x-3
2x^2-x+6x-3
x(2x^2/x - x/x) +3(2*3x/3 - 3/3)
(2x-1)(x+3)
first number is x , second number is y
y = x-6
so answer is B 22-6 = 16
B (22,16)
Answer:
3(2x-5)
Step-by-step explanation:
hope this is correct! <3
Answer:
We will take two angles and name them 'x'
And their sum must equal 180
So,
x + x = 180
2x = 180
x = 180/90
x = 90
Hence, it is proved that the bisector of the vertical angle of isosceles triangle is the perpendicular bisector of the base.
