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3 years ago

PLEASE HELP!!!!???: Simplify the expression 13 + (14 + x).

Mathematics

2 answers:

svetlana [45]3 years ago

5 0

Answer: 27 + x

Step-by-step explanation:

Add 13 + 14, which = 27

Now you are left with 27 + x

pantera1 [17]3 years ago

4 0

Answer:

27+ x

Step-by-step explanation:

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Factor this polynomial completely.<br> 12x2+x-6

jonny [76]

Answer:

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Step-by-step explanation:

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3 years ago

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Write the slope intercept form of the equation of the line through the given points

garri49 [273]

Answer:

9) y = -3x - 4

10) y = -1/3x + 14/3

11) y = x - 1

12) y = -7/5x - 18/5

13) y = 3/5x + 9/5

14) y = -2x - 3

Step-by-step explanation:

For this explanation, let's use the last problem as the example. You would use the formula y=mx+b. The first thing you would need to find would be the slope, or m. So, you would find the slope and conclude the answer is -2. After that, you would solve for b and get the answer. Hope this helped!

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3 years ago

I really really really need help!!!!

Yakvenalex [24]

For $f$ to be continuous at $x=1$ , you need to have the limit from either side as $x\to1$ to be the same.

$\displaystyle\lim_{x\to1^-}f(x)=\lim_{x\to1^-}(|x-1|+2)=2$
$\displaystyle\lim_{x\to1^+}f(x)=\lim_{x\to1^+}(ax^2+bx)=a+b$

If $a=2$ and $b=3$ , then the limit from the right would be $2+3=5\neq2$ , so the answer to part (1) is no, the function would not be continuous under those conditions.

This basically answers part (2). For the function to be continuous, you need to satisfy the relation $a+b=2$ .

Part (c) is done similarly to part (1). This time, you need to limits from either side as $x\to2$ to match. You have

$\displaystyle\lim_{x\to2^-}f(x)=\lim_{x\to2^-}(ax^2+bx)=4a+2b$
$\displaystyle\lim_{x\to2^+}f(x)=\lim_{x\to2^+}(5x-10)=0$

So, $a$ and $b$ have to satisfy the relation $4a+2b=0$ , or $2a+b=0$ .

Part (4) is done by solving the system of equations above for $a$ and $b$ . I'll leave that to you, as well as part (5) since that's just drawing your findings.

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3 years ago

Which problem can be solved by division of decimals?

evablogger [386]

Answer:

What is Jeremy’s average if he received a total of 323.7 points on 7 tests?

Step-by-step explanation:

You have to divide 323.7 points by 7 tests so it is the only division problem out of all the problems.

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3 years ago

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A store sells 7 different types of envelopes and 6 different types of postage stamps. How many different combinations are there

solong [7]

Answer

42

Explanation

Let’s say:

Set of envelopes: {a,b,c,d,e,f,g}

Set of postage stamps: {1,2,3,4,5,6}

For an envelope you can have:

1a 2a 3a 4a 5a 6a (6 different combinations)

This applies to all 7 different types of envelopes.

Therefore 7 • 6 = 42

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4 years ago