## anonymous one year ago fan medal and testimony help!!!. What is the solution to the equation 1.2m − 0.8 = −2.0m? m = 0.25 m = 0.4 m = 1 m = 4

1. Mehek14

2. anonymous

3.2

3. Mehek14

4. anonymous

0.8

5. Mehek14

so you have $$3.2m = 0.8$$ now divide $$\dfrac{0.8}{3.2}$$

6. anonymous

0.25

7. Mehek14

$$m=0.25$$

8. anonymous

thanks can you help with a couple more

9. Mehek14

sure

10. anonymous

11. Mehek14

^_^

12. anonymous

Which statement is true about the equation fraction 3 over 4z − fraction 1 over 4z + 1 = fraction 2 over 4z + 1? It has no solution. It has one solution. It has two solutions. It has infinitely many solutions.

13. anonymous

DO YOU KNOW HOW TO

14. anonymous

oops cap lock sorry

15. Mehek14

$$\dfrac{3}{4z}-\dfrac{1}{4z+1}=\dfrac{2}{4z+1}$$

16. Mehek14

$$\dfrac{3}{4z}=\dfrac{3}{4z+1}$$

17. anonymous

i dont know how to do that :(

18. Mehek14

$$\dfrac{4}{3}*\dfrac{3}{4z+1}$$

19. anonymous

what is z

20. anonymous

im sorry i am a very slow learner and horrible at math

21. anonymous

can you explain more?

22. Mehek14

hold on

23. anonymous

k

24. anonymous

Which statement is true about the equation fraction 3 over 4z − fraction 1 over 4z + 1 = fraction 2 over 4z + 1? It has no solution. It has one solution. It has two solutions. It has infinitely many solutions.

25. anonymous

lol i just wanna see it cuz the other one went up

26. Mehek14

I'm getting no solution

27. anonymous

@Mehek14 thanks for trying

28. Mehek14

np

29. anonymous

@Nnesha can you help

30. anonymous

@brittanyirvinn @beckyjeanwilson @brybry245 @brandonptv3

31. anonymous

it this question below Which statement is true about the equation fraction 3 over 4z − fraction 1 over 4z + 1 = fraction 2 over 4z + 1? It has no solution. It has one solution. It has two solutions. It has infinitely many solutions.

32. Nnesha

$\huge\rm \frac{ 3 }{ 4z } -\frac{ 1 }{4z+1 } = \frac{ 2 }{ 4z+1 }$ like this ?

33. anonymous

yeah but i dont get how to do that

34. Nnesha

first of all solve left side find common denominator

35. anonymous

4z + 4z

36. Nnesha

when you multiply same bases you should add their exponents so 4z times 4z= ?

37. anonymous

16z

38. Nnesha

common denominator is 4z(4z+1) so distribute parentheses by 4z when u multiply same bases you should add exponents $\huge\rm x^m \times x^n = x^{m+n}$

39. anonymous

wow i mind is BLOWN!!!

40. anonymous

i dont get it :(

41. anonymous

im sry

42. Nnesha

4z times 4z =(4 times 4)(z times z)

43. Nnesha

z times z equal what ?

44. anonymous

16 and 2z

45. anonymous

z=8?

46. Nnesha

nope add their exponents z is same as z to the one power $z^1 \times z^1 = z^{1+1}$

47. anonymous

ok i dont get it im sorry

48. anonymous

if you dont want to help me thats okay cuz this will take a long time

49. Nnesha

here are examples $\huge\rm x^2 \times x^2 = x^{2+2}$ $\huge\rm 2^3 \times 2^3 = 2^{3+3}$ this is an exponent rule when we multiply same bases we add their exponents

50. anonymous

ok

51. Nnesha

|dw:1437580573519:dw|

52. Nnesha

so z times z=what ?

53. anonymous

z to the power of 2 ?!?

54. Nnesha

yes right

55. Nnesha

so 16z^2 + 4z

56. anonymous

YAYY FINALLY I GOT SOMETHING RIGHT!

57. anonymous

300z

58. Nnesha

$\huge\rm \frac{ 3 }{ 4z } -\frac{ 1 }{4z+1 }$ $\frac{ ? }{ 16z^2 +4z }$ 16z^2 +4z is a denominator now at the numerator multiply first numerator of first fraction by the denominator of 2nd fraction and *multiply numerator of 2nd fraction by the denominator of first fraction

59. Nnesha

60. anonymous

16z*16z=256z+4z=300Z

61. Nnesha

what how did you get two 16z's ?

