Answer:
Step-by-step explanation: see attachment below
i dont know how to solve but it can be seen that only three student scored higer than 65. if you want to solve it thn just minus 65 from each test scored by a student if result will more 0 then it means he scored higher than 65
and just count that no. of students.
Answer:
86°
Step-by-step explanation:
b = 29× 2 = 58
d= [180-(86+29)]×2 = 130
a=c=x
a+b+c+d = 360
2x+188= 360
2x= 172
x= 86
a = c = 86°
Answer:
(D^2 + 9)y = cos 2x….(1). The corresponding homogeneous equation is (D^2 +9)y= 0,…(2), whose auxiliary equation is m^2 + 9 = 0, which has (+/-)3i as roots. The general solution of (2) is y = A.cos(3x) + B.sin(3x). Now to get a general solution of (1) we have just to add to the above, a particular solution of (1). One such solution is [cos(2x)]/[-2^2 +9] = (1/5).cos 2x. Hence a general solution of the given equation is given by y = A.cos(3x) + B.sin(3x) + (1/5)cos(2x), where A and B are arbitrary constants. The above solution incorporates all the solutions of the given equation.
Step-by-step explanation:
Well, 3/12 is like 1/4. So if only one fourth of her bows are red, then that means 3/4s aren't. 1/4 is the same as 25%. So 75% of Janica's bows aren't red.
