Question

NO ONE IS HELPING TODAY LIKE I HAVE ASKED 50 TIMES AND GOT NOTHIN I NEED HELP

Answer 1

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. (5 points)

Part B: If the two equations are graphed, at what point will the lines representing the two equations intersect? Explain your answer. (5 points)

Answer 2

IT HAS TO B IN ELIMINATION OR SUBSTITION

Answer 3

srry caps was on

Answer 4

@Wolf_Girl2002

Answer 5

@MichelleiSMine

Answer 6

@curiositygirl

Answer 7

btw i provide medal

Answer 8

@jabez177

Answer 9

i did this last year so hold on while I try to refresh my memory on it

Answer 10

WOW I CAN TRY AND DO MY BEST BUT IT IS A BIT 2 HARD

Answer 11

ok thx guyz u da best

Answer 12

and sadly this type of equation was my fav and i just forgot how to do it XD

Answer 13

YEAH WHAT SHE SAID
SORRY

Answer 14

awe man...XD well i need it really bad i horible at math like really bad

Answer 15

@austin11111 CAN U HELP

Answer 16

@ashhhrodriguez CAN U HELP PLZ

Answer 17

thx...@austin11111

Answer 18

@austin11111

Answer 19

@iambatman @mathmath333 CAN U HELP

Answer 20

i may be able to help

Answer 21

thx u so much

Answer 22

but it has to b in elimination or substitution

Answer 23

Sure, I can help you

Answer 24

yay thx u guyz

Answer 25

um sorry guys im not the best in mathematics

Answer 26

o ok np

Answer 27

Alright what method do you want to use?

Answer 28

Substitution or elimination?

Answer 29

substitution

Answer 30

THNX BAT 4 HELPING HIM

Answer 31

The idea for substitution is, you take one equation, isolate one of the variables, then plug it into the other equation, so for example:

You have,
y = 7x − 8
y = 5x − 2

Well, they already made it simple for you, as they gave you solved variables (for y).

Now let y = y
\[5x-2=7x-8\] solve for x here.

Once you get x, that will be one point to a solution, the next step is to solve for y, this is even easier because you take your x value and plug it in for either of the equations, take the first one or the second one.

Answer 32

are u asking me to take the first one or the second one i would pic the first

Answer 33

Well first solve for x, then plug it in either of the equations to get a corresponding y, it doesn't matter which one you pick.

Answer 34

When you get the (x,y) that will be the point where the lines intersect.

Answer 35

i usually went for the one I thought was easier

Answer 36

so what is the value of x im sorry im really not good with math

Answer 37

Ok so you have two equations right?

Answer 38

yea

Answer 39

set y = y
5x-2=7x-8 and solve for x.

Answer 40

so it would be 3x and 1x or idk

Answer 41

How did you get that? I see there is a problem you're having with algebra.

Answer 42

i subtracted each side and yea i am havin a problem with it it was never my strong subject

Answer 43

did you subtract the -2 from the -8?

Answer 44

no 2 from the 5 and 7 from the 8 they not negative the subtracting

Answer 45

Generally when you have an equation,

what you want to do is, isolate a variable meaning you want that variable on its own, and what you do to the left side you must also do to the right, so for example lets take:

x+3=3x-3

and I ask you to solve for x.

So lets move all the constants on one side and the variables on the other, so I'm going to move the x's to the left and the 3's to the right in doing so I use simple operations that we all know, add, subtract, multiply, divide.

Lets first move the x's:

x-3x+3=3x-3-3x you see the 3x on the right side gets cancelled out so it balances the left.

So now we have x-3x+3 = -3
Let's now move the 3 to right side.

What's the opposite operation of adding? Subtracting right.

x-3x+3-3=-3-3
x-3x=-6

We're almost done, so now we have:

-4x=-6, ok so the -4 is "stuck" onto the x, meaning it's multiplied, what's the opposite of multiplying? Dividing.

Divide -4 on both sides,

x=-6/-4 = 6/4 = 3/2

Answer 46

Now use this and try to solve for x :)

Answer 47

ohhh thats what you did. your supposed to try to get the variable on one side. try adding the -2 and the -8 to get the 5x by itself
thats what i was taught last year

Answer 48

Sorry for using so many 3's in my example haha...it's early >.<

Answer 49

ikr!

