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Aleksandr [31]
3 years ago
10

One number is 8 times another. their product is 40 times their sum. find the numbers.

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
3 0
X = 8y
xy = 40 ( x + y )
xy = 40x + 40y
8y(y) = 40(8y) + 40y
8y^2 - 32y - 40y = 0
8y^2 = 72
y^2 = 9
y = 3 , y = - 3

x = 8(3)
x = 24

y = 3
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belka [17]
Susanne is 16 years old.

b = Bob's age

s = Susanne's age

d = Dakota's age

Bob's age is 4 times greater than Susanne's age:

b = 4s

Dakota is three years younger than Susanne:

d = s - 3

The sum of Bob's, Susanne's, and Dakota's ages is 93:

b + s + d = 93


 solve these equations:

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b + s + d = 93


and get:

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3 years ago
Mary earns $5 per hour as a waitress. Last week she took home her regular earnings of $5 per hour plus $186 in tips for a total
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In a set of integers from 140 to 200 inclusive, how many integers are divisible by 4 and 6?
Ronch [10]

The answer to the question asked is 5.

The least common multiple of 4 and 6 is 12. In the range 140 to 200, there are

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_____

The list of answer choices suggests that the question is intended to be, "how many integers are divisible by 4 or 6?"

The number divisible by 4 is

... floor(200/4) - ceiling(140/4) + 1 = 50 - 35 + 1 = 16

The number divisible by 6 is

... floor(200/6) - ceiling(140/6) + 1 = 33 - 24 + 1 = 10

We know from the above that there are 5 values that are divisible by both 4 and 6, so will be counted twice if we simply add the above numbers. Hence the number of values divisible by 4 or 6 is

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3 0
3 years ago
Plz help i realy need it im gonna fail if i dont get this
Anna11 [10]

Answer:

It is between 13 and 13.5

Step-by-step explanation:

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It is between 13 and 13.5

3 0
3 years ago
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