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3 years ago

Please help ASAP I will make you brainiest- I need this dont in the next hour!!

Mathematics

1 answer:

satela [25.4K]3 years ago

8 0

Answer:

x ≥ 661.424°F or x[661.424,∞) and x ≤ - 27°F or x(-∞,-27]

Step-by-step explanation:

The melting point of the substance is - 32.78°C, then the melting point in °F is given by

$C = \frac{5}{9} (F - 32)$

⇒ $F - 32 = \frac{9}{5}C$

⇒ $F = 32 + \frac{9}{5} (-32.78)$

⇒ F = - 27.004°F

Again, the boiling point of the substance is 349.68°C, hence, the boiling point in °F is

$F = 32 + \frac{9}{5} (349.68)$

⇒ F = 661.424°F

Therefore, the range of temperature in °F for which the substance will not be in liquid state will be x ≥ 661.424°F or x[661.424,∞) and x ≤ - 27.004°F or x(-∞,-27.004], where x is the temperature of the substance in °F. (Answer)

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The sum of two numbers is 44 and the difference is 14. What are the numbers?

Fudgin [204]

Answer:

Hope it may help u

Step-by-step explanation:

The sum of two numbers is 44 and their difference is 14. What are the two numbers? Let's start by calling the two numbers we are looking for x and y.

The sum of x and y is 44. In other words, x plus y equals 44 and can be written as equation A:

x + y = 44

The difference between x and y is 14. In other words, x minus y equals 14 and can be written as equation B:

x - y = 14

Now solve equation B for x to get the revised equation B:

x - y = 14

x = 14 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 44

14 + y + y = 44

14 + 2y = 44

2y = 30

y = 15

Now we know y is 15. Which means that we can substitute y for 15 in equation A and solve for x:

x + y = 44

x + 15 = 44

X = 29

Summary: The sum of two numbers is 44 and their difference is 14. What are the two numbers? Answer: 29 and 15 as proven here:

Sum: 29 + 15 = 44

Difference: 29 - 15 = 14

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3 years ago

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Given q(x)=3x and r(x)=x2. What is (r◦q)(2)?

guapka [62]

Answer:

Step-by-step explanation:

$(r\circ q)=(x)=r\bigg(q(x)\bigg)\\\\r(x)=x^2;\ q(x)=3x\\\\\text{substitute}\\\\(r\circ q)(x)=(3x)^2=3^2x^2=9x^2\\\\(r\circ q)(2)=9(2^2)=9(4)=36$

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3 years ago

How can i solve this maths problem z÷3=8

Delicious77 [7]

You would multiply both sides by 3 to cancel out the divide 3.
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4 years ago

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If the square root of n is approximately equal to 4.2, then n is between _____.

Sliva [168]

Answer:

16 and 25

Step-by-step explanation:

Given that the square root of n = 4.2, let's find an expression for this, then find the possible value of n.

Thus:

$\sqrt{n} = 4.2$

Solve for n. Square both sides.

$(\sqrt{n})^2 = (4.2)^2$

$n = 17.64$

Therefore, if the sqrae root of n was approximately equal to 4.2, then we can conclude that n is between 16 and 25.

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4 years ago

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Donal currently has 7,200 points in his fantasy baseball league, which is 20% more point than Scott how many points does scott h

Sati [7]

<u>ANSWER: </u>

Scott has 6000 points in his fantasy baseball league.

<u>SOLUTION: </u>

Given, Donal currently has 7,200 points in his fantasy baseball league.

It is 20% more points than Scott points.

We need to know how many points does scott have?

Let the points with scott be x.

Then, according to give information

Donal points = scott points + 20% of scott points

$\begin{array}{l}{7200=x+20 \% \times x} \\\\ {7200=x+\frac{20}{100} \times x} \\\\ {7200=x+\frac{1}{5} \times x} \\\\ {7200=x+\frac{x}{5}}\end{array}$

By multiplying with 5 on both sides, we get

$\begin{array}{l}{7200 \times 5=5 \times x+x} \\\\ {36000=5 x+x} \\\\ {6 x=36000} \\\\{x=\frac{36000}{6}} \\\\ {x=6000}\end{array}$

Hence, scott has 6000 points in his fantasy baseball league.

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