Mathematics, 24.09.2021 02:20 izzyisawesome5232

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

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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

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation:

Answer from: Quest

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

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