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kirill115 [55]
2 years ago
10

Need help please can you give answer with working out i can not answer as it is quite gard

Mathematics
1 answer:
Elis [28]2 years ago
4 0

Step-by-step explanation:

\text{Given:}\\\\AB=3x-4\\AC=2x+12\\BC=7x-2\\AB:AC=1:2\Rightarrow(3x-4):(2x+12)=1:2\\\\\dfrac{3x-4}{2x+12}=\dfrac{1}{2}\qquad\text{cross multiply}\\\\(3x-4)(2)=(2x+12)(1)\qquad\text{use the distributive property}\\\\(3x)(2)+(-4)(2)=2x+12\\\\6x-8=2x+12\qquad\text{add 8 to both sides}\\\\6x-8+8=2x+12+8\\\\6x=2x+20\qquad\text{subtract}\ 2x\ \text{from both sides}\\\\6x-2x=2x-2x+20\\\\4x=20\qquad\text{divide both sides by 4}\\\\\dfrac{4x}{4}=\dfrac{20}{4}\\\\x=5

\text{Put the value of}\ x\ \text{to}\ AC\ \text{and}\ BC:\\\\AC=2(5)+12=10+12=22\\\\BC=7(5)-2=35-2=33\\\\AC:BC=22:33=\dfrac{22}{33}=\dfrac{22:11}{33:11}=\dfrac{2}{3}=2:3

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What's 84 divided by 7 show the work plz
Snowcat [4.5K]
Ok, this is what you do, 

      
7(^^^^^
      84
7 goes into 8 1 time so it would be this

      1
7(^^^^
      84
     - 7

and it leaves you with 14
   
    
     1
7(^^^^
       14
then how many time does 7 go into 14? 2 times

so it would be


      12
7(^^^^
       14
       -14
AND YOUR ANSWER IS 12.



7 0
3 years ago
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How do I solve this step by step?
Zinaida [17]

Answer:

45

Step-by-step explanation:

plug in 3 where the xs are

2(3)(6(3)-5(3))+(3)^2(5(3)-4(3)=45

2(3)=6

6(3)=18

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(3)^2=9

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8 0
3 years ago
Can you help me answer this? please​
Leya [2.2K]

Answer: 1859.5 mini bears

Step-by-step explanation:

From the information given in the question,

10 mini bars = 12.1 grams

10 regular bars = 23.1 gram

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To eat enough mini bears to match the super bears, the number that it'll take will be:

Since 10 mini bars = 12.1 grams

1 mini bear = 12.1 grams / 10 = 1.21 gram

Since 1 super bear = 2250 grams, the number of mini bears needed to equate this will be:

= 2250/1.21

= 1859.5 mini bears

5 0
2 years ago
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frozen [14]

Answer:

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Step-by-step explanation:

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2 years ago
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Write your answer as a fraction or as a whole mixed number. 2 5/11 - 10 7/11
kaheart [24]

Answer:

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Step-by-step explanation:

convert each mixed number into a improper fraction

27/11  - 117/11

= -90/11

3 0
3 years ago
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