How do you do 101 and 102?

101) A

102) 80 degrees

Step-by-step explanation:

101)

On number 101, just cross multiple on all choices and then compare.

A) x/y=w/z

Cross multiply: xz=yw

B) w/y=x/z

Cross multiply: wz=xy

C) x/w=z/y

Cross multiply: xy=wz

D) (zw)/(xy)=2/2

Cross multiply: 2zw=2xy

Divide both sides by 2: zw=xy

Therefore A is the only proportion not equivalent to the others.

102)

We are given the angles are 2x,3x, and 4x. W also know these angles will add to be 180 degrees since we have a triangle.

2x+3x+4x=180

Combine like terms:

9x=180

Divide both sides by 9:

x=20

So the angles are:

2x=2(20)=40

3x=3(20)=60

4x=4(20)=80

The larger is 80.

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step-by-step explanation: