Mathematics, 24.09.2021 02:20 izzyisawesome5232

Can someone help? i have a test tomorrow and im really confused with this

Answers: 2

Show answers

Answers

Answer from: asdf334asdf334

45°

Step-by-step explanation:

The Supplementary Angles Postulate states that if two angles form a linear pair, then the sum of the angles is 180°.

With this knowledge, you can set up your equation:

(3x+6)+(x+2)=180

(It's okay that I didn't put the degrees in, you still get the same answer)

First, combine like terms.

(3x+6)+(x+2)=180

4x+6+2=180

4x+8=180

Then solve.

4x+8=180

-8 -8

4x=172

÷4 ÷4

x=43

DO NOT STOP HERE It is a common mistake (I have fallen for it many times before!!)

Plug in the "x" into the equation.

(43)+2=45°

Hope this helps! If you need more clarification, or if it isn't right, feel free to tell me in the comments. Rock that quiz tomorrow!!

Answer from: blackkiki5588

(3x+6) +(x+2)=180 Reason:angles on a straight line =180(degrees)

3x+6+x+2=180
(what I did in this strep was to remove the brackets so I times sign(+) into the bracket. So if it was a minus,then (3x+6)-(x+2)=180 so when I remove the brackets to get a normal equation then it will be written like 3x+6-x-6=180. You multiply the negative into the brackets. So remember +x+=+ (gives you a positive) and -x-=+ and a -x+=- (the x is times, a multiplication sign) remember that rule for multiplying signs)

3x+6+x+2=180
3x+x+6+2=180
4x+8=180
4x+8-8=180-8 (8-8=0 so they cancel each other out ,take the positive 8 to the other side since we want x to be alone, when you take the 8 to the other side of the equal sign, it becomes a negative 8, the sign has to change when taken to the other side of the equal side

4x=180-8
4x=172
x=43
(What I did is divide 4x by 4 and 172 divided by 4, the reason I did this was because I wanted x on its own. And when you divide you need to divide on both sides)

So after this your substitute the answer we got for x into x. 3(43)+6+43+2=180
135+45=180(degrees)

Hope this makes sense. I explained everything in detail so you can use it for other equations similar to this.

Please mark as brainliest(crown) above my comment

Answer from: Quest

3cm and 6 and 9 cm that a possibility of that question
Which are the possible side lengths of a triangle?

Answer from: Quest

step-by-step explanation:

Another question on Mathematics

Mathematics, 21.06.2019 18:30

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Answers: 1

Answer

Mathematics, 21.06.2019 23:10

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?

Answers: 2

Answer

Mathematics, 21.06.2019 23:30

Which of the following vectors are orthogonal to (2,1)? check all that apply

Answers: 1

Answer

Mathematics, 22.06.2019 00:30

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.

Answers: 1

Answer

You know the right answer?

Can someone help? i have a test tomorrow and im really confused with this
...

Questions