2x^2+20x=-38 divide both sides by 2
x^2+10x=-19, halve the linear coefficient, square it, than add that value to both sides of the equation, in this case add (10/2)^2=25...
x^2+10x+25=6 now the left side is a perfect square
(x+5)^2=6 take the square root of both sides
x+5=±√6 subtract 5 from both sides
x=-5±√6 (so answer c.)
Answer: Slope = -5/6
Step-by-step explanation:
(y1-y2) / (x1-x2)
(-2-8) / (20-8)
-10/12
-5/6
Hope this helps!
Answer:
400 cm²
Step-by-step explanation:
25÷20 = 1.25
Area = 1.25 × 320
= 400 cm²
Answer:
Using 3.14 for pi
835.24 cm^2
Using the pi button for pi
835.6636459 cm^2
Step-by-step explanation:
The surface area of a cylinder is given by
SA = 2 pi r^2 + 2 pi r h
= 2 * pi ( 7)^2 + 2 pi ( 7) * 12
= 98 pi + 168 pi
=266 pi
Using 3.14 for pi
835.24 cm^2
Using the pi button for pi
835.6636459 cm^2
B) Find the possible values of $z$ in exponential forms
