If you have not studied this subject yet you might have mis-copied the Q.
<span>xy = 20 </span>
<span>x + y = -6 </span>
<span>x + 20/x + 6 = 0 </span>
<span>x^2 + 6x + 20 = 0 </span>
<span>quadratic formula </span>
<span>Select one solution x = - 3 + sqrt(11)i </span>
<span>y = - 6 - [- 3 + sqrt(11)i] = - 3 - sqrt(11)i</span>
Answer:
n=3 5/7
Step-by-step explanation:
8(n+7) Multiply each term in the parenthesis by 8
8n + 8 x 7
8n + 56
4 - 6n = 8n + 56
move variable to the left by adding its opposite to both sides
-6n - 8n + 4 = 8n - 8n +56
eliminate the opposites
-6n - 8n + 4 = 56
collect like terms by calculating the sum or difference of their coefficients
-6n - 8n
(-6 - 8)n
calculate the difference
-14n
divide both sides of the equation by -14
-14n / (-14) = 52 / (-14)
n = 52 / (-14)
n = -52/14
n= -26/7
alternative form of writing the answer is
n= -3 5/7 or n= 3.71429
Answer:
$32.50
Step-by-step explanation:
Let x = the cost of 5 pumpkin pies
19.50/3 = x /5 Cross multiply
3x = 97.50
x = $32.50
-2 / 1/4
If you are dividing you have to switch 1/4 to 4/1
-2/1 / 4/1
= -8
Hope this helped
Answer:
147cm2
Step-by-step explanation:
area of a circle=πr2
=3*7*7
=147cm2