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2 years ago

Simplify 4(2n -1) – 6n

Mathematics

2 answers:

Zolol [24]2 years ago

5 0

Answer:

2n-4

Step-by-step explanation:

larisa86 [58]2 years ago

4 0

Answer:

2n - 4

Step-by-step explanation:

expand brackets

8n - 4 - 6n

collect like terms

2n - 4

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Step-by-step explanation: I'm worried for you, I hope this is correct.

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2 years ago

PLEASE HELP ME!!! I NEED HELP FOR PART C

WINSTONCH [101]

Answer:

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Step-by-step explanation:

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2 years ago

Evaluate the expression when =c3 and =x−2 . −c4x

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3 years ago

a rectangle has a length of 8ft and a width of 6ft. if its length and width increase by 50% each, what is the area of the new re

Nadya [2.5K]

Answer:

108 ft²

Step-by-step explanation:

Increasing by 50% means multiplying the original quantities by 1.5, that is

100% + 50% = 150% = 1.5 ( 100% is the original dimensions ), thus

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2 years ago

What are the roots of x in -10x2 + 12x − 9 = 0?

hoa [83]

Answer:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

Step-by-step explanation:

Use the Quadratic formula:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

You can identify that, in this case:

$a=-10\\b=12\\c=-9$

Now you need to substitute these values into the formula:

$x=\frac{-12\±\sqrt{12^2-4(-10)(-9)}}{2(-10)}$

$x=\frac{-12\±\sqrt{-216}}{-20}$

Remember that:

$i=\sqrt{-1}$

Therefore,rewriting and simplifying, you get:

$x=\frac{-12\±6i\sqrt{6}}{-20}$

$x=\frac{-6(2\±i\sqrt{6})}{-2(10)}$

$x=\frac{3(2\±i\sqrt{6})}{10}$

Then, you get the following roots:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

6 0

2 years ago

Read 2 more answers