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2 years ago

3x+7*4x-9 i need to find the fraction

Mathematics

1 answer:

Alexxandr [17]2 years ago

7 0

Hello!☺

$Answer:\boxed{31x-9}$

$Explanation:$

$3x+7\times4x-9$

Let's start off by simplifying:

$3x+28x+-9$

Now combine like terms:

$(3x+28x)+(-9)\\31x-9$

$31x-9$ is your answer.

Hope this helps!☺

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2 years ago

A cyclist rides his bike at a speed of 18 miles per hour. What is this speed in feet per second? How many feet will the cyclist

Kisachek [45]

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Step-by-step explanation:

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Now, According to question

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3 years ago

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2 years ago

9. 3x + 9y = 18 y = x + 2 Substitution method

777dan777 [17]

Answer:

x = 0

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Step-by-step explanation:

3x + 9y = 18 ---------eqn 1

y = x + 2---------eqn 2

Substitute eqn 2 into eqn 1, for the value of y

3x + 9( x + 2) = 18

3x + 9x + 18 = 18

12x + 18 = 18

12x = 18 -18

12x = 0

Divide both sides by 12 , to get the value of x.

12x/ 12 = 0/12

x = 0

Substitute x = 0 into eqn 2

y = x + 2

y = 0 +2

y = 2

Hint: to confirm the values

x = 0

y = 2

Let's take eqn 1 ,

3x + 9y = 18

3(0) + 9(2)

= 0 + 18

= 18

Correct

Let's take eqn 2

y = x + 2

Let's find y

y = 0 + 2

y = 2

Correct too

4 0

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