Answer:
66
Step-by-step explanation:
Use the formula for the mean of a set of numbers:
sum of the numbers
average = --------------------------------
count of numbers
Here we know that the average mark was 68, so we can write:
75 + 62 + 84 + 53 + x
average = 68 = ----------------------------------
5
or 274 + x
68 = -------------------
5
Solving for x, we multiply both sides by 5: 340 = 274 + x.
Subtracting 274 from both sides effectively isolates x:
340 = 274 + x
- 274 -274
------------------------
66 = x
The fifth student's mark was 66.
Does that say 4 x 8x + 1 = 2(squared)x?
Answer:
65ft
Step-by-step explanation:
Pythagoreom therom
45/75 = 30/x
30*75 = 2250/45 = 50
EF = 50 in.
Answer:
it would be y= 3/4x + 2
Step-by-step explanation:
the form is y=mx+b
and you have to set it up as 8y=16-6x
Divide each term
Cancel the common factor of 8.
Divide y by 1
then simplify and turn it into a fraction.
