50 points please help. i need the answers for A through e. i got 30, 60, 11, 80, and 8 but its saying theyre wrong. im not really sure what i did wrong tho. thanks!

.

A)

y = 60°

B)

x = 11

∡YXW = 82°

∡WXZ = 8°

Step-by-step explanation:

A)

y, x are complementory angles

then:

x + y = 90

.y = 2x

then:

x + 2x= 90°

3x = 90°

x = 90/3

x = 30

y = 2x

y = 2*30

y = 60°

B)

Angle YXW an angle WXZ are complementory angles:

then:

(7x+5) + (3x-25) = 90°

7x + 3x + 5 - 25 = 90

10x -20 = 90

10x = 90 + 20

10x = 110

x = 110/10

x = 11

then:

7x+5 = 7*11 + 5 = 77 + 5 = 82°

3x - 25 = 3*11 - 25 = 33 - 25 = 8°

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )