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Shkiper50 [21]
2 years ago
12

Subtract -2x^2-6x from -2x^2+9

Mathematics
1 answer:
Misha Larkins [42]2 years ago
3 0

Answer:

6x + 9

Step-by-step explanation:

- 2x² + 9 - (- 2x² - 6x) ← distribute parenthesis by - 1

= - 2x² + 9 + 2x² + 6x ← collect like terms

= 6x + 9

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Step-by-step explanation:

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Mark charged a battery. Each minute, the percentage of the battery's capacity that was charged increased by 2.5 percent After 17
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The battery was 19 percent when the charging began.

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3 0
3 years ago
5.1% < 0.51 please help been working on this all day I really need help
WITCHER [35]
You can write any decimal as a precent by moving the decimal 2 places to the right so 
0.51 = 51%
5.1% < 51%
5.1% < 0.51

or, any precent can be written as a decimal by moving the decimal points two point to the left so
5.1% = 0.051
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5.1% < 0.51

7 0
3 years ago
Help on this problem pls<br> Thanx
maw [93]

5/7 +1/3

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common denominator is 21

mutiply by 3 for 5/7

(5)(3)/(7/(3)= 15/21

mutiply by 7 for 1/3

(1)(7)/(3)(7)= 7/21

15/21+7/21

add the numerators

15+7= 22

denominator stays the same -21

Answer:

22/21 or 1 1/21

3 0
3 years ago
Joey bought 10 cupcakes and has four friends. He wants to have nothing left, but he wants everyone including him to have the sam
Roman55 [17]

we use divsion, 10 divided by 5 is 2, everyone get 2 yumy cupcakes.

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