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Mathematics

1 answer:

MAVERICK [17]2 years ago

3 0

Answer:

50%

Step-by-step explanation:

The P(even or divisor of 28) = P(even) + P(divisor of 28) - P(even and divisor of 28). The P(even) = 2/4 = 1/2. The P(divisor of 28) = 2/4 = 1/2. The P(even and divisor of 28) = 2/4 = 1/2 as 2,4 are even numbers and divisors of 28.

1/2 + 1/2 - 1/2 = 1/2 = 50%

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sdas [7]

Answer: 2x+5y=100 and x+y=38

Step-by-step explanation:

6 0

2 years ago

A certain species of bird is in danger of becoming extinct. There were 1500 birds in 2000 and they are

melamori03 [73]

a) If this trend continues, how many birds will be left by 2010 will be 525

b) The birds would there have been in 1990 will be 2475

<h3>What is rate of increase?</h3>

Rate of increase or decrease is defined as the increment or decrement in any quantity over a period of time constantly.

Here we have the data that:

There were 1500 birds in 2000 and they are decreasing at an annual rate of 6.5%.

a) If this trend continues, how many birds will be left by 2010

{1500x6.25}/{100}=97.5

So the bird decrement in the one year will be =97.5 so it will be in the 10 years or upto 2010 will be

97.5x10=975

So the birds left till 2010 will be:

Q=1500-975=525

b)The birds would there have been in 1990 will be:-

=1500+975=2475

Hence If this trend continues, how many birds will be left by 2010 will be 525.The birds would there have been in 1990 will be 2475

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7 0

2 years ago

Need help<br><br> 3y+5x=22; x=y/2

Marizza181 [45]

Answer-

point from:

(2,4)

explanation from:

x =2, y = 4