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kondaur [170]
3 years ago
7

X^2=7^2+8^2-2(7)(8)(cos32)

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
3 0

Answer:

x ≈4.244833711

Step-by-step explanation:

x^2=7^2+8^2-2(7)(8)(cos32)

Determine the powers

x^2=49+64-2(7)(8)(cos32)

Multiply from left to right

x^2 = 49+64 - 112cos32

x^2 = 49+64 - 94.98138677

Add and subtract

x^2 =113-94.98138677

x^2 = 18.01861323

Take the square root of each side

sqrt(x^2) = sqrt(18.01861323)

x = sqrt(18.01861323)

x ≈4.244833711

x^2 =113

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Please Help & Thank You
makkiz [27]

Answer:

67 \frac{1}{2}  cm^3

Step-by-step explanation:

the volume of a rectangular prism is the three sides multiplied together, h*w*l

converting the mixed number to improper fraction to make multiplying easier.

\frac{9}{2} *6*\frac{5}{2} = \frac{135}{2}

converting back to mixed number in simplest form

\frac{135}{2}= 67 R 1

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4 0
3 years ago
Evaluate the dot product of (7, 5) and (- 5, 4)
melamori03 [73]

Answer:

The dot product of (7,5) and (-5,4) is -15

Step-by-step explanation:

Given

(7,5) and (-5,4)

Required

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a.b = {a_1b_1+a_2b_2+...+a_nb_n}

Let a = (7,5) and b = (-5,4);

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a.b = {7*-5+5*4}

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Hence, the dot product of (7,5) and (-5,4) is -15

5 0
3 years ago
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Marta_Voda [28]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Daniela is a stain glass artist; she created the window below for her living room. What is
OLga [1]
The window has a shape of a semi-circle (half of a circle).

We know the diameter d = 12 ft.

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A = π × r²

The radius can be found by halving the diameter:
r = d ÷ 2
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Therefore the area of the circle will be:
<span>A = π × r²
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And the area of the semi-circle:
A = </span><span>113.04 </span>÷ 2
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Hence, the area of the window will be 56.52 ft².
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A Country’s population in 1990 was 134 million. In 2000 it was 139 million. Estimate the population in 2014 using the exponentia
Ivahew [28]

Answer:

167 million

Step-by-step explanation:

The ratio is 1 million people every 2 years

7 0
3 years ago
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