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2 years ago

Evaluate the following expression: -1(5,-1) + 2(1,1). A. (5,-2) B. (-3,3) C. (7,1) D. (-5,2)

Mathematics

2 answers:

Gre4nikov [31]2 years ago

8 0

I believe that the answer should be B

myrzilka [38]2 years ago

6 0

$-1[5;\ -1]+2[1,\ 1]=[(-1)(5);\ (-1)(-1)]+[(2)(1);\ (2)(1)]=[-5;\ 1]+[2;\ 2]\\\\=[-5+2;\ 1+2]=[-3;\ 3]$
Answer: B

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The price the school district pays for each typewriter is $106.56.

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A quantity discount is the discount given for bulk purchases. It reduces the purchase price of a good or service.

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1 year ago

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ArbitrLikvidat [17]

Answer:

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Step-by-step explanation:

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2 years ago

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2 years ago

Which Graph correctly solves the equation below? -1/2x^2 +2 = 2x^2 -8

lubasha [3.4K]

Answer:

see attachment

Step-by-step explanation:

The given equation is

$- \frac{1}{2} {x}^{2} + 2 = 2 {x}^{2} - 8$

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$y = - \frac{1}{2}{x}^{2} + 2$

This quadratic graph has its vertex at (0,2) and turns upside down.

The right hand side of the equation is

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This quadratic graph opens upwards and has its vertex at (0,-8).

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3 years ago

Find the surface area. Round your answer to the nearest hundredth

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Step-by-step explanation:

From the given picture, the radius of the base of the cylinder = 5.5 ft.

The height of the cylinder = 5 ft.+6 ft.=11 ft.

We know that the surface area of a cylinder is given by :-

$\text{Surface Area}=2\pi r (r+h)\\\\\Rightarrow\text{Surface Area}=2(3.14)(5.5)(5.5+11)\\\\\Rightarrow\text{Surface Area}=569.91\ ft^2$

Hence, the surface area of the given cylinder = $569.91\ ft^2$

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3 years ago

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