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4 years ago

Ok I need to know how the got X=8. The equation is x+4/3 = 4

Mathematics

1 answer:

Darya [45]4 years ago

7 0

x+4/3-4/3=4-4/3

x=8/3

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Help pleasee , thank you so much in advance

sp2606 [1]

Answer:

A - 2x + 4 + 50 = 10x - 2

Step-by-step explanation:

1.) It is the only equation that makes mathematical sense

2.) The sum of angles ABD and DBC equal angle ABC, and ABC = 10x -2

Note:

x=7 if it is important later on

8 0

3 years ago

Pythagorean theorem 3d

gayaneshka [121]

Answer:

ihhrhi2rhhb4rhbur4hbur4hb43hubr4u3br

Step-by-step explanation:

3 0

3 years ago

Find the area of the figure to the nearest square unit.

alex41 [277]

Answer:

357 mi²

Step-by-step explanation:

The shape is made of a triangle and a half-square

we will calculate the area of each one

The half square:

let A1 be the area of the half-circle:

A1= (10²*π)/2 = 50π mi²

The rectangle:

Let A2 be the area of the triangle:

A2= 10*20=200 mi²

The whole shape:

let At be the total area:

At =A1+A2= 200+50π =357.07≈ 357 mi²

4 0

3 years ago

The lifetimes of a certain type of light bulbs follow a normal distribution. If approximately 2.5% of the bulbs have lives excee

spin [16.1K]

Answer:

Mean = 339 hours

Standard deviation = 54 hours

Step-by-step explanation:

We are given that approximately 2.5% of the bulbs have lives exceeding 445 hours

So,P(x>445) = 0.025

P(x<445) =1- 0.025 =0.975

z value for 0.975 is 1.96

Formula : $z=\frac{x-\mu}{\sigma}$

So, $1.96=\frac{445-\mu}{\sigma}$

$1.96 \sigma =445-\mu$ --A

Now we are given that approximately 16% have lives exceeding 393 hours,

So,P(x>393) = 0.16

P(x<393) =1- 0.16 =0.84

z value for 0.84 is 1

Formula : $z=\frac{x-\mu}{\sigma}$

So, $1=\frac{393-\mu}{\sigma}$

$1 \sigma =393-\mu$ ---B

Solve A and B

Substitute the value of $\sigma$ from B in A

$1.96 (393 -\mu) =445-\mu$

$770.28 -1.96\mu=445-\mu$

$770.28 -445=1.96\mu-\mu$

$325.28=0.96\mu$

$\frac{325.28}{0.96}=\mu$

$338.83=\mu$

Substitute the value in B

$\sigma =393-338.83$

$\sigma =54.17$

So, mean = 339 hours

Standard deviation = 54 hours

5 0

4 years ago

What is the sum of angles between north east and west

yaroslaw [1]

Answer:

270

Step-by-step explanation:

north to east = 90 degrees

to west = 90 + 90 degrees

90 + 90 + 90 = 270

8 0

2 years ago

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