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krok68 [10]
3 years ago
5

A square has a side that is (x-3) units long. If the area of the square is 126.5625 sq units, what is the value of x?

Mathematics
1 answer:
Kitty [74]3 years ago
4 0

Answer:

14.25 units

Step-by-step explanation:

Area of a square= l*b= (x-3)(x-3)=x^{2}-3x-3x+9=x^{2}-6x+9

x^{2}-6x+9=126.5625

x^{2}-6x-117.5625

Solving the equation using quadratic equation then as attached

x=14.25 units

To prove

x-3=14.25-3= 11.25 units

area=11.25*11.25=126.5625 sq units

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

I'll solve the first one . The other can be solved in a similar way. We can use the method of elimination.

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8 0
3 years ago
what is the domain of the function: {(1, 3); (3, 5); (5, 7); (7, 9)}? a. {1, 3, 5, 7, 9} b. {1, 3, 5, 7} c. {1, 9} d. {3, 5, 7,
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A rectangle has a length that is 2 meters more than the width. The area of the rectangle is 288 square meters. Find the dimensio
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Step-by-step explanation:

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7 0
3 years ago
If, P(x,y) is a point on the unit circle determined by real number δ, then tanδ = what
Lisa [10]
\bf sin(\theta)=\cfrac{opposite}{hypotenuse}
=\cfrac{y}{r}
=\cfrac{1}{csc(\theta)}
\\ \quad \\\\
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=\cfrac{x}{r}
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-------------------------------\\\\
P(x,y)\implies \delta\qquad tan(\delta)=\cfrac{y}{x}
5 0
3 years ago
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