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Blababa [14]
3 years ago
9

7x + 3(5 - 3x) =5 x=?

Mathematics
1 answer:
harina [27]3 years ago
6 0

Answer:

x=5

Step-by-step explanation:

7x+15-9x=5

-2x+15=5

-2x=-10

x=5

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PLSSS HELP ASAP<br> solve questions 1-5 please
sertanlavr [38]

#1. 4x^2 + 17 - 15 = 0

Use the roots given, and plug them in to a factored form. Then, foil! It can also be helpful to multiply the equation to get rid of decimals/fractions.

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x^2 + 4.25 - 3.75 = 0 (multiply everything by 4)

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We are looking for two terms that multiply to equal a * c, and add up to equal b. We know that 8 + 8 = 16, and 8 * 8 = 64. There are no negatives in this equation, therefore both signs in our factored form are positive.

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#5. x = -8, 8

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