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3241004551 [841]

2 years ago

14

PLEASE HELP! WILL VOTE AND BRAINLIEST!

1 answer:

Nimfa-mama [501]2 years ago

5 0

1.
a)cylinder: V = π r² h
b)pyramid: <span>1/3 · [area of base] · h </span>
c)cone: (1/3)πr²h

2.
The changes in the dimensions of a cube changes its volume by 8 This essentially means that the original side length and volume is 1 cubic unit. However, when you double the side then the volume will finally be 8 cubic units. Therefore, the volume multiplies by eight.

3.
a)cylinder - Ellipse
b)cone - Circle
c)sphere - Great Circle
<span> d)square pyramid - Triangle</span>

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frez [133]

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2 years ago

4. I need help with question in the attached picture!

Arisa [49]

ANSWER

D. 13

EXPLANATION

We have

$f(x) = \frac{2x + 1}{x - 4}$

To find

${f}^{ - 1} (3)$

means we want to find an x-value whose image is 3.

$\frac{2x + 1}{x - 4} = 3$

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4 0

2 years ago

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Nicole plans to watch 3 movies each month . Write an equation to represent the total number of movies n that she will watch in m

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3 years ago

3. Solve the following application of a system of linear equations.

zhuklara [117]

Answer:

Equations:

$y = 14 + 9 x$ --- Cindy

$y = 10 x$ --- Ruben

Solution to equation:

Time they have the same amount: 14 minutes

Number of cards they have at that time: 140 flashcards

Step-by-step explanation:

Solving (a): Variables and what they represent

The variables to use are x and y

Where x represent the minutes and y represents the number of flashcards in x minutes

Solving (b): System of linear equation

Cindy:

$Existing\ Flashcards = 14$

$Additional = 9$ per minute

Total number of flashcards (y) in x minutes is:

$y = Existing\ Flashcards + Additional * x$

$y = 14 + 9 * x$

$y = 14 + 9 x$

Ruben:

$Rate = 10$ per minute

Total number of flashcards (y) in x minutes is:

$y = Rate * x$

$y = 10 * x$

$y = 10 x$

Solution to Equations:

Time they have the same amount.

To do this, we $equate$ $both$ expressions

i.e.

$10x = 14 + 9x$

Collect Like Terms

$10x - 9x = 14$

$x = 14$

Number of cards they have at that time.

Here, we simply substitute 14 for x in any of the equations.

$y = 10 x$

$y = 10 * 14$

$y = 140$

or

$y = 14 + 9 x$

$y = 14 + 9 * 14$

$y = 14 + 126$

$y = 140$

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2 years ago