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3 years ago

Please help meeeeeeeee↖(^ω^)↗

Mathematics

1 answer:

denpristay [2]3 years ago

7 0

36!! I hope this helps!!♥️

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At the coffee shop, two coffees and one latte cost $10.50. Three coffees and two lattes cost $17.00. What is the cost of one cof

EastWind [94]

To solve this problem, we can set two equations.

Let x be the cost of coffee and y be the cost of latte.

Two coffees and one latte: 2x + y = 10.50

y=10.50 - 2x ...(1)

Three coffees and two lattes: 3x + 2y = 17.00...(2)

Put (1) into (2), we have:

3x + 2(10.50-2x) = 17.00

3x + 2(10.50) - 2(2x) = 17.00

3x + 21 - 4x = 17

Put the unknown to one side:

3x -4x = 17 - 21

-x = -4

When there are negative numbers on both sides, we can take the negative signs away:

x= 4

Therefore, cost of one coffee is A. $4.00.

Hope ot helps!

3 0

4 years ago

Which of the following is an example of a statistic? a.) A value used to represent a population b.) Standard deviation of all fi

natita [175]

Answer:

Step-by-step explanation:

statistic is a number that represents as numerical data

. An example of statistics is a report of numbers saying how many followers of each religion there are in a particular country.

6 0

3 years ago

Izzy is Iago's little sister. She is counting her coins. Izzy finds that she has three more quarters ($0.25) than she has dimes

Hunter-Best [27]

26 quarters
6 dimes
1 penny

6 0

4 years ago

Keisha has 144 stickers. Of all her stickers,7/9 are animal stickers, and 1/8 of these animal stickers show dolphins. How many d

Alisiya [41]

Answer:

Step-by-step explanation:

7/9 of 144 = 112 stickers are animal stickers

1/8 of 144 = 14 stickers are dolphin stickers

_____

"of" in this context means "times".

3 0

3 years ago

Read 2 more answers

4. Suppose P(A) = 0.48 and P(B) = 0.62. a. Can A and B be mutually exclusive? Why or why not. b. If A and B are independent, the

kenny6666 [7]

Answer:

Step-by-step explanation:

a) Two events A,B are said to be mutually exlusive if any of the following occurs.

- A and B have an empty intersection

- A= B^c and their union is the whole sample space

- P(A intersection B) =0

REcall the following formula

$P(A\cupB ) = P(A)+P(B)-P(A\cap B)$

Note that P(A) + P(B) = 1.1. Since the probability is always a number between 0 and 1, it must happen that $P(A\cap B) >0$ , otherwise, $A\cup B$ would have a probability greater than 1. Hence, A, B are not mutually exclusive.

b) by definition, if two events are indepent, we have that the probability of the intersection is equal to products of their probabilites. Or

$P(A\cap B) = P(A)P(B)$

c) Recall that if we have mutuallly exclusive events A, B, then we have that $P(A\cap B)=0$ , if they were independent, we would have the following

$P(A) P(B) =0$

which necesarilly implies that at least one of the two events has 0 probability. (THis is not the case)

7 0

4 years ago