Ask question

Ask question

All categories

2 years ago

8

#8 Tessa has a plan for a set of stairs made of concrete, as shown. Each stair is 1 point the same width and height and is talle

r than the previous one by the same amount. What is the volume of concrete needed for the set of stairs?
Picture below:

1 answer:

Afina-wow [57]2 years ago

6 0

Answer: 2.43m^3

Step-by-step explanation:

You might be interested in

Find the area and perimeter.

DanielleElmas [232]

Step-by-step explanation:

Perimeter = 12 + x + 6 + 2x + 5

Perimeter = 3x + 23.

Area = ½ × b × h

Area = ½ × 12 × (x + 6)

Area = 6(x + 6)

Area = 6x + 36

4 0

2 years ago

on a piece of paper, graph this system of inequalities. Then determine which region contains the solution to the system. a pictu

slava [35]

C. Region D

Step-by-step explanation:

Just plug the equations into desmos the calculator will graph it and show you with colors where the solution is.

4 0

3 years ago

Please help me solve this.

Snowcat [4.5K]

The cost of the roof is $240

8 0

3 years ago

Solve1 over 25 = 5^x ^+ 4. <br> x = -7/2<br> x = −6 <br> x = 9/2 <br> x = 2

Basile [38]

The equation seems to be

   1
-------- = 5 ^ (x + 4)
25

In that case, this is the solution, stept by step:

1) factor 25: 25 = 5^2

      1
=> ----------- = 5^(x + 4)
       5^2

2) invert 5^2

=> 5^(-2) = 5^(x+4)

3) Given that the bases are equal, the exponents also have to be equal:

=> - 2 = x + 4

3) transpose +4:

=> - 2 - 4 = x

=> x = - 6

Answer: - 6

6 0

3 years ago

The profit from a business is

GuDViN [60]

First of all we will understand the question!!

<em>The</em><em> </em><em>question</em><em> </em><em>is</em><em> </em><em>saying</em><em> </em><em>that</em><em> </em><em>you</em><em> </em><em>are</em><em> </em><em>given</em><em> </em><em>a</em><em> </em><em>function</em><em> </em><em>and</em><em> </em><em>you</em><em> </em><em>have</em><em> </em><em>to</em><em> </em><em>find</em><em> </em><em>the</em><em> </em><em>value</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>which</em><em> </em><em>will</em><em> </em><em>give</em><em> </em><em>the</em><em> </em><em>maximum</em><em> </em><em>profit</em><em>.</em><em>.</em><em>.</em><em> </em><em>Lets</em><em> </em><em>solve</em><em> </em><em>it</em><em> </em><em>by</em><em> </em><em>finding</em><em> </em><em>the</em><em> </em><em>extrema</em><em> </em><em>using</em><em> </em><em>the</em><em> </em><em>vertex</em>

<em> $\rm \: p(x) = - 5 {x}^{2} + 30x + 8$ </em>

<u>Identify the coefficients a and b of the quadratic function</u>

<em> $\rm \: p(x) = { - 5x}^{2} + 30x + 8 \\ \rm \: a = - 5 \: and \: b \: = 30$ </em>

<u>Since a<0, the function has the maximum value at x, calculated by substituting a and b into x=-b/2a</u>

<u> $\rm \: x = \frac{30}{ 2 \times (- 5)}$ </u>

<u>Solve</u><u> </u><u>the</u><u> </u><u>equation</u><u> </u><u>for</u><u> </u><u>x</u><u> </u>

<u> $\rm \: x = 3$ </u>

<u>The maximum of the quadratic function is at </u><u>x</u><u>=</u><u>3</u>

3 0

1 year ago