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3 years ago

What is the value of x?

Mathematics

2 answers:

Julli [10]3 years ago

6 0

Answer:

Step-by-step explanation: 90-30=60 60÷4=15

zmey [24]3 years ago

3 0

Answer:

Step-by-step explanation:

The angle in total is 90* because its a right angle.

The equation is 4x+30=90

subtract 30 from both sides

4x=60

divide 4 from both sides

x=15

hope this helped!

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Two forty- four plus what equals two sixty-nine

Pavlova-9 [17]

Assuming you mean 244+?=269, the answer is 25. Hope this was right

7 0

2 years ago

Read 2 more answers

A closed box has a square base with side length feet and height feet given that the volume of the box is 34 ft.³ express the sur

Deffense [45]

Answer:

$\dfrac{2s^3+136}{s}$

Step-by-step explanation:

Let the side length of the square base =s feet

Let the height of the box = h

Given that the volume of the box = $34$ ft^3$

Volume of the box = $s^2h$

Then:

$s^2h=34$ ft^3\\$Divide both sides by s^2\\h=\dfrac{34}{s^2}$

Surface Area of a Rectangular Prism =2(lb+bh+lh)

Since we have a square base, l=b=s feet

Therefore:

Surface Area of our closed box $= 2(s^2+sh+sh)$

$S$urface Area= 2s^2+4sh\\Recall: h=\dfrac{34}{s^2}\\$Surface Area= 2s^2+4s\left(\dfrac{34}{s^2}\right)\\=2s^2+\dfrac{136}{s}\\$Surface Area in terms of length only=\dfrac{2s^3+136}{s}$

7 0

2 years ago

Find the margin of error for a 90% confidence interval when the standard deviation is LaTeX: \sigma= 50????=50 and LaTeX: n = 25

Murrr4er [49]

Answer:

The margin of error for a 90% confidence interval is 16.4

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 25

Standard deviation = 50

$z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64$

Margin of error =

$z_{critical}\times \dfrac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$1.64\times \dfrac{50}{\sqrt{25}} = 16.4$

Thus, the margin of error for a 90% confidence interval is 16.4

8 0

3 years ago

Please solve this...I can;t do it do it

yanalaym [24]

Answer:

Area = 867 meters

Step-by-step explanation:

You have a rectangle. This means opposite sides are equal. If you set these expressions equal to each other, you will get two equations with two unknowns, x and y. Next, solve the system of equations to find x and y. Then, use the values to find the length and width of the rectangle. Last, multiply length × width to find the area.

8 0

2 years ago

Help on this problem?? please?

Reptile [31]

MrBillDoesMath!

Answer to #4: 81/256 * s^8 * t^ 12

Comments:

(7x^3) ^ (1/2) = 7 ^ (1/2) * x^(3/2) where ^(1/2) means the square root of a quantity. The answer written (7x^3) is NOT correct.

---------------------

(1) (27s^7t^11)^ (4/3)

= 27^(4/3) * (s^7)^(4/3) * (t^11)^ (4/3)

As 27 = 3^3, 27 ^(4/3) = 3^4 = 81

(2) (-64st^2)^ (4/3) = (-64)^(4/3) * (s^4/3) * t(^8/3)

As 64 = (-4)^3, (-64)^(4/3) = (-4)^4 = +256

So (1)/(2) =

81 * s^(28/3)* t^(44/3)

------------------------------- =

256 s^(4/3) * t^((8/3)

81/256 * s ^ (28/3 - 4/3) * t^(44/3 - 8/3) =

81/256 * s^(24/3) * t (36/3) =

81/256 * s^8 * t^ 12

MrB

5 0

3 years ago