2 years ago

How do the 3s in 7.315 and 893.5 compare?

Mathematics

2 answers:

mash [69]2 years ago

7 0

Answer:

1/10 the value is 100% right!

Step-by-step explanation:

Naya [18.7K]2 years ago

3 0

Answer:

1/10 i took the quiz and this was righ

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Frick and frack are surveying the times it takes students to arrive at school from home. There are 2 main groups of commuters wh

noname [10]

Answer:

900

Step-by-step explanation:

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3 years ago

Express f(x) = |x-2| +|x+2| in the non-modulus form. Hence, sketch the graph of f.

alexgriva [62]

Recall that

$|x|=\begin{cases}x&\text{if }x\ge0\\-x&\text{if }x$

There are three cases to consider:

(1) When $x+2$ , we have $|x+2|=-(x+2)$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)-(x+2)=-2x-4$

(2) When $x+2\ge0$ and $x-2$ , we get $|x+2|=x+2$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)+(x+2)=4$

(3) When $x-2\ge0$ , we have $|x+2|=x+2$ and $|x-2|=x-2$ , so

$|x-2|+|x+2|=(x-2)+(x+2)=2x$

So

$|x-2|+|x+2|=\begin{cases}-2x-4&\text{if }x$