62. anonymous

cuz 16z to the power of two

63. Nnesha

now only z is to the 2 power not 16

64. Nnesha

16z^2 +4z is right leave it as it is

65. anonymous

ok

66. Nnesha

|dw:1437581002932:dw| now multiply numerator of first fraction by the denominator of 2nd fraction and multiply numerator of 2nd fraction by the denominator of 1st fraction it's like cross multiplication but don't forget to carry down the negative sign

67. anonymous

1 Cancel 1 on both sides 34z−14z=24z 2 Simplify 34z to 3z4 3z4−14z=24z 3 Simplify 14z to z4 3z4−z4=24z 4 Simplify 24 to 12 3z4−z4=12z 5 Simplify 12z to z2 3z4−z4=z2 6 Simplify 3z4−z4 to z2 z2=z2 7 Since both sides equal, there are infinitely many solutions Infinitely Many Solutions

68. anonymous

is that right?

69. Nnesha

i don't understand first sentence which 2 1's cancels out ?

70. anonymous

the one from 4z +1

71. Nnesha

nope you are not allowed to cancel out 1 of 4z+1

72. anonymous

ok

73. anonymous

instead can you help with this one

74. anonymous

The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below: Step 1: 2(3x − 4) = 8 + 2x + 4 Step 2: 5x − 6 = 12 + 2x Step 3: 5x − 2x = 12 + 6 Step 4: 3x = 18 Step 5: x = 6 In which step did the student first make an error and what is the correct step? Step 2; 6x − 6 = 2(6 + x + 2) Step 2; 6x − 8 = 12 + 2x Step 3; 5x − 2x = 12 − 6 Step 3; 5x + 2x = 12 + 6

75. anonymous

i think step 2

76. anonymous

what do you think

77. Nnesha

if you don't know how to solve previous one you will not understand da next one

78. Nnesha

why do you think its step 2 ?

79. anonymous

cuz there sould not be a five cuz of distributive propoerty

80. Nnesha

yep right

81. anonymous

82. anonymous

solve it tell me what you think ill tell you what i think: Two lines, C and D, are represented by the equations given below: Line C: y = x + 14 Line D: y = 3x + 2 Which of the following shows the solution to the system of equations and explains why? (6, 20), because both lines pass through this point (6, 20), because the point does not lie on any axis (3, 11), because one of the lines passes through this point (3, 11), because the point lies between the two axes

83. anonymous

i think it is b and you???

84. anonymous

@ash2326 @AliceCullen @acxbox22 @AaronAndyson @Albany_Goon @automaticloveletter

85. anonymous

Two lines, C and D, are represented by the equations given below: Line C: y = x + 14 Line D: y = 3x + 2 Which of the following shows the solution to the system of equations and explains why? (6, 20), because both lines pass through this point (6, 20), because the point does not lie on any axis (3, 11), because one of the lines passes through this point (3, 11), because the point lies between the two axes solve it tell me which one you think

86. Nnesha

why do you think its b?

87. anonymous

@SolomonZelman @Smita12 @sweetburger

88. anonymous

@paki

89. anonymous

@poopsiedoodle @TwiztTiez

90. anonymous

91. anonymous

@jillina29

92. anonymous

help!

93. Nnesha

94. Nnesha

95. anonymous

Two lines, C and D, are represented by the equations given below: Line C: y = x + 14 Line D: y = 3x + 2 Which of the following shows the solution to the system of equations and explains why? (6, 20), because both lines pass through this point (6, 20), because the point does not lie on any axis (3, 11), because one of the lines passes through this point (3, 11), because the point lies between the two axes tell me what you think

96. Nnesha

Why do you think its b ? what is solution ? how do you find solution on the graph ?

97. anonymous

i dont know thats why i want you to see if it correct i did it in my head

98. Nnesha

so stop guessing

99. Nnesha

solution is a point where both lines intersect

100. anonymous

if your not going to help me you can leave i want to know how to solve it

101. Nnesha

so what's the point of asking question

102. Nnesha

103. anonymous

to get someone to help me not yell at me or be rude

104. Nnesha

i'm not yelling at you

105. Nnesha

106. anonymous

@automaticloveletter can you help

107. anonymous

Two lines, C and D, are represented by the equations given below: Line C: y = x + 14 Line D: y = 3x + 2 Which of the following shows the solution to the system of equations and explains why? (6, 20), because both lines pass through this point (6, 20), because the point does not lie on any axis (3, 11), because one of the lines passes through this point (3, 11), because the point lies between the two axes

108. automaticloveletter

Both equations equal y so this means we can combine them together. Line C: y = x + 14 Line D: y = 3x + 2 Will become: x+14 = 3x+2 Then you'd subtract both sides by 3x: (x+14−3x=3x+2−3x−2x+14=2) Next subtract by 14 on both sides: (−2x+14−14=2−14−2x=−12) After that you'd divide both sides by -2: −2x/−2=−12/−2 x = 6 So now we have x all you have to do now is calculate for y and to do that put the value of x (6) in the equations: y = 6 + 14 (20) y = 3*6 + 2 (20) y = 20 The solution is (6,20) Your answer would be A.

