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3 years ago

What is 13x= 2x+26-12.5?

Mathematics

2 answers:

ololo11 [35]3 years ago

7 0

13x = 2x + 26 - 12.5

Subtract 26 and 12.5...

13x = 2x + 13.5

Subtract 2x....

11x = 13.5

x = 1.23

Ulleksa [173]3 years ago

5 0

The answer would be 6, 0.5

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IRISSAK [1]

Answer:

<h2>The x-interecepts are 5.6 and -1.4, approximately.</h2>

Step-by-step explanation:

The given equation is

$5x^{2} -21x=39$

Where $a=5$ , $b=-21$ and $c=39$ , let's use the quadratic formula

$x_{1,2}=\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a} =\frac{-(-21) (+-)\sqrt{(-21)^{2} -4(5)(-39)} }{2(5)}\\ x_{1,2}=\frac{21(+-)\sqrt{441+780} }{10}=\frac{21(+-35)}{10}\\x_{1}=\frac{21+35}{10}=\frac{56}{10} \approx 5.6\\ x_{2}=\frac{21-35}{10}=\frac{-14}{10} \approx -1.4$

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