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Leto [7]
3 years ago
9

javier buys 3 postcards during each day of vacation. how many days will javier have to spend on vacation before he will have bou

ght a total of 18 postcards?
Mathematics
1 answer:
storchak [24]3 years ago
4 0
Answer: 6 days
explanation: 18/3=6
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7n - 4 = 31. what is the value of the n​
Gelneren [198K]

Answer:

n = 5

Step-by-step explanation:

- Move all terms not containing  n  to the right side of the equation.

7n = 31 + 4

7n = 35

- Divide each term by  7  and simplify.

n = 5

i hope this helps :)

4 0
3 years ago
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Brianna went shopping at Forever 21 and spent a total of $68. Her purchase included a pair of jeans at $32 and t-shirts for $12
Blizzard [7]

Answer:

68 = 12t + 32

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3 years ago
Explain how you know which terms to combine<br> when combining like terms.
joja [24]

Answer:

See like terms have the same variables

E.g 2x+4y-x+7y

We should take the same variable together with the same signs so here

2x-x will be 1x

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So x+11y

Hope it helps!

8 0
3 years ago
In the game of blackjack played with one​ deck, a player is initially dealt 2 different cards from the 52 different cards in the
Volgvan

Answer:

P =4.83\%

Step-by-step explanation:

First we calculate the number of possible ways to select 2 cards an ace and a card of 10 points.

There are 4 ace in the deck

There are 16 cards of 10 points in the deck

To make this calculation we use the formula of combinations

nCr=\frac{n!}{r!(n-r)!}

Where n is the total number of letters and r are chosen from them

The number of ways to choose 1 As is:

4C1 = 4

The number of ways to choose a 10-point letter is:

16C1 = 16

Therefore, the number of ways to choose an Ace and a 10-point card is:

4C1 * 16C1 = 4 * 16 = 64

Now the number of ways to choose any 2 cards from a deck of 52 cards is:

52C2 =\frac{52!}{2!(52-2)!}

52C2 = 1326

Therefore, the probability of obtaining an "blackjack" is:

P = \frac{4C1 * 16C1}{52C2}

P = \frac{64}{1326}

P = \frac{32}{663}

P =0.0483

P =4.83\%

4 0
3 years ago
Read 2 more answers
Question 2 Write the following as an algebraic expression y increased by 4
nata0808 [166]

We need to write the given statement in math terms:

y increased by 4

Recall that increased means that we are adding 4 to the previous number.

Then the mathematical expression is:

y + 4

The quantity y has been increased by 4 units.

5 0
1 year ago
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