All categories

3 years ago

HELP PLEASE QUICKLY ASAP! You will be rewarded with 20 points! Please help!

Mathematics

1 answer:

Mashcka [7]3 years ago

4 0

^^ Read what they said, They are correct!!

You might be interested in

Points A (3,8) and B (-4,8 are located on a cooridinate plane. Find the distance between them.

aleksandrvk [35]

-4 + 3 = 7
8=8
(7,0) = DISTANCE BETWEEN THEM

7 0

3 years ago

If 15 books cost $90, what is the unit price?

Radda [10]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

An item costs $410 before tax, and the sales tax is $20.50 . find the sales tax rate. write your answer as a percentage.

Blababa [14]

Hi there! For this, we can simply divide 20.50 by 410 to find the tax rate. 20.50/410 is 0.05. That's in decimal form. Multiply by 100 to get the percent form. 0.05 * 100 is 5. That's the number in percent form. The sales tax rate is 5%.

6 0

3 years ago

Read 2 more answers

What is the equation of a line that passes through the point (1, 8) and is perpendicular to the line whose equation is y=x/2+3 ?

Svet_ta [14]

<u>Answer</u>

y = -2x + 10

<u>Explanation</u>

The general equation for a straight line is y = mx + c where m and c are gradient and y-intercept respectively.

y=x/2+3 = y (1/2)x + 3

gradient = 1/2

Gradient of the line perpendicular to y=x/2+3 is;

m × 1/2 = -1

m = -2

Now we find the equation of a line passing through (1,8) and have a gradient of -2.

-2 = (y - 8)/(x - 1)

-2(x - 1) = (y - 8)

2 -2x = y - 8

y = -2x + 10

3 0

3 years ago

Of the 2,598,960 different five-card hands possible from a deck of 52 playing cards, how many would contain all black cards.

kumpel [21]

Answer: 65,780

Step-by-step explanation:

When we select r things from n things , we use combinations and the number of ways to select r things = $^nC_r=\dfrac{n!}{(n-r)!r!}$

Given : The total number of playing cards in a deck = 52

The number of different five-card hands possible from a deck = 2,598,960

In a deck , there are 26 black cards and 26 red cards.

The number of ways to select 5 cards from 26 cards = $^{26}C_{5}=\dfrac{26!}{(26-5)!5!}$

$=\dfrac{26\times25\times24\times23\times22\times21!}{21!(120)}=65780$

Hence, the number of different five-card hands possible from a deck of 52 playing cards such that all are black cards = 65,780

3 0

3 years ago