jaliaaa67 jaliaaa67
  • 11-05-2020
  • Mathematics
contestada

Given that a = 10,
b = 2x + 5, and
ab = 6x² +11x-10, find x.

A. 8/10
B. 7/2
C. 4
D. 6

Respuesta :

Аноним Аноним
  • 11-05-2020

Since [tex]a = 10[/tex] and [tex]b = 2x + 5[/tex], we have

[tex]ab=10(2x+5)=20x+50[/tex]

So, the equation becomes

[tex]ab = 6x^2 +11x-10 \iff 20x+50= 6x^2 +11x-10 \iff 6x^2-9x-60=0[/tex]

The solutions to this equation are 4 and -5/2, so I'm afraid there's a typo in your question.

Answer Link
gltench8602 gltench8602
  • 11-06-2021

Answer:

4

Step-by-step explanation:

used the calculator and plugged it in while taking the test. this is correct

Answer Link

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