Fast which equation is not an identity?

a) 0+7=7

b) 1∙9=9

c) x+3=3+x

d) x+1=x

21. which equation has no solution?

a. 7y + 9 = −7y − 9

b. 5x + 2 = 5x − 3

c. 4v − 3 = 4v + 6 − v

d. 2z + 1 = 3z − z + 1

22. solve the following equation

3x + 4 = 5x − 10

23. solve the following equation
2(2x + 1) = 4x − 5

24. solve the following equation
−2x − 2 = 2(3x − 1) − 4(−6 + 5x)

The first answer to your first question is option D, write down your equations in a notebook and start writing stuff down so you can learn well. Your doing great

Step-by-step explanation:

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

salary

step-by-step explanation: