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Artyom0805 [142]
3 years ago
7

The multiplication property of equality could be used to solve which of the following equations?

Mathematics
2 answers:
USPshnik [31]3 years ago
4 0
Well
first one doesn't need that property
2nd one needs subtraction property of equality
third one can use it
fourth one needs addition property of equality


3rd one is answer
b/-2=18 is answer
Oduvanchick [21]3 years ago
3 0

b ÷ (-2) = 18
hope it helps

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Ivanshal [37]
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3 years ago
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inn [45]
Answer is 100 as the next would be 200
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2 years ago
Given -3(2x+7)=-29-4x prove x=4
Doss [256]

Answer:

x = 4

Step-by-step explanation:

Given

- 3(2x + 7) = - 29 - 4x ← distribute parenthesis on left side

- 6x - 21 = - 29 - 4x ( add 4x to both sides )

- 2x - 21 = - 29 ( add 21 to both sides )

- 2x = - 8 ( divide both sides by - 2 )

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A bin is constructed from sheet metal with a square base and 4 equal rectangular sides. if the bin is constructed from 48 square
kondaur [170]
This is a problem of maxima and minima using derivative.

In the figure shown below we have the representation of this problem, so we know that the base of this bin is square. We also know that there are four square rectangles sides. This bin is a cube, therefore the volume is:

V = length x width x height

That is:

V = xxy = x^{2}y

We also know that the <span>bin is constructed from 48 square feet of sheet metal, s</span>o:

Surface area of the square base = x^{2}

Surface area of the rectangular sides = 4xy

Therefore, the total area of the cube is:

A = 48 ft^{2} =  x^{2} + 4xy

Isolating the variable y in terms of x:

y =  \frac{48- x^{2} }{4x}

Substituting this value in V:

V =  x^{2}( \frac{48- x^{2} }{x}) = 48x- x^{3}

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\frac{dv}{dx} = 48-3x^{2} =0

Solving for x:

x =  \sqrt{\frac{48}{3}} =  \sqrt{16} = 4

Solving for y:

y =  \frac{48- 4^{2} }{(4)(4)} = 2

Then, <span>the dimensions of the largest volume of such a bin is:
</span>
Length = 4 ft
Width =  4 ft
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And its volume is:

V = (4^{2} )(2) = 32 ft^{3}

8 0
3 years ago
In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale
gogolik [260]

Answer:

i think the original price is 60

Step-by-step explanation:

25% of 60 is $45.

4 0
3 years ago
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