3 years ago

Expand the following expression by using distributive method. 3(4x+5y)

Mathematics

1 answer:

ad-work [718]3 years ago

6 0

Answer:

12x+15y is the answer you will get once you distribute.

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Represent the following as integers with appropriate signs ?

Mrac [35]

Answer:

a +100 m

+24 degrees

+4000

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3 years ago

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Suppose that a researcher, using data on class size (CS) and average test scores from 97 third-grade classes, estimates the

Oliga [24]

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Step-by-step explanation:

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3 years ago

Find the sum of 3+9+27...+6561

Nikolay [14]

The sum of the first n terms of a geometric series with first term a₁ and common ratio r is given by the formula
$S_{n}=a_{1}\cdot\dfrac{r^{n}-1}{r-1}$

Then your sum is
$\sum\limits_{n=1}^{8}3^{n}=3\cdot\dfrac{3^{8}-1}{3-1}=9840$

The sum of this geometric series with first term 3 and common ratio 3 is ...
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4 years ago

A sprinkler system is designed to water 5/8 acre of land in 1/4 hour. How many acres of land can it water in 1 hour?

IRISSAK [1]

5/8 acre of land ... 1/4 hour
x acres of land = ? ... 1 hour

If you would like to know how many acres of land can the sprinkler system water in 1 hour, you can calculate this using the following steps:

5/8 * 1 = 1/4 * x
5/8 = 1/4 * x /*4
x = 5/8 * 4
x = 5/2 = 2.5 = 2 1/2 acres of land

The correct result would be 2 1/2 acres of land.

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3 years ago

Evaluate - 2x + y6x<br> When x = 1, y = -5

mojhsa [17]

Answer:

-28

Step-by-step explanation:

2(1) + (-5)6(1)

2+-30

-28

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3 years ago