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3 years ago

14

Lila forgot the security code for her apartment building. The code is two different digits followed by a capital letter. How man

y different possible codes are there?

1 answer:

zavuch27 [327]3 years ago

4 0

10*9*26
Hope dis helps you :3

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What is equal to 275%

Alla [95]

As a decimal, you would have to divide 275 by 100

275/100 = 2.75

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3 years ago

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A submarine was at -50 meters below water. It dove down -8 meters per minute for 12

Hatshy [7]

The submarine would be 146

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3 years ago

Explain why you would make one of the addends a ten number when solving a addition problem

bija089 [108]

By using a tens number as you refer to a multiple of ten. As a multiple of ten you can just add it to another number easier than a ones number

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4 years ago

Identify the interval(s) on which the function y = 2x^2 - 8x - 10 is positive.

Serga [27]

Given:

$y=2x^2-8x-10$

To find:

The interval(s) on which the given function is positive.

Solution:

We have,

$y=2x^2-8x-10$

$y=2(x^2-4x-5)$

$y=2(x^2-5x+x-5)$

$y=2(x(x-5)+1(x-5))$

$y=2(x+1)(x-5)$

For zeroes, $y=0$

$2(x+1)(x-5)=0$

$x=-1,x=5$

-1 and 5 divide the number line in three parts $(-\infty , -1),(-1,5),(5,\infty )$ .

Interval Selected Value $y=2(x+1)(x-5)$ Sign

$(-\infty,-1)$ -2 $y=2(-2+1)(-2-5)=14$ +

$(-1,5)$ 0 $y=2(0+1)(0-5)=-10$ -

$(5,\infty)$ 6 $y=2(6+1)(6-5)=14$ +

So, the function is positive for interval $(-\infty,-1)$ and $(5,\infty)$ .

We can say that the function is positive for interval x < -1 and x > 5.

Therefore, the correct option is B.

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3 years ago

How would the fraction 5/1-sqrt 3. Be written if it’s denominator is rationalized using difference of squares?

Yanka [14]

Answer:

A

Step-by-step explanation:

5/(1-√3)=5*(1+√3)/(1-√3)(1+√3)= (5+5√3)/(1-3)= -(5+5√3)/2

Choice A is correct one

4 0

3 years ago