Answer:
1. x=27
2. x=3
Step-by-step explanation:
<h3>the first one </h3>
let's solve your equation step-by-step.
x−7=20
Step 1: Add 7 to both sides.
x−7+7=20+7
<h3>the second one </h3>
Let's solve your equation step-by-step.
3x+6=12x−21
Step 1: Subtract 12x from both sides.
3x+6−12x=12x−21−12x
−9x+6=−21
Step 2: Subtract 6 from both sides.
−9x+6−6=−21−6
−9x=−27
Step 3: Divide both sides by -9.
−9x/−9=−27/−9
<h3 />
Yes, the ordered pair (2,-4) is a solution to the equation.
2 = x
-4 = y
Subtitute x and y
-4=-2-2
-4=-4
Square root 80 = 4 x square root 5
because root 80 = root 16 x root 5
Answer:
D
6sqrt2(cos(20)+I sin (20))
