Me pueden ayudar por favor
-2(8/-10)-5=8(8/-10)+3

Answers

Answer 1
Answer: Hello there, and thank you for posting your question here on brainly.

You have to do the parentheses first for each side of the equation.

-2 * (8 / -10) - 5 = 8 (8 / -10) + 3 ==> -2 * -0.8 - 5 = 8 * -0.8 + 3

Now, we do the multiplication of both sides.

-2 * -0.8 - 5 = 8 * -0.8 + 3 ==> -1.2 - 5 = -6.4 + 3

Finally, we do the addition and subtraction on both sides.

-1.2 - 5 = -6.4 + 3 ==> -6.2 = -3.4

-6.2 = -3.4 is false.

Hope this helped!! ☺♥

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What is the simplest form for 18/39.?

Answers

6/13 is the simplest form
6/13 because 18 and 39 are divisible by 3.

What is the value of -|65.6|

Answers

-65.6
Explanation:
The I I signs (forgot how they are called XD) made the number 65.6, but the negative sign outside the I I made the number -65.6
The answer is -65.6 because the negative sign is on the out side of the absolute value signs.

Roy and Sam start solving the equation as follows.Which student's work is correct so far and what property did he use?

A.
Sam's work is correct so far. He used the addition property of equality.
B.
Roy's work is correct so far. He used the addition property of equality.
C.
Sam's work is correct so far. He used the subtraction property of equality.
D.
Roy's work is correct so far. He used the subtraction property of equality.

Answers

Answer:

The correct option is D.

Step-by-step explanation:

The given equation is

-3x+4=5x-6

According to the addition property of equality a=b and a+c=b+c are equivalent equations.

Use addition property of equality, add 3x on both the sides.

-3x+4+3x=5x-6+3x

4=8x-6

Therefore Sam's work is incorrect because he make calculation mistake.

According to the subtraction property of equality a=b and a-c=b-c are equivalent equations.

Use subtraction property of equality, subtract 5x from both the sides.

-3x+4-5x=5x-6-5x

-8x+4=-6

Therefore Roy's work is correct because he used subtraction property.

Option D is correct.

The average height of a female giraffe is 4.6 meters. what is her height in centimeters?

Answers

Answer: Her height in centimeters will be 460 cm.

Step-by-step explanation:

Since we have given that

Average height of a female giraffe = 4.6 meters

As we know that

1\text{ m}=100\text{ cm}

So, we need to convert 4.6 meters into centimeters.

And we know that meters is more than centimeters so, we use the product operation.

4.6* 100=460.0\text{ cm}=460\text{ cm}

So, her height in centimeters will be 460 cm.

The average height of a female giraffe in centimetres is 460 cm.

Further explanation

Given:

The average height is 4.6 meters (m). What is its height in centimeters? So, in this problem, we are going to convert meters (m) to centimeters (cm)

As we know that : \boxed {1 m = 100 cm\ }

so to convert meter to centimeter, just multiply it with 100 cm

\boxed {4.6 *\ 100 cm = 460 cm\ }

There is another way to do it, in three step:

  • write the conversion in fraction
  • multiply
  • cancel any units that are both top and bottom

\boxed {(100 cm)/(1 m) = (x cm)/(4.6 m)\ }\n  \boxed {x =(4.6 m *\ 100cm)/(1 m)\ }\n \boxed {x=460 cm\ }

We can cancel the meter (m) because it is both on top and the bottom

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Keywords: conversion, converting,unit of length, metric system of measurement, meter to centimeter, unit conversion

The angle of depression of a boat at sea from a 100 foot lighthouse is 20 degrees. Find the distance to the boat.not sure how to solve this..

Answers

Answer:

As per the statement:

The angle of depression of a boat at sea from a 100 foot lighthouse is 20 degrees.

We draw the figure for this problem as shown below:

Height of the lighthouse(BC) = 100 foot

Angle of depression = 20 degrees.

Since, angle of depression is equal to the angles of elevation

i.e, \angle DCA = \angle CAB = 20^(\circ)

using tangent ratio:

\tan \theta = \frac{\text{opposite side}}{\text{adjacent side}}

Here,

Opposite side = BC = 100 foot

Adjacent side = AB

Angle of elevation: \theta = 20^(\circ)

Substitute these to solve for AB:

\tan 20^(\circ) = \frac{100}{\text{AB}}

or

\text{AB} =(100)/(\tan 20^(\circ))

\text{AB} =(100)/(0.36397023426)

Simplify:

AB = 294.375362123 foot

Therefore, the distance to the boat approximately is 294.4 foot

Final answer:

By using the tangent function with the given height of the lighthouse and the angle of depression, we can solve for the distance to the boat, which is approximately  274.1 feet.

Explanation:

In this scenario, we can use trigonometry to find the distance to the boat. Since we know that the lighthouse is 100 feet high and the angle of depression is 20 degrees, this fits the scenario for a tangent function, where tangent of an angle equals the opposite side divided by the adjacent side.

Setting up our function, we get tan(20) = 100/ distance to the boat. Since we want to find the distance to the boat, we can rearrange the equation to be distance to the boat = 100 / tan(20).

Doing this calculation, we find that the distance to the boat is approximately 274.1 feet.

Learn more about Trigonometry here:

brainly.com/question/11016599

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What is the surface area, in square inches, of a 8-inch cube?

Answers

Answer: 384 in²

Step-by-step explanation: Surface area is the sum of the areas of all of the faces of a three-dimensional figure.

So to find the surface area of a cube, it's important to understand that each face of a cube has the same area. So we can simply find the area of one face of a cube and multiply it by the number of faces which is 6.

To find the area of one face of a cube, we can use the formula for the area of a square.

Area = S²

Since the length of a side is 8 inches, we have (8 in.)² or 8 inches x 8 inches which gives us 64 in.².

Now, since there are 6 sides to a cube, we have (64 in.)² (6) which is equal to 384 inches².

Therefore, the surface area of the cube is 384 in².

surface area of a cube=6*s^2=6*8^2=384