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2 years ago

Are these expressions equivalent?(-2.6) + (-2.9) + (-7.1) and – (2.6+2.9+7.1) Why or why not?

Mathematics

2 answers:

Vilka [71]2 years ago

7 0

Answer:

Yes

Step-by-step expiation:

Negative plus negative equals a positive but you add the negative to a positive the number becomes a negative. and the other side everything is

positive in parentheses followed by a negative so they are equal.

Alika [10]2 years ago

7 0

yes, that is an examle o the distributive proeprty

i we take the 2nd phrase

-(2.6+2.9+7.1)=-1(2.6+2.9+7.1)=-1(2.6)-1(2.9)-1(7.1)=-(2.6)-(2.9)-(7.1)=(-2.6)+(-2.9)+(-7.1)

yes because of distributive property

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A bag contains Red, Green and Yellow balls. A ball is taken at random from the bag. The probability that it is Red is 0.35 and t

Eddi Din [679]

Answer:

P(Yellow)=0.25
P(Not Red)=0.65

Step-by-step explanation:

P(Red)=0.35

P(Green)=0.4

(a)Since there are three colours inside the bag

P(Red)+P(Green)+P(Yellow)=1

0.35+0.4+P(Yellow)=1

P(Yellow)=1-(0.35+0.4)

P(Yellow)=0.25

(b) In probability, the sum of an event and its complement is 1.

Therefore:

P(Red)+P(Not Red)=1

0.35+P(Not Red)=1

P(Not Red)=1-0.35

P(Not Red)=0.65

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2 years ago

Sales prices of baseball cards from the 1960s are known topossess a skewed-right distribution with a mean sale price of $5.25and

Serga [27]

Answer:

c. Skewed-right with a mean of $5.25 and a standard error of$0.28

Step-by-step explanation:

As we have given that Sales prices of baseball cards have a right-skewed distribution with a mean $5.25 and a standard deviation is $2.80.

Now, We know that if standard deviation = σ

then, standard error = $\frac{\sigma}{\sqrt{n}}$

As, we have standard deviation = $2.80

then standard error will be $\frac{2.80}{\sqrt{100}}$

⇒ Standard error = $0.28

Hence, Option (c) is the correct option.

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2 years ago

Whats the gcf of 32 and 52

Molodets [167]

The greatest common factor of 32 and 52 is: 4

Factors of 32: 1, 2, 4, 8, 16, 32
Factors of 52: 1, 2, 4, 13, 26

The common factors between them are 1, 2, 4, but the greatest common factor between them is 4.

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2 years ago

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