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3 years ago

Ivan purchased n notebooks. They were 4 dollars each. Write an equation to represent the total cost c that Ivan paid.

Mathematics

2 answers:

damaskus [11]3 years ago

4 0

Answer:

The cost of n notebooks is 4n dollars.

Step-by-step explanation:

C(n) = 4n

xenn [34]3 years ago

3 0

Answer:

4n=c

Step-by-step explanation:

your trying to figure out how how much he paid and how much money it cost total so you have to multiply the cost of one by the number of notebooks you have n and by doing that you would be able to get your total cost c

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gavmur [86]

D=-8
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3 years ago

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Two lines intersect at a point. The vertical angles formed are supplementary.

Nastasia [14]

we know that

Vertical angles are a pair of opposite and congruent angles formed by intersecting lines.

Let

x1---------> angle vertical 1

x2---------> angle vertical 2

x1=x2 ------> equation 1

in this problem

if the vertical angles formed are supplementary

that means that

x1+x2=180 ------> equation 2

substitute equation 1 in equation 2

x1+x1=180

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the answer is

The vertical angles are right angles

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Nicole received the following scores on her last 10 math assignments. 100, 88, 76, 78, 92, 94, 84, 98, 82, 90 What is the Nicole

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Step-by-step explanation:

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Enny White is shopping for CDs. She decides to purchase 3 movie soundtracks. The music store has 7 different movie soundtracks i

zubka84 [21]

Answer:

$35\ ways$

Step-by-step explanation:

we know that

Combinations are a way to calculate the total outcomes of an event where order of the outcomes does not matter.

To calculate combinations, we will use the formula

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where

n represents the total number of items

r represents the number of items being chosen at a time.

In this problem

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substitute

$C(7,3)=\frac{7!}{3!(7-3)!}\\\\C(7,3)=\frac{7!}{3!(4)!}$

simplify

$C(7,3)=\frac{(7)(6)(5)4!}{3!(4)!}$

$C(7,3)=\frac{(7)(6)(5)}{3!}$

$C(7,3)=\frac{(7)(6)(5)}{(3)(2)(1)}$

$C(7,3)=35\ ways$

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3 years ago