Dustin has only nickels and quarters in his piggy bank. He has 49 coins total for a combined value of $8.85. How many of each does he have . SHow your work

Answers

Answer 1
Answer: x-\ nickels\ny-\ quarters\n\n0,05x+0,25y=8,85\nx+y=49\ \ \ \ x=49-y\n\n\0,05(49-y)+0,25y=8,85\n2,45-0,05y+0,25y=8,85\n0,2y+2,45=8,85\ \ \ | subtract\ 2,45\n0,2y=6,4\ \ \ | divide\ by\ 0,2\ny=32\n\nx=49-32=17\n\nHe\ had\ 17\ nickels\ and\ 32\ quarters.

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Please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

h = 3V / πr2. is the equation

Answer:

ok ill try

Step-by-step explanation:

4 cards are drawn from a well-shuffled deck of 52 cards. What is the probability of obtaining 3 diamonds and one spade?

Answers

The probability is 286 20825.

Final answer:

The probability of drawing three diamonds and one spade from a well-shuffled deck of 52 cards is about 0.0137 or 1.37%.

Explanation:

The subject of this question is the probability in a deck of 52 cards. In a deck, there are 13 cards for each suit: diamonds, spades, clubs, and hearts. In drawing 4 cards, we want to find out the likelihood of picking 3 diamonds and one spade. This type of question deals with combinatorics and probability rules.

First, let's compute the number of ways we can draw 3 diamonds from 13. This is done through a combination, denoted as C(13,3), which equals 286. Next, the number of ways to draw one spade from the 13 available is C(13,1), which equals 13. Therefore, the total favourable outcomes are 286 x 13 = 3718.

Second, let's compute the total number of outcomes which is C(52,4) = 270,725. Therefore, the probability of obtaining 3 diamonds and one spade is 3718/270725, which simplifies to approximately 0.0137 or 1.37% when expressed as a percentage.

Learn more about Combination Probability here:

brainly.com/question/3901018

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/_A and /_B are vertical angles. If m_A = (2x – 4) and mZB = (x + 1)º,then find the value of x.

Answers

1. Set each equation to each other. 2x-4=x+1
2. Subtract x from 2x. 2x-x-4=x-x+1
3. Add 4 to both sides. x-4+4=1+4
4. Answer to value of x=5.

Yusuf bought a DVD player for $280, now it is $220. What is the percent decrease in the price?​

Answers

60 % because 280-220 gets you 60%

Answer:

About 21.4%

Step-by-step explanation:

280 - 220 = 60

60 of 280 = ?

Variable x = percentage

60/280 = x/100

Cross multiply

60 × 100 = 280 × x

6000 = 280x

Divide both sides by 280

6000 ÷ 280 = 280x ÷ 280

21.428.... = x

About 21.4%

Check work:

60/280 = 21.4/100

Cross multiply

60 × 100 = 280 × 21.4

6000 = 5992

6000 is close to 5992

It does not equal exactly 6000 because I estimated the percentage to 21.4% instead of 21.428....%

(x+3)y=14 which ordered pair is a solution to this equation ? A. 7,2 B 11,1 C 3,2 or D 5,2

Answers

The answer would be B.
Steps: 
1. Take your X coordinate and plug it into your equation where the X is.
2. Take your Y coordinate and plug it into your equation where the Y is.
3. Distribute your Y to your numbers in the parenthesis.
4. Finally add the two numbers together.
5. See if you got the same answer on both sides of the equal sign.
Hope this helps! (:
(x + 3)y = 14

We just test each option.

A.  x = 11, y = 1

(x + 3)y = 14

(7 + 3)*2 

10*2

20 = 14        This is not correct, so the option is wrong.



B.  x = 11, y = 1

(x + 3)y = 14

(11 + 3)*1 

14*1

14 = 14        This is correct, so the option is the correct.

So option B is the correct one.  No need to test the other options.

I hope this helps.

The length of my desk is 46 cm how many centimetres short of a metre is the desk 40cm 50cm 30cm 54cm

Answers

A metre = 100 centimeters.


If you say your desk measures 46cm:


100 - 46 = 54


Than you desk is 54cm less than a metre.



Hop eit helped,


Happy homwork/ study/ exam!