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3 years ago

How many 4-digit numbers are multiples of at least one of these two numbers: 2; 5.

Mathematics

1 answer:

hodyreva [135]3 years ago

8 0

Answer:

There are 5400 4 digit numbers with these two numbers.

Step-by-step explanation:

To get this, you have to find the number of multiples of 2, which is 9000 4 digit numbers, which is 4500, and for 5, it would be 9000/5 = 1800.

So we have 4500 and 1800.

We first have to figure out the union of these two sets (the numbers listed in the two sets with no repeating numbers.

So to do this, we need to figure out how many 4 digit numbers for 10 because that is the repeat which is 2 times 5 = 10.

Now, we divide the 9000 4-digit numbers by 10 to get 900

Finally, we add the 4500, and 1800, and subtract the repeating part, which is 900

This makes the expression 4500+1800-900, which simplifies to 5400.

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Answer:

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Step-by-step explanation:

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3 years ago

How do I write 974 in expanded form

igor_vitrenko [27]

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How do i do question 3 a b c

viva [34]

Answer:

a) 240°

b) 30°

c) 225°

Step-by-step explanation:

To solve these equations you have to use the inverse of the given trigonometric functions. The inverse of sin is arcsin, and the inverse of tan is arctan. Instead of giving an angle, what is its sine?, the question is: given a sine, what is the angle?.

sin(θ) = -√3/2

θ = arcsin(-√3/2)

θ = -60°

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θ = arctan(1/√3)

θ = 30°

csc means cosecant, by definition:

csc(θ) = 1/sin(θ)

csc(θ) = -√2

1/sin(θ) = -√2

sin(θ) = -1/√2

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3 years ago

For a sequence an=an-1+an-2 and a1=1, a2=2, find its first four terms

ASHA 777 [7]

Answer:

3, 5, 8, 13

Step-by-step explanation:

aₙ = aₙ₋₁ + aₙ₋₂

a₃ = a₂ + a₁ = 2 + 1 = 3

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a₅ = a₄ + a₃ = 5 + 3 = 8

a₆ = a₅ + a₄ = 8 + 5 = 13

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3 years ago

Solve the following equation for x. 3x - 9 = -42

r-ruslan [8.4K]

Answer:

x = -11

Step-by-step explanation:

Add 9 to both sides of the equation

3 − 9 = −42

3 − 9 + 9 = −42 + 9

Simplify

Add the numbers

3 = −33

Divide both sides of the equation by the same term

3 = −33

3/3 = −33/3

Simplify

Cancel terms that are in both the numerator and denominator

Divide the numbers

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2 years ago