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xenn [34]
3 years ago
8

Simplify the following. (x²+2x)-(x²-7x)​

Mathematics
2 answers:
insens350 [35]3 years ago
8 0

Answer:

9x

Step-by-step explanation:

(x² + 2x) - (x² - 7x) ← distribute parenthesis

= x² + 2x - x² + 7x ← collect like terms

= 9x

Reil [10]3 years ago
3 0

Answer:

9x

Step-by-step explanation:

( x ² + 2 x ) - ( x² - 7 x )

Simply the expression

  • ➻ ( x ² + 2 x ) - ( x² - 7 x )

Remove unnecessary parantheses

  • ➻ x² + 2x - x² + 7x

combine like terms

  • ➻ x² - x² + 2x + 7x
  • ➻ 9x
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What is the percent of change from 6,000 to 60?
Thepotemich [5.8K]

Answer: 99% decrease

Step-by-step explanation: Since the number changes from 6,000 to 60, we know that it's decreasing. Now to find the percent decrease, we divide the amount of change by the original number.

The amount of change is the difference between 6,000 and 60 and the original number is 6,000.

6,000 - 60 is 5,940 so we are left with \frac{5,940}{6,000} and dividing 6,000 into 5,940 gives us 0<em>.</em>99.

Finally, since the problem is asking us for the <em>percent</em>, we write 0.999 as a percent by moving the decimal point 2 places to the right to get 99%.

So when a number changes from 6,000 to 60, it has decreased by 99%.

6 0
3 years ago
Evaluate the expression x2 + y2 if x = -3 and y= -2
Ilya [14]

Answer:

<h2>The answer is 13</h2>

Step-by-step explanation:

x² + y²

x = - 3 , y = - 2

Substitute the values of x and y into the above expression and solve

That's

( - 3)² + (-2)²

= 9 + 4

We have the final answer as

<h3>13</h3>

Hope this helps you

5 0
3 years ago
Help me please if you 100% know it:)
vichka [17]
The answer is 4 because 2 studied for 4 hours and 1 studied for 5 hours and 1 studied for 8 hours. the number of students that studied AT LEAST 4 hours, so this would be described by the inequality x>=4
4 0
3 years ago
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Who do I write 42\96.6 as a unit rate
Savatey [412]

Answer:

0.43

Step-by-step explanation:

because you have to divide the top and bottom by the denominator

3 0
3 years ago
What is 25 1/2 in radical form
Natalija [7]
I hope this helps you




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50+1/2


51/2


25.5
3 0
4 years ago
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