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3 years ago

Using the properties of absolute values, simplify the expression x×|x|, if it is known that:

Mathematics

1 answer:

Westkost [7]3 years ago

7 0

Answer:

x ≥ 0: x|x| = x²
x < 0: x|x| = -x²

Step-by-step explanation:

|x| = x

x|x| = x(x) = x²

|x| = -x

x|x| = x(-x) = -x²

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Can someone help answer b plzzz

BartSMP [9]

No she is not correct
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ANSWER: No

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2 years ago

The 1992 world speed record for a bicycle (human-powered vehicle) was set by Chris Huber. His time through the measured 200 m st

Reil [10]

Answer:

a) 30.726m/s and b) 5.5549s

Step-by-step explanation:

a.) What was Chris Huber’s speed in meters per second(m/s)?

Given the distance and time, the formula to obtain the speed is

$v=\frac{d}{t}$ .

Applying this to our problem we have that

$v=\frac{200m}{6.509s}= 30.726m/s$ .

So, Chris Huber’s speed in meters per second(m/s) was 30.726m/s.

b) What was Whittingham’s time through the 200 m?

In a) we stated that $v=\frac{d}{t}$ . This formula implies that

$t=\frac{d}{v}$ .

First, observer that $19\frac{km}{h} =19,000\frac{m}{h}=\frac{19,000}{3,600}m/s= 5.2777m/s$ .

Then, Sam Whittingham speed was equal to Chris Huber’s speed plus 5.2777 m/s. So, $v=30.726\frac{m}{s} +5.2777\frac{m}{s}= 36.003 m/s.$

Then, applying 1) we have that

$t=\frac{200m}{36.003m/s}=5.5549s.$

So, Sam Whittingham’s time through the 200 m was 5.5549s.

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3 years ago

Mariana runs at a rate of 300 meters how far does she run in 8 minutes

IgorC [24]

Answer:

well if this is by 300meters in one minutes then it would be 2400 meters

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3 years ago

What is the volume of a cube that has a side length of 5 centimeters? Recall the formula .

mixas84 [53]

The answer would be 125

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3 years ago

Read 2 more answers

Please help me find the area of this irregular shape.

ANTONII [103]

Answer:

23 Cm(2)

Step-by-step explanation:

Sincerest Apologies if it is incorrect

if it's not 23 it may be:

26 Cm(2)

6 0

2 years ago