Hi Brainiac
2/5 + p = 4/5 + 3/5 p
Simplify
p + 2/5 = 3/5 p + 4/5
Subtract 3/5p from both sides
p + 2/5 -3/5p = 3/5p + 4/5 -3/5 p
2/5 p + 2/5 =4/5
Subtract 2/5 from both sides
2/5 p +2/5 -2/5 = 4/5 -2/5
2/5 p = 2/5
Divide both sides by 2/5
2/5 p / 2/5 = 2/5 /2/5
p = 1
I hope that's help:)
Multiply each side by 4 then divide by three. The answer is C.
Answer:
The mean of the test is 65
Step-by-step explanation:
Let the mean be x and SD be y
3 SD BELOW the mean means that we are taking away 3 SD FROM the mean
Mathematically, we have that as;
x - 3y = 41 •••••(i)
73 is 1 SD above mean
Mathematically;
x + y = 73 ••••••••(ii)
So let us solve both equations simultaneously
Simply multiply equation ii by 3 then add to i
x - 3y = 41
3x + 3y =219
4x = 41 + 219
4x = 260
x = 260/4
x = 65
Equations
a1+o1=108
a2+o2=452
a1x5=a2
o1x3=o2
Solving for # of oranges sold first week.
5a1+3o1=452
a1=108-o1
5(108-o1)+3o1=452
540-5o1+3o1=452
540-2o1=452
88=2o1
o1=44
Solving for # of apples sold first week.
a1+44=108
a1=64
64 apples were sold the first week and 44 oranges were sold the first week.
The second week sold 320 apples and 132 oranges. I hope you understand my work.
