1 year ago

True or False? A number is either positive or negative

Mathematics

1 answer:

Dmitry_Shevchenko [17]1 year ago

6 0

True

Positive numbers :- 0 , 1 , 2 , 3 , 4

Negative numbers:- - 1 , - 2 , - 3 , - 4

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A motorboat takes five hours to travel two hundred miles going upstream. The return trip takes four hours going down stream. Wha

Yuri [45]

Answer: $45\ mph$ , $5\ mph$

Step-by-step explanation:

Given

A motorboat takes 5 hours to travel 200 miles upstream and 4 hours to go downstream

Suppose the speed of motorboat in still water and rate of current be x and y respectively.

during upstream

$\Rightarrow 5=\dfrac{200}{x-y}\\\\\Rightarrow x-y=40\quad \ldots(i)$

During downstream

$\Rightarrow 4=\dfrac{200}{x+y}\\\\\Rightarrow x+y=50\quad \ldots(ii)$

Add (i) and (ii) we get

$\Rightarrow 2x=90\\\Rightarrow x=45\ mph$

$\therefore y=5\ mph$

Thus, the speed of boat in still water is $45\ mph$ and rate of current is $5\ mph$

8 0

2 years ago

8h + (-7.9d) - 14 + 5d - 3.4h

Fynjy0 [20]

☁️ Answer ☁️

So I got:

-2.9d + 4.6h - 14

Hope it helps.

Have a nice day hyung/noona!~ ￣▽￣❤️

7 0

3 years ago

Name the property illustrated.<br><br> (10 + 1) + 9 = 10 + (1 + 9)

Alexxandr [17]

Associative property of addition

5 0

2 years ago

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If a rectangle or prism has a volume of 432 in.³ and the height of the prism is 9 inches what are the dimensions of the base

Deffense [45]

You first do 432 divided by 9 which is 48. However, there could be multiple dimensions for the base because 48 is a composite number. One example could be 6 by 8

4 0

2 years ago

An office is divided into 12 cubicles. How many of the cubicles are carpeted if 1/3 of the cubicles are carpeted

11Alexandr11 [23.1K]

12÷3=4
cause 1/3 in this situation is 3 cause 12÷4 is 3

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2 years ago