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3 years ago

+(−)= what is the Property

Mathematics

2 answers:

qaws [65]3 years ago

8 0

A positive × A negative = Negative

A positive × A positive = Positve

A negative × A negative = Positive

aleksklad [387]3 years ago

6 0

Answer: additive property of equality and subtraction property of equality

Step-by-step explanation:

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A book costs $3. Mr. Grayson spent $81 on books. The number of books, b, can be found by solving the equation 3b = 81. Which is

Andre45 [30]

Answer:

Using division equality property to solve for b. b=27

Step-by-step explanation:

A book cost $3

Mr. Grayson spent $81 on books

Let number of books be b

Total cost invest on book = 3b

This would be equal to $81

Therefore, 3b=81

Now we solve for b

Using division method of equality

If we divide both side by same number in equality.After division we get both are equal .

3b=81

Here we divide by 3 both sides

3b÷3=81÷3

b=27

Thus, Using division equality property to solve for b. b=27

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3 years ago

Read 2 more answers

6 glasses of orange juice has 360 calories what is the unit rate calories per glass?

lisabon 2012 [21]

Answer:

Step-by-step explanation:

in order to find the answer you have to divide 360 by 6 . each glass will end up having 60 calories

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3 years ago

Use the equation below to find y, if m=7, x=6, and b=2.<br> y=mx+b

Dahasolnce [82]

Answer:

y=44

Step-by-step explanation:

y=mx+b you do substition and replace m with 7 and b with 2 and x with 6

y=7*6+2

the solve with system of order 7 times 6 which is 42 then add the 2 and then you get 44

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2 years ago

Pleeeeaaassssee heeeeellllllpppp faaasst brainliest if 2 PPL ANSWER!!!

aliya0001 [1]

I beliee the answer is C

7 0

3 years ago

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An eyewitness observes a hit-and-run accident in New York City, where 95% of the cabs are yellow and 5% are blue. A police exper

Liula [17]

Answer:

0.1739 = 17.39% probability that the cab actually was blue

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Witness asserts the cab is blue.

Event B: The cab is blue.

Probability of a witness assessing that a cab is blue.

20% of 95%(yellow cab, witness assesses it is blue).

80% of 5%(blue cab, witness assesses it is blue). So

$P(A) = 0.2*0.95 + 0.8*0.05 = 0.23$

Probability of being blue and the witness assessing that it is blue.

80% of 5%. So

$P(A \cap B) = 0.8*0.05 = 0.04$

What is the probability that the cab actually was blue?

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.04}{0.23} = 0.1739$

0.1739 = 17.39% probability that the cab actually was blue

7 0

3 years ago