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3 years ago

Ajar contains 6 pennies, 14 nickels, 16 dimes and 4 quarters. If one coin is

Mathematics

2 answers:

Romashka [77]3 years ago

7 0

P(nickle or dime) = 3/4

Marianna [84]3 years ago

6 0

Answer:

P(nickel or dime) = 3/4

Step-by-step explanation:

First, find the total amount of coins that there are:

6 + 14 + 16 + 4 = (20) + (20) = 40

You are trying to find P(nickel or dime). Note that there are 14 nickels, and 16 dimes. Add these two numbers together:

P(Nickel or dime) = (14 + 16)/40

P(Nickel or dime) = (30)/40

Simplify. Divide common factors from both the numerator & denominator (10)

P(Nickel or dime) = (30/40)/(10/10) = 3/4

P(nickel or dime) = 3/4

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3 years ago

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4 years ago

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3 years ago

Your friend incorrectly says the solution to the equation 11.2y - 7.4y=141.36 is y=7.6 what error did your friend make? A) Divid

krek1111 [17]

The correct answer is: D) Subtracted like terms incorrectly

Step-by-step explanation:

Given

$11.2y - 7.4y=141.36$

The terms 11.2y-7.4y need to be subtracted. But option b is to add them. We will add them and then solve the equation to see if its right.

So adding 11.2y-7.4y

$18.6y=141.36$

Dividing both sides by 18.6

$\frac{18.6y}{18.6}=\frac{141.36}{18.6}\\y=7.6$

so by adding the terms instead of subtracting we get y=7.6.

this means that the error was adding 7.4y-11.2y instead of subtracting

The correct method will be:

$11.2y - 7.4y=141.36\\3.8y=141.36$

Dividing both sides by 3.8

$\frac{3.8y}{3.8}=\frac{141.36}{3.8}\\y=37.2$

Hence,

The correct answer is: D) Subtracted like terms incorrectly

Keywords: Linear equation, Expression

Learn more about linear expressions at:

#LearnwithBrainly

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