3 years ago

Work out the size of angle a AB = 11cm AC = 9cm

Mathematics

1 answer:

Papessa [141]3 years ago

8 0

Step-by-step explanation:

simply use trig ( cos)

so cosx°= 9/11

now do cos^-1 x°(9/11) in a calculator to find the value of the angle

that will result in 35.09°

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erastova [34]

Answer:

$x = - 23$

Step-by-step explanation:

$\frac{20 - (40 + x)}{12} \times 10 = 32.5 - 30 = 2.5$

$= > \frac{20 - (40 + x)}{12} = 0.25$

$= > \frac{20 - (40 + x)}{12} = \frac{1}{4}$

$= > 20 - (40 + x) = \frac{12}{4} = 3$

$= > 40 + x = 20 - 3 = 17$

$= > x = 17 - 40 = - 23$

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3 years ago

If p(x)=2x^2-4x and q(x)=x-3 what is (p*q)(x)

Tanya [424]

Answer: 2x³-10x²+12x or 2x(x²-5x+6)

Step-by-step explanation:

(p*q)(x) means p(x) and q(x) multiplied together.

(2x²-4x)(x-3)

2x³-6x²-4x²+12x

2x³-10x²+12x

You can also factor this by taking out a 2x.

2x(x²-5x+6)

4 0

3 years ago

Answer and explain please ILL MARK BRAINLIEST PLEASE HELP

Slav-nsk [51]

Answer:

8:30 am

Step-by-step explanation:

8 0

3 years ago

The sum of Bobbi's and Dan's heights is 130 inches. Dan's height subtracted from 3 times Bobbi's height is 118 inches. What are

Xelga [282]

Answer:

Dan = 68

bobbi = 62

Step-by-step explanation:

Let Bobbi's height = b

Let Dan's height = d

the following equations can be determined from the question

b + d = 130 eqn 1

3b - d = 118 eqn 2

Multiply eqn 1 by 3

3b + 3d = 390 eqn 3

Substract eqn 2 from 3. this gives

4d = 272

d = 68

Substitute for d in eqn 1

b + 68 = 130

b = 62

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3 years ago

Sketch one cycle of the cosine function y=-cos 3 theta

Bumek [7]

The graph of the equation given by y=-cos³θ will be as follows:

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