14x − 2y = 46

1 answer:

7 0

From the second we can find:

y=7x-23

Now using this value of y in the first equation you have:

14x-2(7x-23)=46

14x-14x-46=46 which is always true meaning that there are infinitely many solutions.

Basically both equations describe the same line so every point on the line is a solution...

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Hi, I am new to this website :) I'm currently taking an online trig class on De Moivre's theorem and I don't understand it at al

Vladimir [108]

De Moivre's theorem uses this general formula z = r(cos α + i sin α) that is where we can have the form a + bi. If the given is raised to a certain number, then the r is raised to the same number while the angles are being multiplied by that number.

For 1) [3cos(27))+isin(27)]^5 we first apply the concept I mentioned above where it becomes

[3^5cos(27*5))+isin(27*5)] and then after simplifying we get, [243 (cos (135) + isin (135))]

it is then further simplified to 243 (-1/ √2) + 243i (1/√2) = -243/√2 + 243/√2 i
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For 2) [2(cos(40))+isin(40)]^6, we apply the same steps in 1)

[2^6(cos(40*6))+isin(40*6)],

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And the answer is -32 -32 √3 i

Summary:
1) -243/√2 + 243/√2 i
2)-32 -32 √3 i

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The ratio of the width to the height of a window is 2:7. The width of the window is 3ft. Write and solve a proportion to find th

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10.5 -- 3/2=1.5 -- 7x1.5=10.5

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Suppose that a population parameter is 0.3, and many samples are taken from the population. As the size of each sample increases

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Answer: C. 0.3

Step-by-step explanation:

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3 years ago

Make n the subject of the formula

kogti [31]

Answer:

$\mathsf{ \frac{m + 21}{5} = n }$

Step-by-step explanation:

To make "n" the subject of the formula, rearrange the formula so it begins with " n = "

To isolate the variable "n", you need to inverse the other terms on that side of the equation where "n" really is.

=> m = 5n - 21

there's a "-21" next to "5n", inverse of subtraction is addition, so add 21 on both sides of the equation.

=> m + 21 = 5n - 21 + 21

=> m+ 21 = 5n

There's also a 5 attached to n, that means the multiplication of n with 5, the inverse of multiplication is division, so dividing both sides of the equation by 5

$\mathsf{ \frac{m + 21}{5} = n }$

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3 years ago

Can someone helps me with these 2 questions?

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4 years ago

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