Plug in 2 for x, and -4 for y
2(2)² + 3(2)(-4) - (-4)²
2² = 4(2) = 8
3(2) = 6(-4) = -24
-4² = 16
8 - 24 - 16 = answer
Simplify.
answer = 8 - 40
answer = -32
-32 is your answer
hope this helps
Answer:
$1.5 each
Step-by-step explanation:
Answer:
General solution
<em> θ =</em><em></em>
<em>Put n=1 </em>
<em> θ</em> = 210°
put n =2
<em> θ</em> = 330°
put n=3
<em> θ</em> = 270°
Step-by-step explanation:
<u><em>Explanation:-</em></u>
<em>Given equation </em>
<em> sin 2θ cosθ + cos 2θ sinθ = -1 </em>
<em> we know that </em>
<em>Sin (A+B) = sin A cos B +Cos A sin B </em>
<em> sin( 2θ+θ) = sin (180+90)</em>
<em> = </em><em></em>
<em> sin 3θ = sin (3π/2)</em>
<em>General solution of sinθ = sinα </em>
<em> θ = 2 n π ±α</em>
<em> 3θ = 2 n π ±3π/2</em>
<em> θ =</em><em></em>
<em> θ =</em><em></em>
<em>Put n=1 </em>
<em> θ=</em> = 210°
put n =2
<em> θ=</em> = 330°
Put n=3
<em> θ=</em> = 270°
I believe its 126 square feet.
Answer:
x = 8
y = 10
Step-by-step explanation:
Multiply the first equation by -1
-1 * (-8x + 4y) = -24
8x - 4y = 24 now add this to second equation
8x - 4y - 7x + 4y = 24 - 16 add like terms (keep in mind, -4y will eliminate +4y)
x = 8 to find the value of y we can use this information
-8x + 4y = -24 replace x with 8
-8*8 + 4y = -24
-64 + 4y = -24 add 64 to both sides
4y = 40 divide both sides by 4
y = 10