We know that
applying the law of cosines
a² = b²+ c²<span> – 2*b*c*cos(A)
</span>
in this problem
a=?
b=20
c=9
A=90°
so
a² = b²+ c² – 2*b*c*cos(A)
but
cos (A)=0
a² = b²+ c²-----> 20²+9²----> a²=400+81----> a²=481-----> a=√481
a=21.93-----> a=22
the answer is
22


Step-by-step explanation:

- <em><u>distribute</u></em><em><u> </u></em>4 through the parentheses


- move the <em><u>variable</u></em><u> </u>to the left hand side and change its sign

- move the <em><u>constant </u></em>to the right hand side and change its sign

- collect<em><u> like</u></em><em><u> terms</u></em>
<em><u>
</u></em>

- divide both sides of the equation by <em>-</em><em>5</em>
<em>
</em>
<h2>
<em><u>hope</u></em><em><u> it</u></em><em><u> helps</u></em></h2>
3000000÷1.125=2666666.6667
Round off to 2666667 people.
Feel free to correct this if wrong.
The 1st choice, the third and the fifth are correct
because 26/9 = 3
and 12/4 = 3
and 21/7 = 3
Answer:
A. 6x + 12 = 7x - 8.
Step-by-step explanation:
The opposite angles of a parallelogram are equal so its the first choice.
6x + 12 = 7x - 8.