Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 . a. 2√ 20 − 4√ 7 − 2√ 5 b. 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 c. 2√ 20 − 3√ 7 + 4√ 63 d. 2√ 5 + 9√ 7

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)

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.

answer: 3.26019516

step-by-step explanation: