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2 years ago

13

What’s 0 - ( - 4 ) ?

2 answers:

trapecia [35]2 years ago

7 0

Answer:

0-(-4)

0+4

4

is the answer

Stolb23 [73]2 years ago

6 0

Answer:

(positive) 4

Step-by-step explanation:

Think of the double negative like a plus sign that's been spit up. All you need to do is put it back together (put the two negative signs together to make a plus sign) and it makes it a lot easier. (At least that's how I learned to solve double negatives)

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7. The ordered pairs ((-1,-9), (5,9). (7.15)) are included in which function?<br> 14

Sholpan [36]

Answer:

C. y=3x-6

Step-by-step explanation:

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2 years ago

Question 5: prove that it’s =0

mamaluj [8]

Answer:

Proof in explanation.

Step-by-step explanation:

I'm going to attempt this by squeeze theorem.

We know that $\cos(\frac{2}{x})$ is a variable number between -1 and 1 (inclusive).

This means that $-1 \le \cos(\frac{2}{x}) \le 1$ .

$x^4 \ge 0$ for all value $x$ . So if we multiply all sides of our inequality by this, it will not effect the direction of the inequalities.

$-x^4 \le x^4 \cos(\frac{2}{x}) \le x^4$

By squeeze theorem, if $-x^4 \le x^4 \cos(\frac{2}{x}) \le x^4$

and $\lim_{x \rightarrow 0}-x^4=\lim_{x \rightarrow 0}x^4=L$ , then we can also conclude that $\im_{x \rightarrow} x^4\cos(\frac{2}{x})=L$ .

So we can actually evaluate the "if" limits pretty easily since both are continuous and exist at $x=0$ .

$\lim_{x \rightarrow 0}x^4=0^4=0$

$\lim_{x \rightarrow 0}-x^4=-0^4=-0=0$ .

We can finally conclude that $\lim_{\rightarrow 0}x^4\cos(\frac{2}{x})=0$ by squeeze theorem.

Some people call this sandwich theorem.

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2 years ago

Sam have 10 books and Mary have 10 books too how manny books they all have

andreev551 [17]

Sam and Mary have 20 books.

8 0

2 years ago

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Use your knowledge on the triangle proportionality theorem to find the missing side length indicated. Be sure to explain the pro

ikadub [295]

Answer:

? = 4.29

Step-by-step explanation:

Remark

Let x be the question mark. You get the proportionality by using the dimensions of the little triangle to the dimensions of the large triangle.

Equation

14/(14+ 4) = 15/(x + 15) Combine like terms on the left

14/18 = 15/(x + 15) Cross multiply

14*(x + 15) = 18 * 15 Simplify the right

14(x + 15) = 270 Divide by 14

x + 15 = 270 / 14

x + 15 = 19.29 Subtract 15 from both sides

x = 19.29 - 15

x = 4.29

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2 years ago

What are all of the keys that must be pressed, in correct

Marta_Voda [28]

The answer is number 1

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2 years ago

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