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3 years ago

Solve 5x - (2x + 2) = x + (3x + 5) (make sure to type the number only)

Mathematics

1 answer:

Anit [1.1K]3 years ago

7 0

Answer:

Step-by-step explanation:

To solve this problem we need to find x

First we need to do parenthesis

This means that the equation becomes 5x - 2x - 2 = x + 3x + 5

Next add or subtract, this simplifies it to 3x - 2= 4x + 5

After this bring the numbers on the right and the variables on the left

This means subtracting 4 on each side and adding 2 on each side

Now the equation becomes -x = 7

Lastly, put the negative on the right

x = 7

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3 years ago

Which value of c completes the square in the expression x2 + 14x + c?

stealth61 [152]

The answer is letter D

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3 years ago

See the pic below please! AND SHOW WORK!

irinina [24]

Well I don't know !
Let's check out the choices:

A). 3a - 4b = 21, a=0, b=7

   3(0) - 4(7) = 21

   0 - 28 = 21 Nope. That's not true.

B). 3a - 4b = 21, a=-3, b=2

   3(-3) - 4(-2) = 21

   -9 + 8 = 21

   -1 = 21 Nope. That's not right.

C). 3a - 4b = 21, a=-2, b=-3

      3(-2) - 4(-3) = 21

   -6 + 12 = 21

   6 = 21 Nope. That's not it.

Only one choice left.
This one had better be it:

D). 3a - 4b = 21, a=7, b=0

   3(7) - 4(0) = 21

   21 - 0 = 21

   21 = 21 Yay ! That's it !

7 0

3 years ago

Read 2 more answers

Pls help this is urgent I'll give anyone who answers brainiest answer

tia_tia [17]

Cross multiply,

4(x+1) = -3(2x-1)

4x+ 4 =- 6x + 3

10x = -1

x = -1/10

Answer: -1/10

3(1-2x) = 4(5-x)

3 - 6x = 20 - 4x

-17 = 2x

x = -17/2

Answer: -17/2

4 0

3 years ago

Prove the polynomial identity.

Kaylis [27]

Answer:

Proven

Step-by-step explanation:

We prove the polynomial with factorization. We must first simplify the expression before we can factorize:

$(4\cdot{x^2}-2)\cdot{(4\cdot{x^2}-2)}-16\cdot{x^4}$

$16\cdot{x^4}-8\cdot{x^2}-8\cdot{x^2}+4-16\cdot{x^4}$

$4-16\cdot{x^2}$

4 is the common number and we can take it out of the expression:

$4\cdot{(1-4\cdot{x^2})}$

We can factorize further with the x term being zero. For this to be true we must have -2x and 2x to cancel out and therefore the expression is proven:

$4\cdot{(1-2\cdot{x})}\cdot{(1+2\cdot{x})}$

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3 years ago