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3 years ago

How many steel rods are in a staircase frame with 12 steps?

Mathematics

1 answer:

kolbaska11 [484]3 years ago

3 0

180 steel rods to be exact

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Please help ASAP!!!!!!!!!!

Alexxandr [17]

Value of x is 10

Step-by-step explanation:

Step 1: Here, x is the hypotenuse of the right angled triangle. Use the trigonometric ratio cosine to find x.

cos 28° = adjacent side/hypotenuse = 11/x

⇒ x = 11/cos 28° = 11/-0.96 = -11.46 ≈ 10 (rounding off to nearest tenth)

6 0

4 years ago

What is the solution to : 3(1/2 m - 3) =45

VladimirAG [237]

Answer:

$m=36$

Step-by-step explanation:

We can solve for this equation by isolating $m$ on one side. To do this, we can "reverse" the equation.

$3(\frac{1}{2}m - 3) = 45$

Let's divide both sides by 3.

$3(\frac{1}{2}m-3)\div3 = 45\div3\\\\\frac{1}{2}m - 3 = 15$

Add 3 to both sides:

$\frac{1}{2}m - 3 + 3 = 15 + 3\\\\\frac{1}{2}m = 18$

Multiply both sides by two (since $\frac{1}{2}\cdot2=1$ )

$\frac{1}{2}m \cdot 2 = 18 \cdot 2\\\\m = 36$

Hope this helped!

6 0

3 years ago

Read 2 more answers

The height odf a regtangular pyramid is 4 inches. The base of the pyramid measures 9 inches by 9 inches. What is the volume of t

mrs_skeptik [129]

Answer:

$V=108\ \text{inches}^3$

Step-by-step explanation:

Given that,

The height of a rectangular pyramid is 4 inches

The base of the pyramid measures 9 inches by 9 inches.

We need to find the volume of the rectangular pyramid. The formula for the volume of the rectangular pyramid is given by :

$V=\dfrac{lbh}{3}$

Substitute all the values,

$V=\dfrac{4\times 9\times 9}{3}\\\\V=108\ \text{inches}^3$

So, the volume of the rectangular pyramid is $108\ \text{inches}^3$ .

8 0

3 years ago

0, 1, 1, 2, 3, 5, 8, , , ,<br> Complete the series

Kazeer [188]

0,1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811.......

3 0

3 years ago

Read 2 more answers

And choose D is 38<br> Some help me

Dmitry_Shevchenko [17]

Answer:A

Step-by-step explanation:

it is equivalent to 180-128 because its the same as the angle under route 2

and above runway 2

4 0

3 years ago

Read 2 more answers