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3 years ago

1. Sarah and Maya both need notebooks and pencils. The equation that represents Sarah's

Mathematics

2 answers:

STALIN [3.7K]3 years ago

8 0

Step-by-step explanation:

We have y = 13 - 3x and y = 7 - x.

=> 13 - 3x = 7 - x

=> 2x = 6, x = 3.

Then y = 7 - (3), y = 4.

Hence the price of a pencil is $3 and the price of a notebook is $4. (C)

777dan777 [17]3 years ago

5 0

answer is c) pencils: $3 notebook: $4 go to card 5

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Answer:

$Sets = 27$

Step-by-step explanation:

Given

$Coin = 1$

$Toss = 5$

Required

Number of outcomes with at most 3 heads

First, we list out the sample space of a toss of coin 5 times

$(HHHHH)$ , $(HHHHT)$ , $(HHHTT)$ , $(HHTTT)$ , $(HTTTT)$ , $(TTTTT)$ , $(TTTTH)$ , $(TTTHH)$ , $(TTHHH)$ , $(THHHH)$ , $(HTHTH)$ , $(THTHT)$ , $(HHTHH)$ , $(TTHTT)$ , $(HTTHT)$ , $(THHTH)$ , $(THHHT)$ , $(HTTTH)$ , $(THHTT)$ , $(HTTHH)$ , $(HHTTH)$ , $(TTHHT)$ , $(TTHTH)$ , $(HHTHT)$ , $(HTHTT)$ , $(THTHH)$ , $(THTTH)$ , $(HTHHT)$ , $(HTHTT)$ , $(THTHH)$ , $(HHHTH)$ , $(TTTHT)$

Next, we list out all outcomes with at most 3 heads

, , $(HHHTT)$ , $(HHTTT)$ , $(HTTTT)$ , $(TTTTT)$ , $(TTTTH)$ , $(TTTHH)$ , $(TTHHH)$ , , $(HTHTH)$ , $(THTHT)$ , , $(TTHTT)$ , $(HTTHT)$ , $(THHTH)$ , $(THHHT)$ , $(HTTTH)$ , $(THHTT)$ , $(HTTHH)$ , $(HHTTH)$ , $(TTHHT)$ , $(TTHTH)$ , $(HHTHT)$ , $(HTHTT)$ , $(THTHH)$ , $(THTTH)$ , $(HTHHT)$ , $(HTHTT)$ , $(THTHH)$ , $(TTTHT)$

So, the number of set is:

$Sets = 27$

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