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harkovskaia [24]
3 years ago
8

Graciela was trying to solve the quadratic equation x2+2.5x−1.5=0 "I think I need to use the Quadratic Formula because of the de

cimals," she told Walter. Walter replied, "I'm sure there's another way! Can't we rewrite this equation so there aren't any decimals?"
Mathematics
1 answer:
drek231 [11]3 years ago
7 0

Answer:

The answer to your question is  x² + 5/2x - 3/2 = 0

Step-by-step explanation:

Data

Quadratic equation           x² + 2.5x - 1.5 = 0

Process

1.- Convert the decimals into fractions

2.5 = 25/10 = 5/2

1.5 = 15/10 = 3/2

2.- Substitution

                                       x² + 5/2x - 3/2 = 0

3.- Conclusion

I rewrite the equation, now it is expressed in fractions. It could be solve by factoring.

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Step-by-step explanation:

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3 years ago
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Please help answer number 4!
solong [7]
The image is black, what’s the question?
4 0
3 years ago
What is the value of the sum of all the terms of the geometric series 300, 60, 12, …?
ruslelena [56]
<h3>Answer:   375</h3>

=========================================

Work Shown:

a = 300 = first term

r = 60/300 = 0.2 = common ratio

We multiply each term by 0.2, aka 1/5, to get the next term.

Since -1 < r < 1 is true, we can use the infinite geometric sum formula below

S = a/(1-r)

S = 300/(1-0.2)

S = 300/0.8

S = 375

----------

As a sort of "check", we can add up partial sums like so

  • 300+60 = 360
  • 300+60+12 = 360+12 = 372
  • 300+60+12+2.4 = 372+2.4 = 374.4
  • 300+60+12+2.4+0.48 = 374.4+0.48 = 374.88

and so on. The idea is that each time we add on a new term, we should be getting closer and closer to 375. I put "check" in quotation marks because it's probably not the rigorous of checks possible. But it may give a good idea of what's going on.

----------

Side note: If the common ratio r was either r < -1 or r > 1, then the terms we add on would get larger and larger. This would mean we don't approach a single finite value with the infinite sum.

3 0
3 years ago
How do I choose a method to find the product
Mrrafil [7]
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3 years ago
Jameson has 4300 in credit card debt with 14% interest that he wants to pay off in 24 months. He will need to make monthly payme
lakkis [162]

Answer:

Total cost of repayment  = 4955.04

Net interest paid = 655.04

Step-by-step explanation:

Given

Amount taken on loan = 4300

Repayment plan

Monthly installment= 206.46

Yearly installment  = 206.46 * 12 = 2477.52

Rate of interest per year = 14 %

Time Period for repaying the loan = 2 years

The total amount repaid by Jameson at the rate of 206.46 per month for next 24 months

= 206.46 *24\\= 4955.04

Net interest paid

= 4955.04 - 4300\\= 655.04

Total cost of repayment  = 4955.04

Net interest paid = 655.04

8 0
3 years ago
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