What is the answer to 5x-2=8

2 answers:

5 0

1. You need to get 5x on one side all by itself. So, you need to add 2 to the other side to undo the subtraction

$5x = 8 + 2$

$5x = 10$

2. Divide both sides by 5

$\frac{5x}{5} = \frac{10}{5}$

$x = 2$

sergejj [24]3 years ago

4 0

I hope this helps you

5x=8+2

5x=10

5x÷5=10÷5

x=2

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In an all boys school, the heights of the student body are normally distributed with a mean of 71 inches and a standard deviatio

muminat

Answer:

15.87%

Step-by-step explanation:

First thing here is that we calculate the z-score which corresponds to 76

mathematically;

z-score = (x-mean)/SD

mean = 71 and SD = 5

plugging these values, we have;

z = (76-71)/5 = 5/5 = 1

Now, we want to firstly get the probability that we have a student shorter than 76 inches

The probability we want to calculate is P(z<1)

we can get this using the z-score table directly

That would be 0.15866

In percentage that is 15.866% which is 15.87% to the nearest tenth

7 0

2 years ago

Four subtracted from eight is equal to two squared

Scilla [17]

Yes. This is true because 4 subtracted from 8 is 8-4=4. The value you get from subtracting 4 from 8 equals the same value you would get if you were to take the value of 2 and square it. Both equal 4.

4 0

3 years ago

Imagine you are responsible for writing an advice column about mathematics. The following question is submitted to your column:

marissa [1.9K]

Explanation:

There are two different formulas that are useful with the given information:

Area = (1/2)ab·sin(C)

Area = √(s(s-a)(s-b)(s-c)) . . . where s=(a+b+c)/2

It does not matter which sides are designated a, b, and c. Angle C will be opposite side c.

The third angle can be computed based on the fact that the sum of angles in a triangle is 180°. It will be 180° -32° -28° = 120°. The least-to-greatest order of the angles is the same as the least-to-greatest order of the length of the opposite side. So, we might have ...

a = 7, A = 28°
b = 8, B = 32°
c = 13, C = 120°

Utilizing the first formula, the area is ...

Area = (1/2)(7)(8)sin(120°) = 14√3 ≈ 24.249 . . . square units

Utilizing the second formula, the area is ...

s = (7+8+13)/2 = 14

Area = √(14(14-7)(14-8)(14-13)) = 14√3 ≈ 24.249 . . . square units

For the answer to be complete, it should be noted that using either of the other two angles will give different results for the area. That is because those angles are not exact values, but are rounded to the nearest degree. Using the first formula with the different angles, we get ...

area = (1/2)(8)(13)sin(28°) ≈ 24.413 . . . square units
area = (1/2)(7)(13)sin(32°) ≈ 24.111 . . . square units

The first of these answers is a little high because 28° is a little more than the actual value of the angle. Likewise, the second of these answers is a little low because 32° is slightly smaller than the actual angle.

In short, the most accurate information available should be used if the answer is to be the most accurate possible. If the angles are exact, then their values should be used. If the side measures are exact, then their values should be used. In general, it will be easier to make accurate measurements of the side lengths than to make accurate angle measurements.