Ask question

Ask question

All categories

3 years ago

11

Joseph is shopping for school supplies. The store is selling 4 notebooks for $5. Joseph needs to buy 5 notebooks. How much will

it cost? Explain how you found your answer.

1 answer:

Slav-nsk [51]3 years ago

5 0

Answer:

It will cost $6.25

Step-by-step explanation:

You will do 5/4 and that will equal 1.25 and then you will do 1.25 x 5 = 6.21

You might be interested in

In a certain college, 33% of the math majors belong to ethnic minorities. If 7 students are selected at random from the math maj

Digiron [165]

Answer: a) 0.996, b) 0.253, c) 0.02.

Step-by-step explanation:

Since we have given that

Probability of success = Probability of the math majors belong to ethnic minorities = 33% = 0.33 =p

Probability of failure = q = 1-0.33 = 0.67

Number of students selected = 7

a) No more than 5 belong to an ethnic minority

So, using "binomial distribution", we get that

$P(X\leq 5)=\sum^5 _{x=0} ^5C_x(0.33)^x(0.67)^{5-x}=0.996$

b. Exactly three of them belong to an ethnic minority

So, it becomes,

$P(X=3)=^7C_3(0.33)^3(0.67)^4=0.253$

c. None of them belong to an ethnic minority

$P(X=0)=^7C_0(0.33)^0(0.67)^7=0.02$

Hence, a) 0.996, b) 0.253, c) 0.02.

8 0

3 years ago

2.2 • 10^6 - 4.3 • 10^5 = ?

umka21 [38]

Answer:

1.77 x 10^6

Step-by-step explanation:

2,200,000-430,000

1,770,000

7 0

4 years ago

Read 2 more answers

2. What is the slope of the graph of 4x + 5y = 10?

Temka [501]

Answer:

-0.8 or -4/5

Step-by-step explanation:

You could do this a couple of ways. If you wanted to change your equation into slope-intercept form to make it easier for you, then you can do as follows:

4x + 5y = 10

5y = -4x + 10

y = -4/5x + 2

So your slope is -4/5.

Or you could do -A/B when your equation is in standard form. A is the term in front of the x value and B is the term in front of the y. Both strategies give you -4/5 for the slope.

8 0

3 years ago

Read 2 more answers

The function p(x) is defined by p(x) = x3 - 4x2 - 9x - 36 where x E R.

skelet666 [1.2K]

Answer:

Step-by-step explanation:

Factor x3−4x2−9x−36

Cannot factor

5 0

3 years ago

Could two lines with negative slope be perpendicular? Explain.

zhannawk [14.2K]

No. For two lines to be perpendicular their slope must be the negative reciprocals of one another, mathematically:

m1*m2=-1

So if the slope of one line is negative, the line perpendicular to this must be positive by definition.

3 0

3 years ago