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3 years ago

What would be the best first step to solve this (4x-9x)(12+8x)=9(4x)

Mathematics

1 answer:

marin [14]3 years ago

8 0

Answer:

open the brackets is the first step

Step-by-step explanation:

4x(12 + 8x) -9x( 12+8x) = 36x

48x + 32x^2 -108x -72x^2 =36x

32x^2 - 72^2 + 48x - 36x - 108x = 0

-40x^2 -96x = 0

find x using quadratic formular

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3 years ago

You have seven cards, numbered 3 through 9, and you pick one at random. If you pick a card with a prime number, you get 1 point;

Roman55 [17]

Answer:

He has $\frac{-1}{7}$ number of points

Step-by-step explanation:

We have given that numbers from 3 to 9

So numbers will be 3,4,5,6,7,8,9

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And composite numbers are 4,6,8,9

So probability of getting prime number = $\frac{3}{7}$

And probability of getting composite number $=\frac{4}{7}$

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3 years ago

Find the value of x.

allochka39001 [22]

In order to find the value of x, you have to cross multiply both equations. 4x-10 is basically 4 times something subtract 10. Same thing as well for 3x-2. Now it says to find the value of x. X has to also be the same answer for both equation as well. By the way x doesn't have a given number so there is no specific answer.

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