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2 years ago

12

Anthony decided to buy two DVDs that were not included in the deal. His price after tax was $21.60. What was the cost of the two

DVDs before the sales tax was added?

1 answer:

dimulka [17.4K]2 years ago

8 0

What was the Price before

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Xander rolls two 6-sided number cubes. What is the theoretical probability of rolling an even number on the first cube and a num

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1/6

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3 years ago

What is the sum of the measures of <A and <B?

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145

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Because that angle(C) is sum of the A & B. ✌️

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Which transformation(s) can be used to map one triangle onto the other? select two options. reflection only translation only dil

exis [7]

Transformation which can be used for mapping of one triangle to another are;

Only translation
Rotation then dilation.

What does mapping mean in geometry?

Any method that is outlined for assigning a specific object from one (or the same) set to each object in another is known as mapping.
Any set, including all whole integers, all the points on a line, or all the objects inside a circle, can be mapped.

We need to map one triangle to another ;

Hence, for mapping of one triangle to another,

The transformation which can be used from the given options are;

Only translation
Rotation then dilation

Learn more about mapping

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2 years ago

Becky spent h hours studying

Otrada [13]

Answer:

6.5 = <em>h</em> + 2

<em>h</em> = 4.5

Step-by-step explanation:

We are given <em>h</em> and since she did 2 additional hours of work, we add the 2 hours. and since we are trying to find <em>h</em>, we set the equation equal to 6.5

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2 years ago

Find the angle between the given vectors. Round your answer, in degrees, to two decimal places. u=⟨2,−6⟩u=⟨2,−6⟩, v=⟨4,−7⟩

NISA [10]

Answer:

$\theta = 108.29$

Step-by-step explanation:

Given

$u =$

$v =$

Required:

Calculate the angle between u and v

The angle $\theta$ is calculated as thus:

$cos\theta = \frac{u.v}{|u|.|v|}$

For a vector

$A =$

$A = a * b$

$cos\theta = \frac{u.v}{|u|.|v|}$ becomes

$cos\theta = \frac{.}{|u|.|v|}$

$cos\theta = \frac{2*6+4*-7}{|u|.|v|}$

$cos\theta = \frac{12-28}{|u|.|v|}$

$cos\theta = \frac{-16}{|u|.|v|}$

For a vector

$A =$

$|A| = \sqrt{a^2 + b^2}$

So;

$|u| = \sqrt{2^2 + 6^2}$

$|u| = \sqrt{4 + 36}$

$|u| = \sqrt{40}$

$|v| = \sqrt{4^2+(-7)^2}$

$|v| = \sqrt{16+49}$

$|v| = \sqrt{65}$

So:

$cos\theta = \frac{-16}{|u|.|v|}$

$cos\theta = \frac{-16}{\sqrt{40}*\sqrt{65}}$

$cos\theta = \frac{-16}{\sqrt{2600}}$

$cos\theta = \frac{-16}{\sqrt{100*26}}$

$cos\theta = \frac{-16}{10\sqrt{26}}$

$cos\theta = \frac{-8}{5\sqrt{26}}$

Take arccos of both sides

$\theta = cos^{-1}(\frac{-8}{5\sqrt{26}})$

$\theta = cos^{-1}(\frac{-8}{5 * 5.0990})$

$\theta = cos^{-1}(\frac{-8}{25.495})$

$\theta = cos^{-1}(-0.31378701706)$

$\theta = 108.288386087$

<em></em> $\theta = 108.29$ <em> (approximated)</em>

4 0

2 years ago