4 years ago

Find the difference (3-2x+2x^2)-(4x-5+3x^2)

Mathematics

1 answer:

attashe74 [19]4 years ago

3 0

5x^2+2x-2 if that is a help tell me what I have to find

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12x+3=15x solve for x

malfutka [58]

$12x+3=15x\ \ \ \ |subtract\ 3\ from\ both\ sides\\\\12x=15x-3\ \ \ \ \ |subtract\ 15x\ from\ both\ sides\\\\-3x=-3\ \ \ \ \ |divide\ both\ sides\ by\ (-3)\\\\\boxed{x=1}\\\\check:\\\\L=12\cdot1+3=12+3=15\\R=15\cdot1=15\\\\L=R\ :)$

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3 years ago

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The age difference between the two brothers is 5. 7 years later, the age of the elder brother will be 3 times bigger than the ag

saw5 [17]

Answer:

y = 4 and x = 9

Step-by-step explanation:

I hope this is correct

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3 years ago

Which choice is equivalent to the expression below? 12^-2 12 Points!!!!

Brut [27]

Step-by-step explanation:

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Solve the inequality 3 + 9x >4(x+7) pls help

alexandr402 [8]

Answer:

x<5

Step-by-step explanation:

the greater sign will firstly be changed to = for better solving so we obtain

3+9x=4(x+7)by opening bracket

3+9x=4x+28

9x-4x=28-3

5x=25

divide all through by 5x

we obtain

x=5

the greater sign change here

which is x<5

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3 years ago

Anna buys 12 pens and 20 pencils for a total cost of $16. One pen costs $0.40 more than a pencil. What would one pencil and one

vladimir2022 [97]

It is given in the question that

Anna buys 12 pens and 20 pencils for a total cost of $16. One pen costs $0.40 more than a pencil.

Let the cost of pencil is $ x .

Therefore cost of pen is

$$(x+0.40)$

According to the question

$12(x+0.40)+20x =16$

Distributing 12 and combining like terms, we will get

$12x+4.8+20x=16\\32x = 11.2\\x = 0.35$

Therefore cost of pencil is $0.35 and cost of pen is

$0.35+0.40=0.75$

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3 years ago