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3 years ago

Which is the best first step in solving the following system of equations y=7x+3 y=9x

Mathematics

2 answers:

Vanyuwa [196]3 years ago

8 0

Answer:

13.5 and 1.5

Step-by-step explanation:

y=7x+3

y=9x

9x=7x+3

2x=3

x=3/2

y=9(3/2)

y=13.5

Fed [463]3 years ago

3 0

Answer:

Replace the y value in y=7x+3 with 9x

Answer: x=3/2

Step-by-step explanation:

y=7x+3; y=9x

9x=7x+3

Subtract 7x from both sides

2x=3

Divide by 2 on both sides

x=3/2

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Answer:

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3 years ago

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3 years ago

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Semenov [28]

Answer:

(x-1) is a factor of the polynomial.

Step-by-step explanation:

Given:

f(x) = x³ + 6x² + 3x - 10

It is required to find which option is a factor of the given polynomial.

Factor the term (-10):

-10 = 1 * -10

= -1 * 10

= 2 * -5

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As the given options are: (x+1) , (x-1) , (x-2) , (x-10)

So, the possible roots are: -1 , 1 , 2 , 10

So,

we will Check the values -1 , 1 , 2 , 10 to find which of them will make f(x)= 0

If x = -1 ⇒ f(x) = (-1)³ + 6*(-1)² + 3*(-1) - 10 = -1 + 6 - 3 - 10 = -8

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So, x = 1 is one of the roots ⇒ (x-1) is one of the factor

The other values { 2 , 10} also are not the roots of the function

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