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Mazyrski [523]
2 years ago
6

Simplify this algebraic expression completely 10y-3(y+5)

Mathematics
1 answer:
vodka [1.7K]2 years ago
6 0

Answer:

7y - 15

Step-by-step explanation:

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What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the
marishachu [46]
The sum of all the measurements is just the average times the number.

\bar x = \frac{1}{n} \sum_{i=1}^n x_i

\sum_{i=1}^n x_i = n \bar x

So if the average of all 92 is 7 the sum of those is 92 \times 7

The average of the last two is 7.2 so their sum is 2 \times 7.2

That means the sum of the first 90 is 92 \times 7 - 2 \times 7.2

so the average of the first 90 is

 \dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556 cm



7 0
3 years ago
Jon hikes 13.5 mi at a constant rate of 3 mi/h. How many hours does he hike?
joja [24]
13.5/3 = 4.5

He hiked for 4.5 hours.


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3 years ago
What is the value of 30-2(7+2)-1
Firdavs [7]

Answer: 11

Step-by-step explanation:

30 - 2(7+2)- 1        Distribute or  solve parentheses

30 - 14 -4 - 1  

30 - 19 = 11  

6 0
3 years ago
You need to earn at least $100. You earn $8.00 per hour mowing lawns. Write and solve an inequality that represents the number o
leonid [27]

Answer:

subject?

Step-by-step explanation:

7 0
3 years ago
PLEASE HELP THIS IS DUE SOON <33
ozzi

Answer:

5 inches

Step-by-step explanation:

Theorem states that the smaller two sides of a triangle have to be greater than the biggest side.

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