Question

What is the value of z in the equation 2z + 6 = −4?

5
1
−1
−5

Answer 1

@TheSmartOne

Answer 2

Sorry, got distracted on another tab :P

So what did you get as the answer?

Answer 3

5?

Answer 4

@TheSmartOne

Answer 5

What did you get for -4 - 6 = ?

Answer 6

no i think i got the answer

Answer 7

5

Answer 8

or a

Answer 9

Yeah, that's wrong :P

-4-6 = -10

and then if you divide by 2, you get a negative answer, not a positive one

Answer 10

oh so its -5?

Answer 11

Yes

Answer 12

ok i have just a couple more

Answer 13

if that s ok?

Answer 14

The incorrect work of a student to solve an equation 2(y + 8) = 4y is shown below:

Step 1: 2(y + 8) = 4y
Step 2: 2y + 10 = 4y
Step 3: 2y = 10
Step 4: y = 5

Which of the following explains how to correct Step 2 and shows the correct value of y?

The equation should be y + 8 = 4y after division by 2; y = 4
The equation should be y + 8 = 4y after division by 2; y = 6
2 should be distributed as 2y + 16; y = 4
2 should be distributed as 2y + 16; y = 8

Answer 15

i got d

Answer 16

correct :)

Answer 17

ok

Answer 18

Which set of steps shows the solution to the equation 3y = −9?

y = −9 − 3; y = 6
y = −9 ÷ 3; y = −3
y = −9 ÷ (−3); y = 3
y = −9 − (−3); y = −6

Answer 19

b

Answer 20

correct :)

Answer 21

ok

Answer 22

A system of equations is shown below:

n = 3m + 7
n − 2m = 1

What is the solution, in the form (m, n), to the system of equations?

(3, 7)
(1, 8)
(−3, −2)
(−6, −11)

Answer 23

b

Answer 24

c

Answer 25

i mean

Answer 26

i mean C

Answer 27

That's wrong.

How do you want to solve it? Elimination or substitution?

Answer 28

ok

Answer 29

is it b?

Answer 30

Nope.

So which one will it be? Elimination or substitution?

Answer 31

elimination?

Answer 32

n = 3m + 7
n − 2m = 1

let's add 2m on both sides to the second equation

n = 3m + 7
n = 2m + 1

what do you get when you subtract the two equations?

Answer 33

A? right

Answer 34

??

Answer 35

you there i have to check this by 9

Answer 36

i hate bieng annoying

Answer 37

You're just guessing random answers now.

Answer 38

idk what it is but ive got to get this done before tonit because my dad wont sign me up for lacrosse if i dont he wont

Answer 39

That's alright, but the question won't take more than 2 minutes if you cooperate with me.

n = 3m + 7
n = 2m + 1

Subtract the two equations. If we do it right now, we'll be getting rid of n because n - n = 0. And we'll then be left with m and find the value of m.

so, let's subtract

n - n = 3m + 7 - (2m + 1)

simplify that :)

Answer 40

its D (-6,-11)

Answer 41

right i simplyfid i swear

Answer 42

Yup! Good job :)

Answer 43

ok

Answer 44

The equation 1.6x − 2.2 = 1.4x can be transformed to form which of the following expressions?

3.0x = 2.2
0.2x = −2.2
3.0x = −2.2
0.2x = 2.2

Answer 45

i got D

Answer 46

correct

Answer 47

ok

Answer 48

A system of two equations is shown below:

Equation C: a = 3b + 6
Equation D: a = 7b − 1

What value of a can be substituted into equation D to solve the system of equations?

3b
7b
3b + 6
7b − 1

Answer 49

C?

Answer 50

Correct! :)

Answer 51

ok

Answer 52

Which statement is true for the equation 3x − 3x − 2 = −2?

It has no solution.
It has one solution.
It has two solutions.
It has infinitely many solutions.

Answer 53

D?

Answer 54

?

Answer 55

Correct :)

Answer 56

yay

Answer 57

:D

Answer 58

The system of equations shown below is graphed on a coordinate grid:

4y + x = 4
2y − x = 8

Which statement is true about the coordinates of the point that is the solution to the system of equations?

It is (2, 5) and lies on both lines.
It is (−4, 2) and lies on both lines.
It is (2, 5) and does not lie on either line.
It is (−4, 2) and does not lie on either line.

Answer 59

A?

Answer 60

When you do elimination, you're solving for the variable y not x

so you get y = 2, not x = 2

so try again :)

Answer 61

B?

Answer 62

@TheSmartOne

Answer 63

correct :)

Answer 64

ok

Answer 65

Which statement is true for the equation 5n − 4 = 5n − 3?

It has infinitely many solutions.
It has two solutions.
It has one solution.
It has no solution.

Answer 66

D?

Answer 67

correct :)

Answer 68

Which statement is true about the solutions for the equation 4y + 6 = −2?

It has infinitely many solutions.
It has two solutions.
It has one solution.
It has no solution.

Answer 69

c?

Answer 70

bingo (:

Answer 71

yay

Answer 72

Which graph best represents the solution to the system of equations shown below?

y = -4x - 19
y = 2x − 1

A coordinate grid is shown from negative 10 to positive 10 on the x axis and also on the y axis. Two lines are shown intersecting on ordered pair 7, 3.
A coordinate grid is shown from negative 10 to positive 10 on the x axis and also on the y axis. Two lines are shown intersecting on ordered pair 3, 7.
A coordinate grid is shown from negative 10 to positive 10 on the x axis and also on the y axis. Two lines are shown intersecting on ordered pair negative 3, negative 7.
A coordinate grid is shown from negative 10 to positive 10 on the x axis and also on the y axis. Two lines are shown intersecting on ordered pair negative 7, negative 3.

Answer 73

D?

Answer 74

Nope, you have the x and y coordinates switched

Answer 75

A?

Answer 76

@TheSmartOne

Answer 77

nope

y = -4x - 19
y = 2x − 1

subtract both equations

y - y = -4x - 19 - (2x - 1)

simplify it :)

Answer 78

BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBbb

Answer 79

B

Answer 80

(;

Answer 81

right????

Answer 82

nope, and by process of elimination, you now know what the answer is

Answer 83

A pencil at a stationery store costs $1, and a pen costs $1.50. Stefan spent $7 at the store. He bought a total of 6 items. Which system of equations can be used to find the number of pencils (x) and pens (y) he bought?

x + 1.5y = 7
x + y = 6
1.5x + y = 7
x = 6y
x + 2y = 7
6x = 1.5y
2x + y = 7
6x = 1.5y

Answer 84

last one and A

Answer 85

correct :)

Answer 86

yay

Answer 87

thank you soooo much you helped sooo much

Answer 88

Anytime! :)