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zmey [24]
4 years ago
14

Discussion Topic

Mathematics
1 answer:
balandron [24]4 years ago
8 0
Variables are difficult and confusing to me, but I get them enough to solve equations.  For example, for some equations that I am doing now, they are; 2x^2 + 4x + 10, and there are variables that you can use for these.  You could have, A(x)^2 + B(x) + C for your problem and you had to plug all of the variables in.  A=2, B=4, C=10.  Then you have your equation right there.  

In real life, there are variables that you have to have for everyday life.  If your job is in construction, or you are pouring concrete and you need volume or surface area, you would use a variable for the radius, r.  When you buy gas and you want to figure your miles per gallon cost/ratio, your variable is simple.  Say I drove 100 miles, and I have a 20 gallon tank and I want to figure out the miles per gallon.  100/20=x.  Or if you don't know how many gallons go in your tank, it is 100/y=x.  Then when you fill your vehicle up and you figure out how many gallons go into your tank, you eliminated both of your variables right then and there.  100/20=5.  

When you go to grocery stores, the sales tax is the variable.  Say you bought $95.34 worth of stuff, and you don't know your sales tax, that is your variable.  $95.34 + x% = y.  Then you figure out your sales tax, and you eliminated your variables, say your sales tax is 11.5%, move the decimal point to the left two times and you have your decimal, and multiply your number by it.  Your sales tax is $10.96, and your total is $106.30.  

So no matter how confusing and ridiculous variables seem, especially when you have super long problems that take 5 - 10 minutes to solve, variables are used in real life and they are important when you are doing a job that you are constantly using math and other things.  

I do hope I helped you out.  
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Please answer the following questions I will give out brainliest!!!
riadik2000 [5.3K]
Question 14:
We are given that:
C = πd
To solve for d, we need to isolate the d on one side of the equation. This means that we need to get rid of the π next to the d.
In order to do so, we can simply divide both sides of the equation by π as follows:
C/π = πd/π
d = C/π .........> The first option 

Question (15):
We are given that:
d = rt
To solve for r, we need to isolate the r on one side of the equation. This means that we need to get rid of the t next to the r.
In order to do so, we can simply divide both sides of the equation by t as follows:
d/t = rt/t
r = d/t.........> The third option 

Hope this helps :)
5 0
3 years ago
Read 2 more answers
Ali earned $341 on Friday . If she was paid $22 per hour for the first 8 hours and time and a half for each overtime hour, calcu
nalin [4]

Answer:

she worked 7.5 hours of over time

Step-by-step explanation:

22x8=176

341-176=165

165/22=7.5

4 0
3 years ago
Plz help me asap plz i need help
Nadya [2.5K]
Don’t no but will check on goggles
3 0
3 years ago
I need help! This is too hard
Galina-37 [17]
To start, this is an interest problem, meaning you will have to use I=prt where I is the total interest, p is the principle amount, r is the rate, and time is the amount of time in years. Since you know the principle rate is $1200, the rate is 3.9%, and the time is 8 months, you can plug this into the formula. However, keep in mind that you have to convert 3.9% to a decimal before putting it into the formula and the time must be represented in years. 3.9% represented as a decimal would be 0.039 and 8 months would be represented as 8/12 or 2/3 (since there are 12 months in one year). Now that you have this information, plug the values into the formula: i=(1200)(0.039)(2/3). When simplified, you get your answer as $31.20.
6 0
4 years ago
Read 2 more answers
Determine whether the set can be sides of a right triangle. Use the Pythagorean theorem: 14, 28, 50
Keith_Richards [23]

Answer:

No, this isn't a right triangle.

Step-by-step explanation:

First of all, the hypotenuse is the longest side (in this case that is 50), so that's what we're working for.

The formula for the Pythagorean theorem is :

a^{2} +b^{2} =c^{2}

14 squared equals 196, and 28 squared equals 784. Add these and you get 980. The square root of 980 is not 50, so we know that this is not a right tryangle.

3 0
2 years ago
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