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3 years ago

An item sells for $40. The sales tax on

Mathematics

1 answer:

AlladinOne [14]3 years ago

4 0

Answer:

sales tax is $3.2 ans total is $43.2

Step-by-step explanation:

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Question 5 (Essay Worth 5 points) Jessica purchased a DVD that was on sale for 12% off. The sales tax in her county is 3%. Let y

Vlad [161]

Answer:

<em>The expression for final cost of the DVD is $0.9064y$ </em>

Step-by-step explanation:

Jessica purchased a DVD that was on sale for 12% off.

If the original price of the DVD is $y$ , then the amount of discount on sale will be: $0.12y$

So, the selling price of the DVD $= (y-0.12y)= 0.88y$

The sales tax in her county is 3%. So, the amount of sales tax on the selling price will be: $(0.88y\times 0.03)= 0.0264y$

Thus, the expression for final cost of the DVD is: $(0.88y+0.0264y)= 0.9064y$

4 0

3 years ago

Janie flips a coin 70 times and records if it comes up heads. If getting heads is a success, what is the probability of a failur

lisov135 [29]

i believe the answer is 1/70

3 0

2 years ago

1.32:3 1/7 =(1.4y): 5/6

alina1380 [7]

After solving $1.32:3 \frac{1}{7}=(1.4y):\frac{5}{6}$ we get y=0.24

Step-by-step explanation:

We need to solve the ratio: $1.32:3 \frac{1}{7}=(1.4y):\frac{5}{6}$ and find value of y

Solving:

$1.32:3 \frac{1}{7}=(1.4y):\frac{5}{6}$

Converting fractions into decimals

$1.32:3.14=(1.4y):0.83$

Ratio can be written as:

$\frac{1.32}{3.14}=\frac{1.4y}{0.83}$

Now cross multiply

$1.32*0.83=1.4y*3.14$

$1.09=4.39y$

$y=\frac{1.09}{4.39}$

$y=0.24$

So, after solving $1.32:3 \frac{1}{7}=(1.4y):\frac{5}{6}$ we get y=0.24

Keywords: Ratio

Learn more about Ratios at:

#learnwithBrainly

6 0

2 years ago

Scientists found that a certain particle of dust doubles every 30 minutes. If the scientists tests this out with 21 grams of the

monitta

Answer: $1.663\times 10^{30}\ gm$

Step-by-step explanation:

Given

Population of dust particle doubles every 30 minutes

If the initial sample is 21 grams

The model to predict the population will be

$\Rightarrow P=21\cdot 2^{2t}$

Where t=time in hours

A day has 24 hours . So, for 2 days time is 48 hours

Population is given by

$\Rightarrow P=21\cdot 2^{2\times 48}\\\\\Rightarrow P=21\times 2^{96}\\\\\Rightarrow P=1.663\times 10^{30}\ gm$

7 0

2 years ago

How can you rewrite P(z £ –1.75) in order to find the answer? P(z £ 1.75) P(z ³ -1.75) 1 - P(z £ -1.75) 1 - P(z £ 1.75)

Fudgin [204]

To rewrite it the answer is 1-P(z 1.75) D

5 0

3 years ago

Read 2 more answers