3 years ago

Jerry started playing video gamrs at 3:20. If he took a break at 7:15 how long had he been playing

Mathematics

1 answer:

Law Incorporation [45]3 years ago

5 0

4(60)-5 = 235 minutes or 3 hours 55 minutes

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PlzplPzlpzlzpzl .......i beg u do this easy question for me ....

jeka94

Answer: $-p^2-(q+r)^2$

Work Shown:

I'm assuming your teacher wants you to factor as much as possible.

$-p^2-q^2-r^2-2qr\\\\-p^2-q^2-2qr-r^2\\\\-p^2-(q^2+2qr+r^2)\\\\-p^2-(q+r)^2\\\\$

In the last step, I used the rule that $(a+b)^2 = a^2+2ab+b^2$

We cannot factor any further. If the first term was $p^2$ instead of $-p^2$ , then we could use the difference of squares factoring rule.

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I have 30 coins consisting of nickels, and quarters. The total value of the coins is $4.10. How many of each kind do I have?

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A=#nickels, b=#quarters

5a + 25b = 410 total value

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subtracting . . . 4b = 52

thus b = 13 and a = 17

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