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Vedmedyk [2.9K]
4 years ago
5

Solve 4x2^- 12x +5=0 by using an appropriate method. Show the steps of your work , and explain why you chose the method used.

Mathematics
1 answer:
schepotkina [342]4 years ago
5 0
4x^2-12x+5=0

a=4
b=-12
c=5

Quadratic method is the easiest to use. Plug in the values into quadratic formula to get possible solutions. Answers are 2.5 and .5

Work:
https://www.calculatorsoup.com/calculators/algebra/quadratic-formula-calculator.php?a=4&b=-12&c=5&action=solve
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the sum of two numbers is 123. when the larger number is added to 5 times the smaller, the sum is 343. find the numbers.​
vovikov84 [41]
Create a system of equations
x + y = 123
5x + y = 343

I use substitution
y = 123 - x
5x + 123 - x = 343
4x + 123 = 343
4x = 220
x = 55

Plug in
x + y = 123
55 + y = 123
y = 68

Check
5x + y = 343
5(55) + 68 = 343
275 + 68 = 343
343 = 343
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What is the equation of the line that passes through the point (-1, -7) and has a<br> slope of 2?
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