109. anonymous

110. automaticloveletter

It's pretty simple but I hope I helped.

111. anonymous

very much

112. anonymous

will you keep helping

113. automaticloveletter

Depends. I just finished this material yesterday so yeah.

114. anonymous

oh you did you in 7 grade

115. automaticloveletter

8th

116. automaticloveletter

Well 9th but whatever, just tag me in your questions and I'll try to help.

117. anonymous

Peter is 2 years older than Winnie. Peter's age is 16 years less than seven times Winnie's age. The equations below model the relationship between Peter's age (p) and Winnie's age (w): p = w + 2 p = 7w − 16 Which is a possible correct method to find Peter's and Winnie's ages? Solve w + 2 = 7w − 16 to find the value of w. Solve p + 2 = 7p − 16 to find the value of p. Write the points where the graphs of the equations intersect the x axis. Write the points where the graphs of the equations intersect the y axis.

118. anonymous

@automaticloveletter

119. anonymous

lolz

120. anonymous

@automaticloveletter

121. anonymous

you stil;l there?

122. automaticloveletter

I think it's A

123. anonymous

ok

124. anonymous

but why

125. anonymous

A pair of equations is shown below: y = 7x − 8 y = 5x − 2 Part A: Explain how you will solve the pair of equations by substitution or elimination. Show all the steps and write the solution. Part B: If the two equations are graphed, at what point will the lines representing the two equations intersect? Explain your answer

126. automaticloveletter

Peter is 2 years older than Winnie. p = w + 2 Peter's age is 16 years less than seven times Winnie's age. 7w − 16 C and D don't make sense to me so your best choices would be A or B but I'd go with A.

127. anonymous

thats the next one

128. automaticloveletter

Alright so basically what it's asking you is: Solve. Show Your Work. Answer. Since both equations equal y we can combine them (like I did before, remember?)

129. anonymous

yeah i do cause you explained it clear #thebest

130. anonymous

wait can you show me how to do either subtitution or elimination

131. automaticloveletter

Alright, so now combine them for me.

132. anonymous

y=12x-10

133. automaticloveletter

No don't add them just put them together

134. anonymous

oh

135. anonymous

7x-8=5x-2

136. anonymous

correct?

137. automaticloveletter

It's easy all you do is look at both of them y = 7x − 8 y = 5x − 2 Take both y's out = 7x − 8 = 5x − 2 And take the first = sign out 7x − 8 = 5x − 2

138. automaticloveletter

Good job.

139. anonymous

ok was that elimination or substitutuion or None.

140. automaticloveletter

Now we have to subtract 5x from both sides. 7x−8−5x 5x−2−5x = 2x−8=−2

141. anonymous

2x-8=-2

142. anonymous

oh wait you said that lol

143. automaticloveletter

I think it's substitution

144. anonymous

k

145. anonymous

so can you wrap it all up so i can read it together

146. automaticloveletter

Next step is to add 8 to both sides 2x−8+8 −2+8 2x=6 After that just divide both by 2 2x/2 6/2 x = 3 Now we got 3 for x so all we have to do is put 3 into the equations to solve for y.

147. automaticloveletter

Can you do that? Or do you want me to show you that step as well?

148. anonymous

ok

149. anonymous

ok you know what my sis will help me wit this it too hard and we like not in person so her do this one:\\ Two equations are given below: a − 3b = 4 a = b − 2 What is the solution to the set of equations in the form (a, b)? (−2, −2) (−3, −1) (−9, −7) (−5, −3)

150. automaticloveletter

I'll just do it for you y = 7*3 − 8 (13) y = 5*3 − 2 (13) y = 13 Solution is (3,13) so this is where they would intersect on a graph.

151. anonymous

ok thanks

152. automaticloveletter

You're welcome. I have to do my own homework now so good luck.

153. anonymous

wait how did you get 3

154. anonymous

@automaticloveletter how did you get three

155. anonymous

nm