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erik [133]
3 years ago
15

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour after the time that she first checked

her outdoor thermometer. By 6 a.m., the temperature had fallen 21 degrees. Which expression can you use to find how many hours earlier she had first checked the thermometer?
Negative 21 divided by negative 1.4
Negative 1.4 divided by negative 21
Negative 21 divided by 1.4
21 divided by negative 1.4
Mathematics
2 answers:
dalvyx [7]3 years ago
8 0

Answer:

The correct answer is: A

Step-by-step explanation:

I did the test on edge :>

kakasveta [241]3 years ago
4 0

Answer:A not b or c or d A!!

Step-by-step explanation:

You might be interested in
Help me find surface area of this shape
lozanna [386]
The triangle <span>pyramid</span>  is made up of 4 triangles.

------------------------------------
Formula:
------------------------------------
Area of triangle = 1/2 x base x height

------------------------------------
Area of the bottom triangle:
------------------------------------
Area = 1/2 x 9 x 7.8
Area = 35.1 yd²

------------------------------------
Area of the 3 side triangles:
------------------------------------
Area = 3 [ 1/2 x 9 x 10 ]
Area = 135 yd²

------------------------------------
Total Area:
------------------------------------
Total Area = 135 + 35.1 
Total Area = 170.1 yd²

------------------------------------------------------------------------
Answer: Surface Area = 170.1 yd².
------------------------------------------------------------------------

4 0
3 years ago
g What is the probability of being dealt exactly three of a kind (like three kings or three 7’s, etc.) in a five card hand from
Elena L [17]

Answer: 0.02257

Step-by-step explanation:

Given : Total cards in a deck = 52

Number of ways to select any 5 cards : ^{52}C_5

Since , there are total 13 kinds of card (includes Numbers from 2 to 9 and Ace , king, queen and jack).

Of each kind , there are 4 cards.

Number of ways to select three cards in a five card hand of a single kind : ^{4}C_3\times^{48}C_2

Number of ways to select three cards in a five card hand of a exactly three of a kind : 13\times^{4}C_3\times^{48}C_2

Now , the required probability = \dfrac{13\times^{4}C_3\times^{48}C_2}{^{52}C_5}

=\dfrac{13\times4\times\dfrac{48!}{2!46!}}{\dfrac{52!}{5!47!}}\\\\\\=\dfrac{58656}{2598960}

=0.022569027611\approx0.02257

∴ The probability of being dealt exactly three of a kind (like three kings or three 7’s, etc.) in a five card hand from a deck of 52 cards= 0.02257

8 0
3 years ago
Evaluate the following when x = 3<br> 2x+ 5(x)
Nina [5.8K]

Hi!

I can help you with joy!

Evaluate:

\fbox{2x+5x} when \fbox{x=3}

First, add x's:

\rm{7x}

Now, plug in the value of x (3)

\rm{7(3)

Multiply:`

\rm{21} (Answer)

Hope it helps!

Ask me if you have any doubts.

  • Enjoy Your Day/Night! :)

<em>Answered by</em>

<em>~</em>Silent~

4 0
2 years ago
Help please.........................
Juli2301 [7.4K]

Answer is

8 and 2

I hope this helps

6 0
2 years ago
Please help! I mark brainliest :3
vladimir1956 [14]
no for a
yes for B
no for c
that what I think It is opinion could be wrong
3 0
3 years ago
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