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3 years ago

I really need help ;-;) pls explain this

Mathematics

1 answer:

pav-90 [236]3 years ago

8 0

Answer: A: 180= 90+4x+x

B: x=18

Step-by-step explanation:

1. Every triangle has a length of 180

2. So all the measurements combined would equal 180

3. So write the equation 180=90+4x+x

4. Let‘s simplfy, 180=90+5x

5. Subtract 90 from each side, 90=5x

6. Divide each side by 5, 18=x.

7. Double check our work! 90+(4*15)+18=180

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Step 2: Removing parenthesis

Step 3: Grouping like terms

Step 4: Combing like terms

Step 5: Writing the final expression in standard form

Step-by-step explanation: First expression : $6x^3-2x + 3$

Second expression : $-3x^3+5x^2+4x-7$ .

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Step 1: Reverse the signs of $6x^3-2x + 3$ expression.

$(-3x^3+5x^2+4x-7)+(-6x3+2x-3)$

Step 2: Removing parenthesis

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Step 3: Grouping like terms

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Step 4: Combing like terms

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Step 5: Writing the final expression in standard form

$-9x^3 + 5x^2 + 6x-10$

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3 years ago

Read 2 more answers

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Answer:

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Step-by-step explanation:

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3 years ago

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2 years ago

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svp [43]

Answer:

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