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ruslelena [56]
3 years ago
9

A speed boat went up the Mississippi River at a speed of 40 mph. It then turned around and traveled downstream to the original s

tarting point at a speed of 60 mph. What was the boat’s average speed? (hint: the answer is NOT 50 mph)
Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
3 0

Answer:

let distance between the two stops be d

so

avg. speed for whole journey = total distance/total time

= ( 2d) / ( d/40 + d/50)

= 2/ (1/40+1/50)

= 2 / ( 90/ 200)

= 2× 200/90

= 40/9 mph

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What is equal to the square root of 16x4
Elena L [17]
Sixteen divided by four equals 64
4 0
3 years ago
Read 2 more answers
Using figure 3 at the right, AB II CD and t is not perpendicular to them, which pair of angles are not congruent?
coldgirl [10]

Answer:

  ∠5 = 95°

Step-by-step explanation:

Where the transversal crosses parallel lines at some angle not a right angle, all of the acute angles are congruent, and all of the obtuse angles are congruent. The acute angles are (obviously) not congruent with the acute angles. Any acute angle is supplementary to any obtuse angle.

Since angles 5 and 6 are a linear pair, the angle relationships of the parallel lines are irrelevant. A linear pair of angles is supplementary.

  ∠6 = 85° . . . . is given

  ∠5 is shown as obtuse, so its measure is ...

  ∠5 = 180° -85° = 95°

_____

<em>Additional comment</em>

85° angles: 2, 3, 6, 7

95° angles: 1, 4, 5, 8

Any angle from the 85° angle list is <em>not congruent</em> with any angle from the 95° angle list. For example, angles 2 and 5 are not congruent.

7 0
3 years ago
In the graph below, the hyperbola gets close to the red lines but never touches
soldier1979 [14.2K]

Answer:

Option A asymptote.

Step-by-step explanation:

Asymptotes are lines to which the graph approaches very it can come very close to it but will never touch it. Asymptote are the limits of a graph.

IN the given graph of Hyperbola the two blue lines representing the Hyperbola are coming too close to the red lines but not touching it .

The two red lines are called the Asymptotoes of the Hyprbola.It is the limit of the Hyperbola.

Step-by-step explanation:

7 0
3 years ago
Which choices are equivalent to the quotient below? Check all that apply.<br><br> √75/√15
Lubov Fominskaja [6]

The value of the fraction is \rm \sqrt{5} , Option D is the correct answer.

The complete question is

Which choices are equivalent to the quotient below? Check all that apply √75/√15 A. 5 B. √25/√5 C. 15/3 D. √5 E. √3 F. √15/√3

<h3>What is a Fraction ?</h3>

When a number is represented by p/q , where q ≠ 0 is called a fraction.

The given fraction is

\rm \dfrac{\sqrt{75}}{\sqrt {15}}\\\\\\\\dfrac{\sqrt{3*5 *5}}{\sqrt {3*5}}\\\\\\\sqrt{5}\\

Therefore , the value of the fraction is \rm \sqrt{5} , Option D is the correct answer.

To know more about Fraction

brainly.com/question/10354322

#SPJ1

6 0
2 years ago
Now we are testing to see whether taking a vitamin supplement each day has significant health benefits. There are no (known) har
ZanzabumX [31]

Answer:

Concluding that people should take vitamin supplement each day when they don't help.            

Step-by-step explanation:

We are given the following in the question:

Hypothesis:

Taking a vitamin supplement each day has significant health benefits and does not have any harmful side effects.

Null hypothesis:

Taking a vitamin supplement each day does not have have significant health benefits.

Alternate hypothesis:

Taking a vitamin supplement each day have have significant health benefits.

Type I error:

  • It the error of rejecting the a true null hypothesis.

So error I for this situation would be concluding that people should take vitamin supplement each day when they don't help.

3 0
3 years ago
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