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Serga [27]
3 years ago
13

PLEASE HELP 20 POINTS One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ What is the sum of all the digits that Ri

ver wrote down?
Mathematics
1 answer:
Temka [501]3 years ago
6 0

Answer:

LOL this is from AOPS

Step-by-step explanation:

LOL tryna cheat out here

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a scientist has two solutions which she has labeled solutions A and solution B each contains salt. she knows that solution A is
loris [4]

Answer

Let x = the number of ounces of Solution A

Let y = the number of ounces of Solution B

x + y = 180        y = 180 - x

.60x + .85y = .75(180)

.60x + .85y = 135      Multiply both sides of the equation by 100 to remove the decimal points.

60x + 85y = 13500

60x + 85(180 - x) = 13500

60x + 15300 - 85x = 13500

-25x = -1800

x = 72ounces

y = 180 - 72

y = 108 ounces          

6 0
3 years ago
The point (3,-4) is on the terminal side of an angle 0. What is cos 0?
aleksandr82 [10.1K]

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Answer:

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Step-by-step explanation:

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  d = √(3² +(-4)²) = √(9+16) = 5

The cosine of the angle is the ratio of the x-coordinate to this value:

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3 0
3 years ago
There are 10 red apples and 12 green apples in a basket. If Vinta randomly selects 3 apples from
balu736 [363]

Answer: 1/7

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3 years ago
How to graph the inequalities y is less than or equal too 2
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Answer: sry 4 the late answer hope it helps!!!

Step-by-step explanation:

4 0
4 years ago
What is the constant of proportionality represented in the graph? A) 0 B) 1/4 C) 10 D) 4
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Answer:

D)4

Step-by-step explanation:

rise over run

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=4

6 0
4 years ago
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