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4 years ago

Write an equivalent expression for n times a using only addition

1 answer:

8 0

Whenever you multiply something, you just add it to itself that many times.

ex) 7 × 4 = 7 + 7 + 7 + 7.

Thus n × a = n + n + n + n....a times.

You might be interested in

The amount $180.00 is what percent greater than $135.00

horsena [70]

33.33% is the answer.

7 0

3 years ago

What is the arc length of a circle (in meters) with a radius of 2 meters that has an arc angle of 90°? A 2π B π C 2 D 4π

Musya8 [376]

$\bf \textit{arc's length}\\\\
s=\cfrac{\theta \pi r}{180}~~
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad de grees\\ 
------\\
r=2\\
\theta =90
\end{cases}\implies s=\cfrac{(90)\pi (2)}{180}\implies s=\pi$

7 0

4 years ago

You are choosing between two health clubs. Club A offers membership for a fee of $ 28$28 plus a monthly fee of $ 20.$20. Club B

eimsori [14]

Answer:

That is to say that at 3 months, the values of the club are equal.

Club A = 268 dollars in total

Club B = 295 dollars in total

Step-by-step explanation:

The first thing is to propose an equation for each club. Let m be the number of months.

Club A = 28 + 20 * m

Club B = 19 + 23 * m

Now, to know when it is the same, we must equal the value of Club A with Club B, it would look like this

28 + 20 * m = 19 + 23 * m

By rearranging the equation we have:

23 * m - 20 * m = 28-19

3 * m = 9

m = 3

That is to say that at 3 months, the values of the club are equal.

Now to know the total value, we will do it with an annual membership, which would be a total of 12 months, therefore it is to replace in the equation of each one:

Club A = 28 + 20 * 12 = 268 dollars in total

Club B = 19 + 23 * 12 = 295 dollars in total

3 0

3 years ago

Triangle ABC was transformed to be triangle DEF using one transformation.

Mice21 [21]

Your answer is correct.

8 0

3 years ago

Complete the square leave your answer in root form. 2x² - 6x - 3 = 0

nexus9112 [7]

Answer:

x = 1.5 ± √3.75

Step-by-step explanation:

There are several variations of completing the sqaure.

This is the one I use.

-------------------------------------

2x² - 6x - 3 = 0

add 3 to both sides

2x² - 6x = 3

the x² coefficient must be 1

so divide both sides by 2

x² - 3x = 1.5

use half the x coefficient (-3/2 = -1.5) as the complete the square term

(x - 1.5)² = 1.5 + (-1.5)²

(x - 1.5)² = 1.5 + 2.25

(x - 1.5)² = 3.75

Take the square root of both sides

x - 1.5 = ± √3.75

add 1.5 to both sides

x = 1.5 ± √3.75

6 0

3 years ago

Read 2 more answers