All categories

3 years ago

Evaluate the expression if a=-2 and b = 5

Mathematics

1 answer:

yawa3891 [41]3 years ago

5 0

If , a = (-2) and b = 5

Then :-

$= \frac{8 \times 5 - 6 \times ( - 5)}{13}$

$= \frac{40 - ( - 30)}{13}$

$= \frac{70}{13}$

$= 5.384615$

$∴ \: \frac{8 \times 5 - 6 \times ( - 5)}{13} = 5.384615$

You might be interested in

Based on the data in this two-way table, if a flower is picked at random, what is the probability of getting a yellow flower?

adelina 88 [10]

The sample space of the problem includes all the roses and hibiscus in a variety of colors. The sample space is equal to 315 flowers. There are 20 pink roses in the table so the probability of taking a pink rose out of the set is 20/315 or equal to 0.063

3 0

4 years ago

Prove that the natural number x is prime if and only if x>1 and there is no positive integer greater than 1 and less than or

UNO [17]

There are several ways to prove a mathematical statement. These ways include: by contradiction, by induction, contraposition, etc

<h3>How to prove the statement by contradiction</h3>

To prove the statement, we make use of proof by contradiction

From the question:

x is a composite number such that: x > 1

This means that 1 < a < x is a factor of x

This can be represented as:

$x = a * b$

Where:

a and b are positive integers
1 < a, b < x

Assume that b is less than or equal to a.

Also, let

$b > \sqrt x$

This means that:

$\sqrt x < b \ge a$

The above becomes

$\sqrt x < a$

Rewrite as:

$a > \sqrt x$

So, we have:

$x = a * b > \sqrt x * \sqrt x = x$

The above means that:

$x > x$

The above inequality is a contradiction because, a number x cannot be greater than itself

This means that, the supposition is wrong.

Hence, the given statement has been proved by contradiction

Read more about proof by contradiction at:

brainly.com/question/8062770

3 0

2 years ago

A circle is shown. Identify the center of the circle.

Vlada [557]

Step-by-step explanation:STEP 1: Draw two straight, intersecting tangent lines onto the circle. The lines can be completely random. However, the process will be easier if you make them roughly square or rectangular.

STEP 2: Translate both of the lines to the other side of the circle. You will end up with four tangent lines forming a parallelogram or a rough rectangle.

STEP 3: Draw the diagonals of the parallelogram. The point where these diagonal lines intersect is the circle's center.

STEP 4: Check the accuracy of the center with a compass. The center should be on target as long as you didn't slip while translating the lines or when drawing the diagonals. Feel free to erase the parallelogram and diagonal lines.

5 0

4 years ago

Cuanto es la raíz cuadrada de 6

Arte-miy333 [17]

La raíz cuadrada de seis √6 = 2.44948974278

4 0

3 years ago

Please Help & Please Answer This Correctly(Worth 20 Points!)

ElenaW [278]

Answer:

So on the one hand, you could say from these results that 10% of Earth is inhabited by humans. Or you could take a more glass half-empty view and say that 90% of Earth is covered by humans – either populated or connected with an ever-expanding network of roads, train tracks, highways, farms and industrial land.

Step-by-step explanation:

5 0

3 years ago