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3 years ago

21X 33 check answers with reminders

Mathematics

1 answer:

rosijanka [135]3 years ago

8 0

Answer: 693

it is 693 because...

I couldn't really explain with words so I gave you a step by step of my work.

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YOU HAVE BEN CHANGING DIESEL DISPENSERS FOR 35 MINS. YOU HAVE 5 SHOWERS THAT NEED TO BE CLEANED. HOW MANY MINUTES SHOULD IT TAKE

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Each would take 7 minutes

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3 years ago

Read 2 more answers

3.) Simplify the expression by combining like

Evgesh-ka [11]

$45s^2-19-s^2+16\\=45s^2-s^2-19+16\\=s^2(45-1)-19+16\\=44s^2+(-19+16)\\=44s^2-3$

Hope that helps and hope you get better!

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2 years ago

In a certain test, the number of successful candidates was three times than that of unsuccessful candidate, if there had been 16

Natali5045456 [20]

Answer:

The number of candidates is 136.

Step-by-step explanation:

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3 years ago

A: What are the solutions to the quadratic equation x2+9=0? B: What is the factored form of the quadratic expression x2+9? Selec

Paraphin [41]

Answer:

A. The solutions are $x=3i,\:x=-3i$ .

B. The factored form of the quadratic expression $x^2+9=(x-3i)(x+3i)$

Step-by-step explanation:

A. To find the solutions to the quadratic equation $x^2+9=0$ you must:

$\mathrm{Subtract\:}9\mathrm{\:from\:both\:sides}\\\\x^2+9-9=0-9\\\\\mathrm{Simplify}\\\\x^2=-9\\\\\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}\\\\x=\sqrt{-9},\:x=-\sqrt{-9}$

$x=\sqrt{-9} = \sqrt{-1}\sqrt{9}=\sqrt{9}i=3i\\\\x=-\sqrt{-9}=-\sqrt{-1}\sqrt{9}=-\sqrt{9}i=-3i$

The solutions are:

$x=3i,\:x=-3i$

B. Two expressions are equivalent to each other if they represent the same value no matter which values we choose for the variables.

To factor $x^2+9$ :

First, multiply the constant in the polynomial by $i^2$ where $i^2$ is equal to -1.

$x^2+9i^2$

Since both terms are perfect squares, factor using the difference of squares formula

$a^2-i^2=(a+i)(a-i)$

$x^2+9=x^2+9i^2=\left(-3i+x\right)\left(3i+x\right)$

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3 years ago

If i started at 11:40 A.M. And my elapsed time was 5 hours and 20 minutes. What is my end time?

kiruha [24]

Answer:

5:00 pm

Step-by-step explanation:

11:00 + 5 is 4.00 so you'd be a 4:40 + 20 minutes, that ranks up another hour so its at 5:00 pm

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3 years ago