Please hellp please helllp

a) y =

b) x = 4

Step-by-step explanation:

a)

3y + 2 = 20y - 5

2 = 20y - 3y - 5

2 = 17y - 5

2 + 5  = 17y

7 = 17y

y =

b) x² + 5 = 21

x² = 21 - 5

x² = 16

x = √16

x = 4

Check the attachment... hope it helps :)

x= +4 or -4

y= 7/17

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .