Answer:
(x+5/2)^2 = 0
Step-by-step explanation:
4 x^{2} +20x +25 =0
Divide by 4
4/4 x^{2} +20/4x +25/4 =0
x^2 +5x +25/4 =0
Subtract 25/4 from each side
x^2 +5x +25/4 -25/4 =-25/4
x^2 +5x =-25/4
Take the coefficent of x
5
Divide by 2
5/2
Square it
25/4
Add it to each side
x^2 +5x +25/4 =-25/4+25/4
(x+5/2)^2 = 0
Take the square root of each side
x+5/2 = 0
x = -5/2
Answer:
B
Step-by-step explanation:
Answer:
Well if the angle is drawn to scale you can use a protractor.
But if it’s not you need to divide the known length by the sine of its opposite angle.
So find the sine of the angle opposite to the known length.
<span><span>5/43</span>÷<span>25/86
</span></span><span>=<span>5 × 86/43 × 25
</span></span><span>=<span>430/1075
</span></span><span>=<span>430 ÷ 215/ 1075 ÷ 215
</span></span><span>=<span>2<span>5
</span></span></span>
65,000 really easy once you know