Answer 50

np...thx i think i get it

Answer 51

I will be back much later, I have to go to class now, take care and good luck and I see you're good hands with curiositygirl.

That's great @srgntb0$$ :)

Answer 52

can u stay here so i can do the problem and c if i get it right

Answer 53

I would love to srgnt, but work on it, and I will check in with you later, I'm getting late, so I'll catch you later!

Answer 54

o ok cya

Answer 55

have fun in class iambatman

Answer 56

r u stayin

Answer 57

I GUES BATMAN IS FRIENDLY XD

Answer 58

yeah

Answer 59

OMG I CANT DO IT I DONT UNDERSTAND IT ON MY PROBLEM

Answer 60

okay hold on. there is like nothing to freak out about trust me. when i first learned how to do it i was in the same boat as you

Answer 61

ok

Answer 62

it fine i just gona try to get everything else right on it and if i get this wrong ill at least get an 80%...what school u in i in flvs

Answer 63

im in flvs also.
and what I did so far is set it up like iambatman said to do
5x-2=7x-8
I then added the -2 to the -8 and got -6

Answer 64

where did u get the negative 8 and 2 they were subtracting from the 5x and 7x...srry it takin so long i suck at math

Answer 65

well since the equation is
y=7x-8
y=5x-2
for substitution you set it up like this> 5x-2=7x-8

Answer 66

and since you need to get the x by itself you want to make either 5x be by itself or 7x

Answer 67

ok but idk how to find the answer and if u explain it i wont understand i didnt understand imbatman's

Answer 68

u in 8th arent u i in 7th

Answer 69

lol its okay i am actually trying to make it as simple as i had
actually im in 9th

Answer 70

o cool...if i get the 80% at least i have a b that all i need to pass but i still need something resonable to put on the written part

Answer 71

yeah
thatll be good
do you want me to give you part of the written part?

Answer 72

sure...also i need the answer to another question

Answer 73

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

Answer 74

Wilson is 6 years older than Mary. Wilson's age is 10 years less than five times Mary's age. The equations below model the relationship between Wilson's age (w) and Mary's age (m):

w = m + 6
w = 5m − 10

Which is a possible correct method to find Wilson's and Mary's ages?

Solve w + 6 = 5w − 10 to find the value of w.

Write the points where the graphs of the equations intersect the x axis.

Solve m + 6 = 5m − 10 to find the value of m.

Write the points where the graphs of the equations intersect the y axis.

Answer 75

The work of a student to solve the equation 3(2x − 4) = 8 + 2x + 6 is shown below:

Step 1: 3(2x − 4) = 8 + 2x + 6
Step 2: 5x − 7 = 14 + 2x
Step 3: 5x − 2x = 14 + 7
Step 4: 3x = 21
Step 5: x = 7

In which step did the student first make an error and what is the correct step?

Step 2; 6x − 12 = 14 + 2x

Step 2; 6x − 7 = 2(6 + x + 4)

Step 3; 5x − 2x = 14 − 7

Step 3; 5x + 2x = 14 + 7

Answer 76

@curiositygirl i thought u were gona help me

Answer 77

okay
For substitution you want to get the x by itself. so you set up the equation by eliminating y. you are then left with 5x-2=7x-8. to get the x by itself you want to move the -2 over and combine it with the -8. this becomes 5x=7x-6 after adding the -2 with the -8
sorry if its confusing

Answer 78

so is that the answer srry kinda confusing...and what about the others and y dont u have a profile pic

Answer 79

thats part of Part A because idk how to explain the rest
i never thought of having one yet

Answer 80

hold on about the others i am trying to figure them out

Answer 81

ok thx u y dont u got a profile pic

Answer 82

welcome
idk

Answer 83

plz help

Answer 84

hay i think y=13 and x=3 is that right

Answer 85

idk what

Answer 86

about the other questions what are they

Answer 87

@sashadqaf can u plz help me

Answer 88

id help but im really really really bad at math :c sowy

Answer 89

@KamiBug plz help

Answer 90

can u help

Answer 91

Which question is it?

Answer 92

the last 4 i asked

Answer 93

Okay, give me sec. :)

Answer 94

ok i go to thesame school as u flvs

Answer 95

@philcua can u help

Answer 96

i need a lot