All categories

3 years ago

Suffocating with homework, comment a star if you can assist with four algebra homework questions. Twenty points.

Mathematics

1 answer:

natita [175]3 years ago

8 0

What do you need help with? Will do my best.

You might be interested in

I need help please!!!

PSYCHO15rus [73]

Answer:

Step-by-step explanation:

7 0

2 years ago

The marked price of an article is 25% above the selling price and the cost price is 20% below the selling price. Find the rate o

MAXImum [283]

Step-by-step explanation:

The marked price of an article is 25% above the SP and the CP is 20% below the selling price. What is the rate of discount and the profit percentage?

Let C, M & S denote cost-price, marked-price & sell-price respectively of the article.

Hence from above data we get following relations,

M = (1 + 25/100)*S = 1.25*S ….. (1a)

C = (1 - 20/100)*S = 0.80*S ….. (1b)

From (1a) we get,

S = (100/125)*M = (4/5)*M

or S = (1 - 1/5)*M = (1 - 20/100)*M ….. (2a)

From (1b) we get,

S = (100/80)*C = (5/4)*M

or S = (1 + 1/4)*C = (1 + 25/100)*C ….. (2b)

Therefore

It is evident from (2a) that

the discount percentage = 20% [Ans]

It is evident from (2b) that

the profit percentage = 25% [Ans]

7 0

3 years ago

David collected random samples of data on the number of people who eat at restaurants daily. He created two dot plots to represe

Aloiza [94]

Answer:

look below

Step-by-step explanation:

The mean of Restaurant A is 17.3

The mean of Restaurant B is 15.8

The median of Restaurant A is 18

The median of Restaurant B is 15

The mode of Restaurant A is 18

The mode of Restaurant B is 15

The range of Restaurant A and B is 10

The line plots are the same because they have the same range

The line plots are different because they have different means, medians, and modes.

7 0

2 years ago

Find the solution for 5x-7y=17 and 9x-7y=-11

ad-work [718]

Step-by-step explanation:

Refer to attachment.

Hope it helps.

8 0

3 years ago

An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at le

hoa [83]

Answer:

0.999

Step-by-step explanation:

At least 1 correct means, 1 correct, 2 correct, 3 correct ... until 10 correct. That would be a long process to calculate.

Instead we use the complement rule to calculate.

$P(x\geq1)=1-P(x$

So we need to find P(x<1). So this is getting 0 answers correct, or 10 incorrect.

In true false question, probablity of correct is 1/2 and incorrect is 1/2, hence,

Probability of 10 incorrect is (1/2)^10

Thus,

$P(x\geq1)=1-(\frac{1}{2})^{10}=0.999$

So the answer is 0.999 (rounded to nearest thousandth)

3 0

3 years ago