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3 years ago

-3/4 divided by 2/-8 the four is not negative

Mathematics

2 answers:

Marizza181 [45]3 years ago

4 0

Answer:

The answer is 3.

Step-by-step explanation:

-3/4 divided by 2/-8

take the reciprocal of 2/-8

which is -8/2 then divide

$\frac{-3}{4}$ ÷ $\frac{-8}{2}$

= 3

-3/4 ÷ 2/-8

marissa [1.9K]3 years ago

3 0

The answer is 3 :) hope this is right

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Find the volume of the given solid region in the first octant bounded by the plane 9z+15y+15z=45 and the coordinate planes, usi

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First,

$9x+15y+15z=45\implies 3x+5y+5z=15$

The volume is given by the integral (one of 6 possible combinations),

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Find the maximum and the minimum value of the following objective function, and the value of x and y at which they occur. The f

kumpel [21]

Answer:

The maximum value of the objective function is 112 when x = 0 and y = 7.

Step-by-step explanation:

Given the constraints:

5x+3y≤37, 3x+5y≤35, x≥0, y≥0

Plotting the above constraints using geogebra online graphing tool, we get the solution to the constraints as:

A(0, 7), B(7.4, 0), C(5, 4) and D(0, 0)

The objective function is given as E =2x+16y, therefore:

At point A(0, 7): E = 2(0) + 16(7) = 112

At point B(7.4, 0): E = 2(7.4) + 16(0) = 14.8

At point C(5, 4): E = 2(5) + 16(4) = 74

At point D(0, 0): E = 2(0) + 16(0) = 0

Therefore the maximum value of the objective function is at A(0, 7).

The maximum value of the objective function is 112 when x = 0 and y = 7.

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3 years ago

A builder makes staircases where each step is 29 cm long and rises 18 cm so people dont trip. Every staircase has a stringer - a

Black_prince [1.1K]

Let x represent length of the stringer of the staircase.

We have been given that a builder makes staircases where each step is 29 cm long and rises 18 cm so people don't trip. Every staircase has a stringer - a diagonal support connecting all the steps. We are asked to find the length of the stringer of the staircase.

The length of the stringer of the staircase will be equal to diagonal of right triangle with two legs 29 cm and 18 cm.

Using Pythagoras theorem, we will get:

$x^2=29^2+18^2$