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Svetradugi [14.3K]
2 years ago
6

Need help with number 43 and 45 and need to show the work

Mathematics
1 answer:
Alex787 [66]2 years ago
5 0
43:
       Negative temperatures are basically the same as normal ones, although they go below zero, so they are still the same distance apart from zero, just on the left side of the number line.

      To find the answer find the difference between 30.5°C and 0 (which is 30.5).

      Next, find the difference between -122.2°C and zero (122.2)

       Finally, add 122.2 + 30.5 to find the total distances from the zero combined for the full distances apart from each other.

     (We add them because -122.2 to the left of zero, and 30.5 is on the right)

      You should get 152.7 as your answer.

45:
     I'm guessing since it is asking for the deepest point (-5315) from sea level (0), the answer is -5,315 feet

     *Remember 5,315 is negative because numbers below sea level are all negative*

     So the answer should be -5,315 feet deep. (I'm not sure how to show your work for that I'm guessing it is 0 - 5,315 at the slightest).

 *Hope this all helped :)*

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Dmitry_Shevchenko [17]

Answer:

\huge\boxed{25.2\  m}

Step-by-step explanation:

In order to find the length of the missing side here, we must note that these triangles are similar.

Therefore their lengths are proportionate to each other.

So,

\frac{27.6}{11.5} = \frac{x}{10.5}

We can solve for x by cross multiplying.

10.5\cdot 27.6 = 289.8\\\\289.8 \div 11.5 = 25.2

Hope this helped!

5 0
2 years ago
a child find 29 nickels and dimes. how many dimes are there if the total value of the coins are $2.10?
DaniilM [7]
X represents nickels
y represents dimes
x+y=29
5x+10y=210
multiply the first equation by -5 (elimination method)
-5x-5y=-145
then add the two equations together
5y=65
divide 5 from both sides
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13 dimes
3 0
2 years ago
Read 2 more answers
What is the area of "triangle " XYZ to the nearest tenth of a square inch? Use special right triangles to help find the height.
igomit [66]

Answer:

That is a 30 60 90 triangle.

In such a triangle the "middle" size = short side * sq root (3)

height = 5 * sq root (3) =  8.6602540378

Area = (1/2) * 5 * 8.6602540378

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Area = 21.6506350946 square centimeters

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I need help its a review form a few years ago i cant rember pls answer both
nalin [4]

Answer:

u didnt add the picture

Step-by-step explanation:

3 0
3 years ago
If the equation y² - (K-<br>2y + 2k +1 = 0<br>with equal roots find the value of k​
777dan777 [17]

Answer:

y² - (K-  2)y + 2k +1 = 0

equal roots means D=0

D= b^2 - 4ac

a=1, b= (k-2), c= 2k+1

so,

(k-2)^2 - 4(1)(2k+1) = 0

=> k^2 +4 - 8k -4 = 0

=> k^2 -8k = 0

=> k^2 = 8k

=> k= 8k/k

=> k = 8

Therefore the answer is k= 8

Hope it helps........

8 0
3 years ago
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