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3 years ago

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A) The lowest score was in third period. B) The highest score was in first period. Eliminate C) On average, first period did bet

ter than third period. D) There is not enough information to know if any of these is true.

1 answer:

Reptile [31]3 years ago

5 0

Whats the question tho....

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Tyler baked 702 cookies. He sold them in boxes of 18. After selling all the boxes of cookies for the same amount each, he earned

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Tyler made $3.50 for each box of cookies

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An arithmetic sequence has this recursive formula.

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Answer: an=8+(n-1)(-6) .

Step-by-step explanation:

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3 years ago

Z^5=-243i, find the solution to the equation whose argument is strictly between 180 degrees and 270 degrees. Round your answer t

11Alexandr11 [23.1K]

Answer:

The solution is $z = -2.853 - i 0.927$ .

Step-by-step explanation:

Complex power is determined by means of the De Moivre's Theorem, whose expression is:

$z^{n} = r^{n} \cdot (\cos n\theta + i \sin n\theta)$

Where $r$ is the norm of the complex number. In this case, expression can be written as:

$-i 243 = 3^{5} \cdot (\cos 5\theta + i \sin 5\theta)$

The real component must be equal to zero and complex component must be equal to -1. That is to say:

$\cos 5\theta = 0$

$\sin 5\theta = -1$

Possible solutions for each component are, respectively:

Real component

$5\theta = \cos^{-1}0$

$5\theta = \frac{\pi}{2} \pm \pi\cdot j$ , $\forall j \in \mathbb{N}_{O}$

$\theta = \frac{\pi}{10} \pm \frac{\pi}{5} \cdot j$ , $\forall j \in \mathbb{N}_{O}$

Possible solutions: $\frac{11\pi}{10}$ , $\frac{13\pi}{10}$ , $\frac{3\pi}{2}$

Complex component

$5\theta = \sin^{-1}(-1)$

$5\theta = \frac{3\pi}{2} \pm 2\pi \cdot j$ , $\forall j \in \mathbb{N}_{O}$

$\theta = \frac{3\pi}{10} \pm \frac{2\pi}{5} \cdot j$ , $\forall j \in \mathbb{N}_{O}$

Possible solutions: $\frac{11\pi}{10}$ , $\frac{3\pi}{2}$

There is one solution whose argument is strictly between 180 degrees ( $\pi$ ) and 270 degrees ( $1.5\pi$ ).

$z = 3 \cdot \left( \cos \frac{11\pi}{10} + i \sin \frac{11\pi}{10} \right)$

$z = -2.853 - i 0.927$

6 0

3 years ago

Dont answer this PLEAS

pickupchik [31]

Answer:

why? also the answer is 1.6y+y-4/15y+7/6y=21/3

We move all terms to the left:

1.6y+y-4/15y+7/6y-(21/3)=0

Domain of the equation: 15y!=0

y!=0/15

y!=0

y∈R

Domain of the equation: 6y!=0

y!=0/6

y!=0

y∈R

We add all the numbers together, and all the variables

1.6y+y-4/15y+7/6y-7=0

We add all the numbers together, and all the variables

2.6y-4/15y+7/6y-7=0

We calculate fractions

2.6y+(-24y)/90y^2+105y/90y^2-7=0

We multiply all the terms by the denominator

(2.6y)*90y^2+(-24y)+105y-7*90y^2=0

We add all the numbers together, and all the variables

(+2.6y)*90y^2+(-24y)+105y-7*90y^2=0

We add all the numbers together, and all the variables

105y+(+2.6y)*90y^2+(-24y)-7*90y^2=0

Wy multiply elements

-630y^2+105y+(+2.6y)*90y^2+(-24y)=0

We get rid of parentheses

-630y^2+105y+(+2.6y)*90y^2-24y=0

We add all the numbers together, and all the variables

-630y^2+81y+(+2.6y)*90y^2=0

Step-by-step explanation:

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3 years ago

Alice is shopping for cheese. She notices that the cheddar and brie have the same volume, even though their shapes are different

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The correct answer is B: 4 cm

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3 years ago

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