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3 years ago

S=n/2(a+b) what is the value of b

Mathematics

1 answer:

loris [4]3 years ago

3 0

Answer:

B= $\frac{2S}{n}$ -a

Step-by-step explanation:

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Overview Park has a picnic area and a playground, as shown in the diagram below. What is the area of the playground, in square f

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Answer:

Hi,

Step-by-step explanation:

The playground 's area is the difference of 2 squares:

20²-10²=(20+10)*(20-10)=30*10=300 (ft²)

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2 years ago

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Can someone help me out with this problem

ohaa [14]

Answer:

$\fbox {1) A}\\\fbox {2) A}$

Step-by-step explanation:

Q1

⇒ Graph A is most accurate as the situation is linear and the dots indicate per cup as you can't have any rational part (such as 0.5 cups, etc.)

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2 years ago

Solve this problem out

Virty [35]

Option C

When $(2x - 3)^2$ is subtracted from $5x^2$ then the result is $x^2 + 12x - 9$

<h3>Solution:</h3>

Given that $(2x - 3)^2$ is subtracted from $5x^2$

We have to find the result

Subtraction is a mathematical operation that tells us the difference between two numbers.

When "a" is subtracted from "b", we write in mathematical expression as "b - a"

So $(2x - 3)^2$ is subtracted from $5x^2$ is written mathematically as:

$\rightarrow 5x^2 - (2x - 3)^2$

Expanding the above expression using algebraic identity:

$(a-b)^2 = a^2 - 2ab + b^2$

$\rightarrow 5x^2 - ((2x)^2 -2(2x)(3) + (3)^2)\\\\\rightarrow 5x^2 - (4x^2 - 12x + 9)$

Multiplying the nnegative sign with terms inside bracket

There are two simple rules to remember:

When you multiply a negative number by a positive number then the product is always negative.

When you multiply two negative numbers or two positive numbers then the product is always positive.

$\rightarrow 5x^2 - (4x^2 - 12x + 9)\\\\\rightarrow 5x^2 - 4x^2 + 12x -9\\\\\rightarrow x^2 + 12x - 9$

Hence the result is: $x^2 + 12x - 9$

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3 years ago

austin ran "a" miles. joshua ran at least one more than 3 times the number of miles that austin ran. write an inequality that co

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3a > a is the inequality

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3 years ago

What is the final amount if 2162 is decreased by 3% followed by a further 3% decrease?

Verizon [17]

Answer:

2034.23

Step-by-step explanation:

2162×0.97=2097.14

2097.14×0.97=2034.2258

2034.23

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3 years ago