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sashaice [31]
3 years ago
14

Cual es el resultado de la siguiente expresión aritmética?(-3) (1/8)+(-2.5)

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Answer: =-2.875

Step-by-step explanation:

\left(-3\right)\left(\frac{1}{8}\right)+\left(-2.5\right)

=-3\cdot \frac{1}{8}-2.5

=-\frac{3}{8}-2.5

=-0.375-2.5

=-2.875

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A triangular sail has a base length of 2.5 centimeters. The area of the sail is 3.75 square meters. How tall is the sail?
seraphim [82]

The area of any triangle = (1/2) x (length of the base) x (height)

2.5 centimeters  =  0.025 meter

The area of the sail is           (3.75) = (0.5) x (0.025) x (height)

Multiply each side by  2 :      (7.5) =            (0.025) x (height)

Divide each side by  0.025 :  (7.5)/(0.025) = height  =<em>  300 meters</em>

The situation is stupid, but the math is bullet-proof.


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3 years ago
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3 years ago
For the right triangles below, find the exact values of the side lengths b and d.
Ivanshal [37]

Answer:

Step-by-step explanation:

The question lacks the required diagram. Find the diagram attached below;

According to the first triangle, taking 30° as the reference angle, the opposite side of the triangle will be 5 and the adjacent will be the unknown side "b"

According to SOH, CAH, TOA;

tanθ = opposite/adjacent (using TOA)

Given;

θ = 30°, opposite = 5 and adjacent = b

tan30° = 5/b

b = 5/tan30°

b = 5/(1/√3)

b = 5*√3/1

b = 5√3

According to the 45° triangle, the opposite side of the triangle will be d and the hypotenuse will be 7

Using SOH;

sinθ = opposite/hypotenuse

Given;

θ = 45°, opposite = d and adjacent = 7

sin45° = d/7

d = 7sin45°

d = 7(1/√2)

d = 7/√2

Rationalize 7/√2

= 7/√2*√2/√2

=7√2/2

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3 years ago
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algol [13]

The mean of the discrete probability distribution is of 1.28.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability</u>.

Then, considering the given distribution, the mean is given by:

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More can be learned about the mean of a discrete probability distribution at brainly.com/question/24855677

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Step-by-step explanation:

is the number of unit squares that cover surface of a figure.

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