2 years ago

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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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

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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

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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:

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Step-by-step explanation:

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3 years ago

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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.

The least possible answer would be 5 inches.

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2 years ago