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AfilCa [17]
3 years ago
8

How many integers between 2020 and 2400 have four distinct digits arranged in increasing

Mathematics
2 answers:
ASHA 777 [7]3 years ago
8 0

Answer:

the answer is E

Step-by-step explanation:

Alexxandr [17]3 years ago
7 0
The question to your answer is E-28
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The sum S of the first n integers is given by the formula S=1/2n(n+1). How many integers must be taken to have a sum of
statuscvo [17]

Answer:

25

Step-by-step explanation:

We require to solve for n, hence

\frac{1}{2} n(n + 1) = 325

multiply both sides by 2 to eliminate the fraction

n(n + 1) = 650

n² + n = 650

subtract 650 from both sides to have equation in standard form

n² + n - 650 = 0 ← in standard form

(n + 26)(n - 25) = 0 ← in factored form

equate each factor to zero and solve for n

n + 26 = 0 ⇒ n = - 26

n - 25 = 0 ⇒ n = 25

however, n > 0 ⇒ n = 25


5 0
3 years ago
Aubrey's coach asks her to bring 5 liters of water to practice.
fenix001 [56]

Answer:

C

Step-by-step explanation:

This is because a liter is 1000 milliliters, so multiplying the amount of liters to the milliliters you would get 5000, you would then divide that by 500  since a bottle would contain that much, giving you 10 bottles

8 0
2 years ago
5.8 rational or irrational?
Sunny_sXe [5.5K]

Answer:

Yes,its Rational

Step-by-step explanation:

it is nothing but 58/10

7 0
3 years ago
Read 2 more answers
Name the marked angle in 2 different ways.<br> Q<br> P<br> O<br> N
Alexxandr [17]

Answer:

PQO and OQP

Step-by-step explanation:

PQO: lines OQ and PQ make the angle.

OQP: Not really sure why it asks for two names. You can probably just flip PQO to OQP and that might work. N is not part of the angle so you can't have an answer with that letter.

4 0
1 year ago
The point D(2, -5) is rotated 90° counterclockwise around the origin. What are the coordinates of the resulting point, D′?
jeyben [28]

Answer:

D' = (5, 2)

Step-by-step explanation:

Try to join D and the origin using a line. Counterclockwise means in an opposite direction of rotation of the clock hands. So draw another line towards the right which is perpendicular to the previous line to fine the answer. Remember the length of the lines should be equal.

8 0
3 years ago
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