Solving the equation 
using completing square method we get 
So, Option A is correct.
Step-by-step explanation:
We need to solve the equation using completing square method.
Solving using completing square method
For completing the square we need to make formula a^2-2ab+b^2=(a-b)^2
Divide the equations by 2
Adding and subtracting (3)^2 on both sides.
Solving the equation using completing square method we get
So, Option A is correct.
Keywords: Solving Quadratic Equation
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Step-by-step explanation:
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Answer:
x=1
Step-by-step explanation:
x+3x+5x+7x+...+49x=625
(1+3+5+7+...+49)x=625 (1)
now consider s= 1+3+5+7+...+49
a=1
d=3-1=2
l=49
l=a+(n-1)d
49=1+(n-1)2
49-1=(n-1)2
48/2=n-1
n-1=24
n=24+1=25
s=n/2*(a+l)
s=25/2(1+49)
x=25/2×50
s=25×25=625
from (1)
625 x=625
x=625/625=1
We are given x so we can plug it in to the first equation to find y
11 - y = 6
We don’t want y to be negative so we subtract y from both sides
11 = 6 + y
Now we can subtract 6 from both sides
5 = y
Answer:
Mean
Step-by-step explanation:
Adding up and dividing to find the mean.
We simply add up all of the individual grades, get the total, and then divide by the number of students in the class.
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