Answer:
B. 10
Step-by-step explanation:
First, we need to recognize that the two triangles are similar (the triangle with a leg value of 21 and the triangle with a leg value of 4 and hypotenuse x)
Let's first label the leg of the second triangle as y.
Then, we can set up this equation

Cross multiplying gives us
84=y^2
So, y=sqrt(84) or 2 sqrt(21).
Now, using the pythagorean theorem, we get
4^2+2sqrt(21)^2=x^2
100=x^2
x=10
Answer:
4 i believe
Step-by-step explanation:
Im so sorry if this is wrong and for being late
Answer:
if we estimate this number its going to be 700,000
To find the final term to compete the square you need to divide the 'x' term by 2 then square it

- equivalent equation