3/10 so out of the 10 7 people score above average because 10-3=7 and 7+3= 10 7 and 3 make a whole please give me points and mark as brainless
Subtract x^2 from both sides
x^2 + 3x - 7 = 5x + 39
Subtract 5x from both sides
x^2 - 2x - 7 = 39
Add 7 to both sides
x^2 - 2x = 46
Complete the square by adding (b/2)^2 to both sides, b = ( -2)
(-2/2) = -1, then square that (-1)^2 = 1
x^2 - 2x + 1 = 46 + 1
Simplify the expression by factoring
(x - 1)^2 = 47
Take square root on each side
x - 1 = (sqrt (47))
Solve for x
x = 1 + (sqrt (47))
Since 47 is prime, 47 cannot be broken down by the square root and this is the answer to your problem.
N, n+1, n+2
(n+1)(n+2)=6(n+n+1)-12
n^2+3n+2=12n+6-12
n^2+3n+2=12n-6
n^2-9n+8=0
n^2-n-8n+8=0
n(n-1)-8(n-1)=0
(n-8)(n-1)=0
So there are actually two solutions that satisfy the conditions for the cousin's ages...
1,2, and 3 years old and 8,9,and 10 years old.
check...
2*3=6(1+2)-12, 6=18-12, 6=6
9*10=6(8+9)-12, 90=102-12, 12=12
Answer:
Step-by-step explanation:
The slope-intercept form of an equation of a line:
<em>m</em><em> - slope</em>
<em>b</em><em> - y-intercept (0, b)</em>
The formula of a slope:
From the graph we have two points (0, 4) → <em>b = 4</em>, and (3, 5).
Calculate the slope:
If you want the equation of a line, then put the value of <em>m</em> and <em>b</em> to the equation of a line:
