Answer:
x^2 - (11/2)x + 121/16 = -7
Step-by-step explanation:
-8x-15=25
+15 +15
<u>-8x</u>=<u>40</u>
-8x -8x
x=-5
8.64,36,13.33
question no.4
12% of 72
= 12/100×72
=8.64#
question no.5
18=50×x%
18=0.5x
x=36
= 36% of 50 is 18
question no.6
12=90% of x
12= 0.9x
x= 13.33
= 12 is 90% of 13.33
12
x + y = 6 and xy =2
Left sides multiplied= right sides multiplied
Multiply (x+y) by xy = 6*2
(x+y) xy = 6*2
Distribute
x^2y + xy^2 = 12
