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Mashutka [201]
4 years ago
10

Solve x+3y=-28 y=-5x using substitution

Mathematics
1 answer:
lisov135 [29]4 years ago
4 0

Answer:

Step-by-step explanation:

x + 3y = - 28

y = -5x

x + 3(-5x) = -28

x -15x = -28

-14x=-28

x=2

y = -5(2)

y=-10

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Which expression represents the volume, in cubic units, of the composite figure? One-third(8)(6)(6) (8)(6)(4) One-third(8)(6)(10
vaieri [72.5K]

The expression of Volume in cubic meter  \frac{1}{3} (8)(6)(6)+(8)(6)(4)

The correct option is (1)

<h3>What is Volume?</h3>

Volume can also be defined as the amount of space occupied by a 3-dimensional object. The volume of a solid like a cube or a cuboid is measured by counting the number of unit cubes it contains.

Volume will be,

V= Volume of rectangular pyramid + Volume of cuboid

 

Volume of rectangular pyramid= \frac{1}{3} * base area* height

                                                   = \frac{1}{3} * 6*8*(10-4)

                                                   =\frac{1}{3} * 6*8*6

Volume of cuboid= l*b*h

                              = 4*6*8

So, Volume   =\frac{1}{3} * 6*8*6 + 4*6*8

                     = \frac{1}{3} (8)(6)(6)+(8)(6)(4)

So, The expression of Volume in cubic meter  \frac{1}{3} (8)(6)(6)+(8)(6)(4).

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3 0
2 years ago
Akira's dog will be having four puppies. Akira performs a
ivanzaharov [21]

Answer:

50/50 but i don know how a coin toss could determine birth

Hope i helped

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Give answer in standard form for part a and b
aniked [119]

a) (23000) × (0.015)

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What is x. Please show *all* the steps.
Zolol [24]

The equation 5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0 is a quadratic equation

The value of x is 8 or 1

<h3>How to determine the value of x?</h3>

The equation is given as:

5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Rewrite as:

-5/x - 2 + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Take the  LCM

[-5(x + 2) + (x -5)(x- 2)]\[x^2 - 4 + [3x + 8]/[x^2 - 4] = 0

Expand

[-5x - 10 + x^2 - 7x + 10]/[x^2 - 4] + [3x + 8]/[x^2 - 4] = 0

Evaluate the like terms

[x^2 - 12x]/[x^2 - 4] + [3x + 8]/[x^2 - 4 = 0

Multiply through by x^2 - 4

x^2 - 12x+ 3x + 8 = 0

Evaluate the like terms

x^2 -9x + 8 = 0

Expand

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Factorize

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Factor out x - 1

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Solve for x

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Brrunno [24]

The average monthly expenses for Bill's utilities is $266.67.

It is given in the question that:-

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Expenditure in February by Bill = $ 284.33

We have to find the average monthly expenses for Bill's utilities.

We know that,

Average monthly expense for utilities = (Expenditure in December + Expenditure in January + Expenditure in February)/3

Hence, using the data given in the question, we can write,

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Average monthly expense for utilities = 800.01/3 =  $266.67

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2 years ago
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