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Varvara68 [4.7K]
3 years ago
13

PLEASE HELP!!

Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Step-by-step explanation:

  • 5^-2= 1/25 (as when taken up 25 it becomes 5^-2).
  • 2^5= 32 (when we multiply 2 for 5 times, we get 32).(2×2×2×2×2)
  • 2^-4=1/16 (as when we take up 16 we get 2^-4)
  • 5^3=125 (when we multiply 5 for 3 times we get 125)(5×5×5)

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

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A thermometer is taken from a room where the temperature is 23oC to the outdoors, where the temperature is −9oC. After one minut
Helga [31]

Answer:

(a)\ 15\textdegree C\\(b)\ After\ 3\ minutes\ and\ 52.5\ Seconds\ from\ start

Step-by-step explanation:

Temperature in the room =23\textdegree C

Decrease in the temperature(outdoors)=23-15=8\textdegree C in 1\ minute.

Rate of decrease=8\textdegree C/minute

Let\ after\ x\ minutes\ temperature\ is\ y\\y=23-8x\ \ \ \ y\geq -9\textdegree C

(a) After 4\ more\ minutes\ total\ time\ is=1+4=5\ minutes

y=23-5\times 8\\y=-17\\

But it is not possible as outdoor temperature is -9\textdegree C so after -9\textdegree C temperature decrease will not occur.

Hence after 4 more minutes temperature=-9\textdegree C

(b) Let after t\ minutes temperature is -8\textdegree C

Here x=t,\ y=-8\textdegree C

-8=23-8x\\8x=23+8\\8x=31\\x=\frac{31}{8}\\x=3.875\ minutes=3\ minutes\ and\ 52.5\ seconds

3 0
3 years ago
What is the factorization of the trinomial below? -X^2 - 2x + 48
raketka [301]

Answer:

<h3><em><u>I</u></em><em><u> </u></em><em><u>think</u></em><em><u> </u></em><em><u>option</u></em><em><u> </u></em><em><u>C</u></em><em><u>.</u></em></h3>

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3 0
3 years ago
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On a number line, a number, b, is located the same distance from 0 as another number, a, but in the opposite direction
Karolina [17]

Answer:

b = -a

Step-by-step explanation:

We know that:

On a number line, the distance between 0 and b is the same distance that between 0 and a (but b and a are in opposite sides of zero).

And we know that, for example, when:

b = 2,  a = -2

Remember that the distance between two values is given by:

|n - m|

Then the distance between 0 and b is:

|0 - b|

and the distance between 0 and a is:

|0 - a|

we have:

|-b| = |-a|

|b| = |a|

But the numbers are in opposite sides of the zero, so one must be positive and the other negative, then we can conclude that:

b = -a

or

-b = a

(these are equivalent)

Then the correct option is the first option:

b = -a

6 0
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Omg i can help you because I was having trouble with the same thing! so the Total Surface Area= Ph+2B meaning you have to find the P=perimeter Lx2+Wx2, then the height, then base. the lateral area is Ph+B :)!!
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Ierofanga [76]
The answer of the first photo is -6/5
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3 years ago
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