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kow [346]
3 years ago
15

What is the value of x in the equation 4x - 20 = -4

Mathematics
2 answers:
kari74 [83]3 years ago
7 0
X = 6
4x - 20 =-4
4x - 20 =-4
       --------
4x = 24
----------
4       4

x = 6
ICE Princess25 [194]3 years ago
4 0
4x-20+=-4
-4          -4

x-20=-8
   +20  +20

x=12.
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Answer please, thanks.
Rudik [331]
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3 years ago
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tankabanditka [31]

Answer:

0 = 0

Step-by-step explanation:

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A triangle has base 2x+1 and height 6x-3. What value of x would give an area of 240m2?
GREYUIT [131]

Answer:

The values of x which would give an area of 240m² would be:

x=-\frac{\sqrt{161}}{2},\:x=\frac{\sqrt{161}}{2}

Step-by-step explanation:

Given

The base of triangle b = 2x+1

The height of triangle h = 6x-3

The Area of the triangle A = 240 m²

The Area of the triangle has the formula

A = 1/2 × b × h

substituting b = 2x+1, h = 6x-3 and A = 240

240\:=\:\frac{1}{2}\:\left(2x+1\right)\:\times \left(6x-3\right)

480=\left(2x+1\right)\left(6x-3\right)

480=12x^2-3

Subtract 480 from both sides

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12x^2-483=0

3\left(4x^2-161\right)=0

3\left(2x+\sqrt{161}\right)\left(2x-\sqrt{161}\right)=0

Using the zero factor principle

if ab=0, then a=0 or b=0 (or both a=0 and b=0)

2x+\sqrt{161}=0\quad \mathrm{or}\quad \:2x-\sqrt{161}=0

solving

2x+\sqrt{161}=0

2x=-\sqrt{161}

Divide both sides by 2

\frac{2x}{2}=\frac{-\sqrt{161}}{2}

x=-\frac{\sqrt{161}}{2}

also solving

2x-\sqrt{161}=0

2x=\sqrt{161}

Divide both sides by 2

\frac{2x}{2}=\frac{\sqrt{161}}{2}

x=\frac{\sqrt{161}}{2}

Therefore, the values of x which would give an area of 240m² would be:

x=-\frac{\sqrt{161}}{2},\:x=\frac{\sqrt{161}}{2}

3 0
3 years ago
Math. Will Upvote. Please help
Mademuasel [1]
1) True. In a function, each x value has exactly one y value.
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Z, 0, X, 1, U, 2, Q, _, L, 4, F, ...​
vodka [1.7K]

Answer:

3

Step-by-step explanation:

It's mostly an assumption based on the pattern of number placement, so I apologize in advance if this is incorrect.

I'm not sure what this is for.

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