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Kryger [21]
3 years ago
8

I need help solving.... 9x-2x+3=3x+4x+3

Mathematics
1 answer:
Anarel [89]3 years ago
4 0
9x - 2x + 3 = 3x + 4x + 3
Subtract 3 from both sides:
9x - 2x + 3 - 3 = 3x + 4x + 3 - 3 
Which then:
= 9x - 2x = 3x + 4x
Add similar elements: 9x - 2x = 7x
7x = 3x + 4x
Add similar elements: 3x + 4x = 7x
7x = 7x
The, subtract 7x from both sides
7x - 7x = 7x - 7x 
Simplify,
0 = 0
So, both sides are equal.
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can someone help me understand this, please? For some reason my answer is correct but I need to understand how did I found the c
Morgarella [4.7K]

Answer with step-by-step explanation:

The way the question is worded, this actually shouldn't be correct. The correct answer should be 3:4.

Because the trapezoids are similar, we can find the ratio of their perimeters by actually just finding the ratio of their sides.

Why?

By definition, the corresponding sides of a polygon are in a constant proportion. The perimeter is simply the sum of all sides of the polygon. Since we're just adding the sides, the proportion will still be maintained.

Therefore, we'll just need to ratio of their corresponding sides. The only two corresponding sides that are marked are \overline{RS} and \overline{AB}.

The ratio of \overline{RS}:\overline{AB} is 18:24\implies \boxed{3:4}.

The reason why it ideally should be 3:4 and not 4:3 is because the question states RTSU\sim ABCD, which mentions RSTU first, so our answer should follow this respective order. I believe you were marked right anyways because the specific order is not specified, but generally, you want to give your answer respectively by default.

3 0
2 years ago
Tinas rent will increase from $595 this year to $708 next year what is the percent change to the nearest percent
snow_lady [41]

Answer:

The answer rounded to the nearest percent is 19%.

Step-by-step explanation:

The formula for percent change is this:

((y2 - y1) / y1)*100

Let y1 be the first value (595) and let y2 be the second (708).

((702 - 595) / 595)*100

702 - 595 is 107 and 107/595 is approximately 0.188, multiplied by 100 is 18.8, which is rounded to 19%.

That is our solution.

<em>And that's an awfully small amount of rent to pay (at least in California).</em>

4 0
3 years ago
Read 2 more answers
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djverab [1.8K]

Answer:

34 dollars

Step-by-step explanation

It is 34 because if you look at the question, you can determine that it is asking for addition. 25+9 =34

7 0
2 years ago
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1. Mrs. Verner's class has
weqwewe [10]

Answer:

60%

Step-by-step explanation:

6 is 40% of 15, therefore meaning the remaining 60% of her class are boys

6 0
2 years ago
Write each fraction as a decimal 8/1000
nexus9112 [7]

Answer:

0.008.

Step-by-step explanation:

8 / 1000

= 0.008.

The 3rd position after the decimal point is the thousandth's.

6 0
2 years ago
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