A fish tank contains 18 goldfish and 22 guppies. If you randomly select 2 fish, what is the probability that they are both goldfish?

Answers

Answer 1

Answer: 18 goldfish+22 guppies=40 total
18/40 are goldfish and 22/40 are guppies
Odds that 1 goldfish is chosen at random is 18/40 or 9/20 when simplified so odds that 2 goldfish are chosen at random is 9/20×9/20=81/400 or 20.25%

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If you had 13 cookies and you gave and even amount to 4 friends would you have any cookies left over

Answers

Answer:

yes

Step-by-step explanation:

every person would get 3 and be 1 left.

Answer:

Yes

Step-by-step explanation:

If you gave each friend 2 cookies, then you gave away 8 and would have 5 left over.

A new car that sells for $19,000 depreciates (decreases in value) 21% each year. What is the decay factor, b? 0.79 0.21 79 21

Answers

Answer: 0.79

Step-by-step explanation:

Given: The cost price of car = $19,000

The rate of depreciation = 21 % = 0.02

The exponential decay equation (depreciation) is given by :-

$y=Ab^x$ , where A is the initial amount and b is the decay factor for x years such that $b=(1-r)$ , where r is the rate of decay.

If we substitute the value of r , we get

The decay factor = $b = (1-0.21)=0.79$

The decay factor is 0.21 ((:

You have been contracted to replace a countertop in a kitchen. You will get paid $1,000 to do the job. You can complete the job in three days working 8 hours a day. You will need to pay the cost of the materials, which is $525, with the $1,000 that you receive to do the job. How much will you be paid per hour for your time?

Answers

Answer:

$19.79 cents (rounded to the nearest cent)

Step-by-step explanation:

first subtract the amount needed for materials from your total pay

(1000 - 525 = 475)

take 475 and divide that among the hours you work.

475 / 24 = 19.7916666

round that number to the closest money value

19.79

What is the equation y=2-3x in standard form