1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andre45 [30]
3 years ago
12

12. Which equation is an identity?

Mathematics
2 answers:
masya89 [10]3 years ago
6 0
12) the answer is A
11 -2v-3=-2-8
8=8

13) the answer is A
because 3 are not equal to -5

or

5v+3=5v-5
5v-5v=-5-3
0=-8 (false)
kupik [55]3 years ago
4 0

Answer:

12. Answer is B

13.Answer is A

step-by-step explanation:

12. A .11 -(2v +3)= -2v -8

11-2v +3= -2v-8

-2v +2v= -11-3-8

0=-22

<u>this equation has no identity</u>

B. 5w+8-x=6w-2(w-4)

5w-6w+2w=x-8+8

w=x

<u>this equation has an identity</u>

C. 7m-2=8m+4-m

7m=6+7m

0=6

<u>this equation has no identity</u>

D. 8y +9=8y-3

8y-8y=-3-9

0=-12

<u>this equation has no identity</u>

13. A. 5v+3 =5v -5

5v-5v=-5-3

0= -8

<u>this equation has no solution </u>

B. 2x -4=2x+7-x

2x -x=7+4

x=11

<u>this equation has a solution </u>

C. 2y + 5-y=2y-3(y-6)

2y+5-y=2y-3y+18

y+5=-y+18

2y= 13

y=13/2

<u>this equation has a solution</u>

D. 7z +9= -7z-6

14z=-6-9

14z= -15

z=-15/14

<u>this equation has a solution</u>

You might be interested in
-63<br> —— = -7 what’s the error <br> -9
STatiana [176]

Answer:

One of the negatives must go

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Answers for the 2 boxes please :)​
Lapatulllka [165]

Answer:

-2,3

Step-by-step explanation:

x = -2

y = 3

..........

8 0
3 years ago
30 POINTS HELP ME-
Ray Of Light [21]

Answer:

Number line graph with closed circle on 30 and shading to the right

because you already have 30 dollars and they need at least 120 but if they get more then 120 they can still hold the science fair.

THIS ANSWER ISN'T MINE. I TOOK IT FROM AN ANSWER TO THE SAME QUESTION ANOTHER USER POSTED.

4 0
3 years ago
Read 2 more answers
Multiply and simplify. (x - 1)(x - 1)(x - 1)
Tanzania [10]
(sorry if it's too late and you've already figured it out, but here you go anyway)
The easiest way to do this is to start by FOILing then add.
So just start with (x-1)(x-1)
(x-1)(x-1)
Front: (x*x) = x^2
Outer: (x*-1) = -x
inner: (-1*x) = -x
Last: (-1*-1) = 1
Added: x^2 -2x +1
Now take that answer and do the same thing with (x-1). It's basically the same thing, just with an added thing you need to multiply.
(x-1)(x^2-2x+1)
(x*x^2) = x^3
(x*2x) = 2x^2
(x*1) = x
(-1*x^2) = -x^2
(-1*-2x) = 2x
(-1*1) = -1
Now add everything together:
x^3+2x^2+x-x^2+2x-1
The answer is:
x^3+x^2+3x-1
3 0
3 years ago
Evaluate (x)=3+1=3x+ 1over the domain {1,2,3,4,} . What is the range of<br> (x)
katrin [286]

Answer: Step-by-step explanation:

Step-by-step explanation:

The range of a function is the set of images associated with a given domains. As domain is a discrete set, the range can be determined by evaluating the function at each element in domain:

x = 0

x = 1

x = 2

x = 3

The range of r(x) is .

8 0
3 years ago
Other questions:
  • Help with math plz help
    8·1 answer
  • When in europe, you are told that you are eating a steak weighing 140 grams. this is equivalent to how many ounces?
    10·1 answer
  • To which subsets of the real numbers do the number 1.68 belong to
    15·1 answer
  • Помогите с МАТЕМАТИКОЙ пожалуйста!
    10·1 answer
  • Diego has 4 times as many autographed baseballs as Melanie has. Diego has 24 autographed baseballs. How many autographed basebal
    14·2 answers
  • Can someone help me really please
    12·1 answer
  • Under what circumstances will the chi-square test for goodness of fit produce a large value for chi-square?
    8·1 answer
  • Write a simplified expression that represents the perimeter of an irregular quadrilateral with side lengths (2 1/4t−5), (4t+3),
    8·1 answer
  • Name the part of the given expression that is asked. What is "20" in the expression: 7x - 15y + 20
    12·1 answer
  • Which best describes the range of the function f(x) = 2(3)^x?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!