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vazorg [7]
3 years ago
9

Find the value of x. If necessary, round to the nearest tenth.

Mathematics
2 answers:
Wewaii [24]3 years ago
8 0

Answer:

7.3 in

Step-by-step explanation:

area = 27 = 54/2 = (x^2)/2

so what squared is 54?

7.34 whatever inches.

round it down, that's 7.3.

drek231 [11]3 years ago
3 0

Answer: 7.3 in

Step-by-step explanation:

To find the the value of x, we will simply use the formula of area of a triangle, substitute the values and then solve.

From the diagram above, the height of the triangle is x and also the base of the triangle is also x, the area of the triangle is  27 sq. in

Area of a triangle =  \frac{1}{2}  base × height

              27             =  \frac{1}{2}   ×   x ×  x

              27               = \frac{1}{2}   ×       x²

                27              =    \frac{x^{2} }{2}

          cross  multiply

                    2   ×  27   =  x²

                        54    =    x²

Take the square roots of both-side

                    √54       =       √x²

                      7.3        =         x

                       x         =       7.3

Therefore the value of x is 7.3 in.

                   

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Answer:

see explanation

Step-by-step explanation:

Note that cos315° = cos45° and sin315° = - sin45° and

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Hence

12(cos315° + isin315°)

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7 0
3 years ago
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pav-90 [236]

Answer:

\frac{1}{81}

Step-by-step explanation:

<u>Key skills: Exponents + Fractions</u>

Use the negative exponent property. If your number is x^-y then it would be the same as 1/x^y

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Step-by-step explanation:

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6 0
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Schach [20]

Answer:

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Step-by-step explanation:

Simplifying

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Multiply (20 + -2x) * (15 + -2x)

V = x(20(15 + -2x) + -2x * (15 + -2x))

V = x((15 * 20 + -2x * 20) + -2x * (15 + -2x))

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V = x(300 + -40x + (15 * -2x + -2x * -2x))

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Combine like terms: -40x + -30x = -70x

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V = (300 * x + -70x * x + 4x2 * x)

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Solving

V = 300x + -70x2 + 4x3

Solving for variable 'V'.

Move all terms containing V to the left, all other terms to the right.

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