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dsp73
3 years ago
9

-2 - (-4) = -7- (-14) = - 12 - (-32) =

Mathematics
2 answers:
Verdich [7]3 years ago
8 0

Answer:

2

7

20

Step-by-step explanation:

asdf

astraxan [27]3 years ago
3 0

Answer:

2

7

20

Step-by-step explanation:

-2 - (-4) =

2 negatives = a positive

-2 + 4 = 2

-7- (-14) =

2 negatives = a positive

-7 + 14 = 7

- 12 - (-32) =

2 negatives = a positive

-12 + 32 = 20

Hope this helped!

Have a supercalifragilisticexpalidocious day!

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Can 0.277778 be converted into a whole number?
Yakvenalex [24]

Answer:

No.

Step-by-step explanation:

This decimal's simplified form is 0.3

Whole numbers are numbers without fractions, decimals, or negative values

ex: 0, 1, 2, 3, 4, infinity

8 0
3 years ago
Miriam has 62 feet of fencing to make a rectangular vegetable garden. Which dimensions will give Miriam the garden with greatest
lidiya [134]
Perimeter: P=62 feet
P=2(b+h)
62=2(b+h)
Dividing both sides of the equation by 2:
62/2=2(b+h)/2
31=b+h
b+h=31   (1)

Area: A=bh   (2)

Isolating h in equation (1)
(1) b+h=31→b+h-b=31-b→h=31-b   (3)

Replacing h by 31-b in equation (2)
(2) A=bh
A=b(31-b)
A=31b-b^2

To maximize the area:
A'=0

A'=(A)'=(31b-b^2)'=(31b)'-(b^2)'=31-2b^(2-1)→A'=31-2b

A'=0→31-2b=0
Solving for b:
31-2b+2b=0+2b
31=2b
Dividing both sides by 2:
31/2=2b/2
31/2=b
b=31/2=15.5

Replacing b by 31/2 in equation (3)
h=31-b
h=31-31/2
h=(2*31-31)/2
h=(62-31)/2
h=31/2

The dimensions are 31/2 ft x 31/2 ft = 15.5 ft x 15.5 ft
The area with these dimensions is: A=(15.5 ft)(15.5 ft)→A=240.25 ft^2

These dimensions are not in the options

1) The first option has an area of: A=(18 ft)(13 ft)→A=234 ft^2
2) The second option has an area of: A=(19 ft)(12 ft)→A=228 ft^2
3) The third option has an area of: A=(17 ft)(14 ft)→A=238 ft^2

The third option has the largest area.

Answer: Third option  
 
4 0
3 years ago
Read 2 more answers
What is the solution to the equation x + 5.7 = 6.1?
Ann [662]

The solution is X=0.4

4 0
3 years ago
Read 2 more answers
Why is the number 6 scared of the number 7?
Lady_Fox [76]
This is a well known joke:

Why six afraid of seven? Because seven ate nine!

It is supposed to be a "word game" where instead of writing eight, the authour wrote ate, which sound the same but means something different.


Hope it helped,

Happy homework/ study/ exam!
8 0
3 years ago
Read 2 more answers
An FM radio station broadcasts at 84 megahertz (MHz). What is the energy of each photon in Joule? Use h = 6.6 * 10 ^ (- 34) * j
iragen [17]

Answer:

E=5.544*10^{-26} J

Step-by-step explanation:

The equation for photon energy is given by:

E=hf

Where:

h=Planck\hspace{3}constant=6.6*10^{-34} \\f=Frequency\hspace{3}of\hspace{3}the\hspace{3}wave=84000000Hz

This equation telling us that the higher the frequency of the photon, the greater its energy. And the longer the photon wavelength, the lower its energy.

So, replacing the data provided in the previous equation:

E=(6.6*10^{-34} )*(84000000)=5.544*10^{-26} J

7 0
4 years ago
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