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3 years ago

Can you simplify (7+sqrt of 5)(3-sqrt of 5)

Mathematics

1 answer:

Delvig [45]3 years ago

6 0

(7+√5)(3-√5)=21-7√5+3√5-5=16-4√5

Answer: (7+√5)(3-√5)=16-4√5

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How many solutions does the equation 3n + 5 (n-4) = 9n -5 have

Tju [1.3M]

$3n + 5(n - 4) = 9n - 5 \\ \\ 3n + 5n - 20 = 9n - 5 \\ \\ 8n - 20 = 9n - 5 \\ \\ 8n - 9n = - 5 + 20 \\ \\ - n = 15 \\ \\ n = - 15$

<h3>Hope This Helps</h3>

8 0

2 years ago

Lilith and her friend shared a pizza. Lilith ate two sixths of the pizza and her friend ate three sixths. How much pizza did the

Tcecarenko [31]

Step-by-step explanation:

$\frac{2}{6} + \frac{3}{6 } =$

2+ 3

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6 0

1 year ago

How do I solve The sum of a number and 3 is subtracted from 10 the result is 5

meriva

State the given in the question

Given that the sum of a number and 3 is subtracted from, the result is 5

State what is to be found in the question

We are to find the number. In other to achieve this, we would follow the steps below:

Step 1: Represent the number with an unknown

Let x represent the number

Step 2: Interpret the given statement mathematically

If x is the number, then the sum of the number and 3 would be

$x+3$

Then the sum of a number and 3 subtracted from 10 would be

$10-(x+3)$

Finally, when the sum of a number and 3 subtracted from 10, the result is 5, would be

$10-(x+3)=5$

Step 3: Solve for x in the mathematical interpretation of the given statement

The value of x is as calculated as shown below:

$\begin{gathered} 10-(x+3)=5 \\ \text{Open the bracket or the parenthesis} \\ 10-x-3=5 \\ \text{collect like terms} \\ 10-3-5=x \\ 7-5=x \\ 2=x \\ \text{Therefore:} \\ x=2 \end{gathered}$

Hence, the number is 5

4 0

10 months ago

What is the coefficient of 4x^2 ?

aleksley [76]

It has a coefficient of 4 :)

3 0

2 years ago

A soccer team won only 10 of their first 30 games. How many of their remaining 20 games will they have to win to have a .500 rec

jeka94

Answer: 5 games

Step-by-step explanation: A .500 record means that the soccer team won half of their games ( that's how I interpret it). Since they are going to play 30 games, they need to win half of 30 or 15 games to have that record. 15-10 = 5. So, they need to win 5 more games to have a .500 record.

8 0

1 year ago