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balu736 [363]
3 years ago
8

Pipe with an OD of 6.03 cm and an ID of 4.93 cm carries steam at 250◦C. The pipe is cov- ered with 2.5 cm of magnesia (85%) insu

lation followed by 2.5 cm of polystyrene insulation (k = 0.025 W/m · K). The temperature of the exterior surface of the polystyrene is 25◦C. The thermal resistance of the pipe wa
Mathematics
1 answer:
raketka [301]3 years ago
3 0
Need to answer so5+5 =10
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Evaluate the expression for y = -5
Scorpion4ik [409]

Hey there!

Guide

• Negative & Positive = Negative

• Positive & Negative = Negative

• Negative & Negative = Positive

• Positive & Positive = Positive

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Negatives are BELOW 0

• Positives are ABOVE 0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Positives are on the RIGHT SIDE of the number line

• Negatives are on the LEFT SIDE of the number

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Answering your question

_____________________

-2y

= -2(-5)

= 2(5)

= 10

Therefore, your answer is: 10

Because, both of your numbers were negatives and they both turned into a positive which gave us a positive result

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

8 0
3 years ago
Jim is two years older than his sister Mary. The sum of their ages is greater than 32. Describe Mary’s age. Create and inequalit
-Dominant- [34]

Let the two ages be j and m, respectively.  Then j+m>32.

Solving for Mary's age, we get   m > 32 - j.  Because j = m + 2, m > 32 - (m+2).

Continue solving for m:  Adding m to both sides of this inequality results in

2m > 32 - 2.  Then 2m > 30, and m > 15.  Mary's age is greater than 15.

4 0
3 years ago
A farmer is tracking the amount of wheat his land is yielding each year. He finds that the function f(x) = −x2 + 20x + 75 models
mr_godi [17]

Answer:

Average rate of change: 0

Interpretation: No increment in yield from year 5 to year 15.

Step-by-step explanation:

The function that models the yield is:

f(x)=-x^2+20x+75

f(15)=-(15)^2+20(15)+75=150

f(5)=-(5)^2+20(5)+75=150

The average rate of change  of f(x) from x=a to x=b is given by the formula;

AOC=\frac{f(b)-f(a)}{b-a}

The average rate of change from year 5 to year 15 is:

\frac{f(15)-f(5)}{15-5}

\frac{150-150}{15-5}

\frac{0}{10}=0

Interpretation: There has not been any increment in yield from year 5 to year 15.

6 0
4 years ago
Read 2 more answers
What are translations in math?
Harlamova29_29 [7]

Moving a figure to a different spot on a plane.

7 0
4 years ago
Read 2 more answers
For what value of x is the rational expression below equal to zero x-8 x+8
Verdich [7]
(x−8)/(x+8) = 0 
<span>(x−8) = 0 </span>
<span>x = 8</span>
5 0
3 years ago
Read 2 more answers
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