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2 years ago

-6(x + 7) = -4x - 2

Mathematics

2 answers:

almond37 [142]2 years ago

5 0

Answer:

one

Step-by-step explanation:

-6x -6×7 = -4x-2 :

-6x -42 = -4x -2 : (+4x)

-2x -42 = -2 : (+42)

-2x = 40 (/-2)

x = -20

Wittaler [7]2 years ago

4 0

Answer:

-2x-44

Step-by-step explanation:

-6x-42=-4x-2

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Simplify (-2x^3)^2 x y x y^9

nadezda [96]

Answer: 4x^6y^10
Explanation:
(-2x^3)^2 x y x y^10
= 4x^3 x 2 x y^1+9
4x^6 x y^10
= 4x^6y^10

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2 years ago

How can i turn .888 into a fraction?

S_A_V [24]

You cant how many digits there are behind the decimal, 3, then ask your self which number has 3 zeroes, 1000, so after that you write 888 over 1000, simple. Hope it helped!!

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2 years ago

A freight train travels 260 km in the same time a passenger train travels 320 km. If the passenger train averages 15km/hour fast

JulsSmile [24]

Time = t

vf t = 260 
vp t = 320 
so 

260/vf = 320/(vf+15) 

320 vf = 260 vf +260(15) 
60 vf = 390 
3 vf = 39 
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

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2 years ago

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lys-0071 [83]

so the answer is.. 40

hope it is helpfull..

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2 years ago

What is the minimum value of F(x)= 10x^{2} -6x-3 3/10 or -39/10

kolezko [41]

Answer: 3/10

Step-by-step explanation:

Take the derivative of $10x^2-6x-3$ to get $20x-6$ . Set that equal to 0 to find the critical points of the function. The critical points is when the slope is either 0 or undefined.

Now do:

$20x-6=0\\20x=6\\x=\frac{6}{20} = \frac{3}{10}$

There are quite a few more steps to actually find the minimum, but for this example you can automatically assume its a minimum because it is the only critical point of the function. Ill show you these extra steps tho.

Plug in two numbers into the derivative. One that is less than 3/10 and one that is greater than 3/10. The numbers 0 and 1 are fine. When x = 0, the function is -6. When x = 1, the function is +14. A switch from negative to positive indicates a minimum value

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3 years ago