A school band sold 30 raffle tickets, each labeled with a number from 1 to 30. One winning ticket will be drawn.What is the probability that the number of the winning ticket will be a multiple of 4 or the number 19? Express your answer in simplest form.

Answers

Answer 1

Answer: 4/15 hope i helped!!!!!!!!

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What value of k solves the equation?

k-4=1/256

Answers

$k-4=(1)/(256)\ \ \ \ \ \ \ \ \ \ |add\ 4\n\nk=(1)/(256)+4\n\nk=(1)/(256)+(1024)/(256)\n\nk=(1025)/(256)=4(1)/(256)$

k-4=1/256
add 4 to both sides
k=4+1/256

k=4 and 1/256

The books in a private library are classified as fiction and nonfiction. There are 400 books in the library. There are 40 more fiction books than nonfiction books. Audrey randomly picks a book. A few minutes later, Ryan randomly picks one of the remaining books. What is the probability that both pick nonfiction books?

Answers

We must first solve the number of fiction and nonfiction books
if x is the number of fiction books and
y is the number of nonfinction books

Then,
x + y = 400
x = y + 40

Solving the system of equations:
x = 220
y = 180

Therefore, the probability that Audrey and Ryan will get both nonfiction books is
P = 180/400 + 179/399
P = 0.8986

Answer: The probability is P = 0.20

Step-by-step explanation:

The data that we have is:

Total books = 400

If the number of non fiction books is Nf and the number of fiction books is F, we have that:

F = Nf + 40

So here we have a system of equations:

Nf + F = 400

F = Nf + 40

we can replace the second equation in the first one, and solve it for Nf.

Nf + (Nf + 40) = 400

2*Nf + 40 = 400

2*Nf = 400 - 40 = 360

Nf = 180

So we have 180 non-fiction books.

We want to calculate the probability of picking at random two non-fiction books.

When Audrey picks one, the probabilty is equal to the number of non-fiction books divided the total number of books:

p1 = 180/400

for Ryan we have the same, but the number of books is 399 now (Because Audrey already took one), and the number of non-fiction books is 179.

p2 = 179/399

The probabiliy for both events to happen is:

P = p1*p2 = (180/400)*(179*399) = 0.20

I really need help with a thing for math if yall can help I would appreciate it. If yall know this comment down below and tell me the answer

Answers

Answer:

Step-by-step explanation:

3/5of 45 is basically what you are looking for and it in itself is the equation you have to solve

3/5 is 3 divided by and "of" is basically multiply by 45

3/5*45

.6*45

Find a • b.

a = 4i + 3j, b = -4i + 4j

Answers

The required dotproduct of the given vector is given as -4.

Given that,
a = 4i + 3j, b = -4i + 4j
a • b is to be determined.

What is dot products of vector?

The dot × of twovectors is described as the sum of the products of the relevant directionalvector.

Here,
a.b = (4i + 3j).(-4i + 4j)
a.b = 4×-4 (i.i) + 3×4 (j.j) + 4×4 (i.j) + 3×-4(i.j)
a.b = -16 + 12
a.b = -4 (since i.j or j.i for dot product gives zero.)

Thus, the required dotproduct of the given vector is given as -4.

Learn more about dot product here:
brainly.com/question/29097076
#SPJ2

Hello,

I suppose a and b are vectors
and i and j unit's vectors

$\vec{i}*\vec{i}=1\n \vec{j}*\vec{j}=1\n \vec{i}*\vec{j}=0\n$
$\vec{a}\ .\ \vec{b}=(4\vec{i}\ +3 \vec{j}).(-4\vec{i}\ +4 \vec{j})\n =-16-3*4*0+4*4*0+12=-4$

Haddle wrote a check to the grocery store for $156.00. However, when she looks at her check register later that night, she sees she only has$122.66 In her checking account. Haddle has opted in to the standard overdraft practices at her bank. How many fees is Haddle likely to pay for

writing the check?