In order to show that variable a causes variable b, you need to variable a.

Change

Step-by-step explanation:

Here there are two variables a and b.

a is causing variable b.

In other words, a is an independent variable which can take any values, and b takes values depending on the value of a.

Examples are:  b=ma+k or b =2a^2 etc.

Whenever we change a there is a change in b.

But it should be noted when there is a change in b, there is a change in a also.

However, normally a is changed first and b is derived from a.

Hence the statement

In order to show that variable a causes variable b, you need to change variable

a.

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.