Guys please help me with my math, it's due tomorrow. 1. Dave is 8 years older than Nelly. How will you represent Dave's age in terms of Nelly's age?

2. The length of a rectangle is thrice its width. How will you represent the perimeter of the rectangle in terms of its width?

3. The square of a number minuz the original number is equal to 20. What equation should be used to find the number?

5 & 6 in the pic

b

step-by-step explanation:

x/3-10=8

x/3=18

x=48

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.