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klio [65]
3 years ago
15

during a long race a professional cyclist was able to sustain a speed of 20 miles per hour. How far could this cyclist travel at

that speed for 2 hours, 3 hours, and 3.5 hours?
Mathematics
1 answer:
ValentinkaMS [17]3 years ago
4 0
You would just be multiplying, 20m by 2hr, 3hr, and 3.5hr. So 40, 60, and 70. <span />
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Conjecture #2- The product of two rational numbers is always?
Gala2k [10]

Answer:

Rational

Step-by-step explanation:

It is always going to be RATIONAL.

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3 years ago
Please review the following attachment. Thanks!
vaieri [72.5K]

Answer:

C: I and III only.

Step-by-step explanation:

We have two numbers x and y such that:

-y

And we want to determine which of the following conditions must be true.

First, let's examine the third condition. We have:

y>0

To see if this is true, let's try a negative value for y. So, let's use -7. This will give:

-(-7)

Simplify:

7

This is saying we need a number less than -7 and greater than 7.

This is impossible. So, y <em>must be</em> greater than 0.

Therefore, Condition III must be true.

Next, let's see this compound inequality visually.

Picture the following number-line:

<----------(-y)----------0----------y---------->

Whatever y is, -y is just y on the negative side.

Now, since our condition is that -y<x<y, this means that our x can be anywhere between -y and y. Namely:

<----------(-y)----------0----------y---------->

To determine our correct condition, let's picture x anywhere on the bolded lines. I'm just going to put x here...

<----------(-y)-------(x)--0----------y---------->

Now, remember the alternative definition for absolute value. Namely, the absolute value of x is also the <em>distance</em> from 0 to x. And this distance is always positive.

Since our x is between -y and y, our distance from 0 to x will always be less than the distance from 0 to either y.

Therefore, Condition I is also true.

Let's try an example. Let's let y = 9. So, -y=-9. And let's let x be between 9 and -9, say, -2. So:

<---(-9)-----(-2)--0--------(9)------>

We can see that:

|-2|=2\stackrel{\checkmark}{

Also, this example counters Condition II, as our x can indeed be negative if we desire it.

Algebraically, if we have a negative x such that:  

-y

We can divide everything by -1 to obtain:

y>x>-y

We can flip this to get:

-y

Which is our original inequality. So, Condition II does not need to be true.

So, the two conditions that <em>must</em> be true is I and III.

So, our answer is C.

3 0
3 years ago
9 and 11 please I need help
dimaraw [331]
9. <span>1.25 = (1 x 1) + (2/10) + (5/100)

11. is ---C----</span>
5 0
3 years ago
Suppose set A is the set of all U.S. states and set B is the set of all U.S. cities which are state capitals. Now, suppose the r
yarga [219]

Answer:

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8 0
3 years ago
Which literal equation is not equivalent to x equals two y plus z ?
abruzzese [7]

Answer:

x minus z equals two times y

Step-by-step explanation:

x minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times yx minus z equals two times y

4 0
3 years ago
Read 2 more answers
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