Im a little rusty and because of qaurintine forgot how to do this
3] 2√5∙4√5

Response:

2√5 * 4√5 = 40

Step-by-step explanation:

There are many ways that you can solve this problem. One way is by multiplying the base numbers first, then multiply the radicals, and finally multiplying your two results.  

2√5 * 4√5

First, you can multiply 2 by 4.

2 * 4 = 8

Then, you can multiply √5 by √5.

√5 * √5 = √25 = 5

Finally, we multiply 5 by 8 to get the final answer.

5 * 8 = 40

So, 2√5 * 4√5 = 40

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.