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Furkat [3]
3 years ago
13

I need help working question 8. I don't understand how to start it

Mathematics
1 answer:
Lina20 [59]3 years ago
8 0
Why don't you first try to use the cosine law to solve for an angle and then make use of the sin law to solve for the remaining angles.

Cosine law

C^2 = A^2 + B^2 - 2AB(cos C)
Solve for cos C, and then take the inverse of the trig ratio to solve for the angle.

Then set up a proportion like you have done using the sin law and solve for another angle. Knowing the sum of all angles in a triangle add up to 180 degrees, we can easily solve for the remaining angle.
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Please help
vfiekz [6]

Answer:

Step-by-step explanation:

3x + 7 + 9x - 43 = 180

                    12x = 216

                      x = 18

m∠4 = 3(18) + 7 = 61°

m∠5 = 9(18) − 43 = 119°

5 0
3 years ago
3 Slips of paper are numbered 1 through 10. If one slip is drawn and replaced 40 times, how many times should the slip with numb
andrey2020 [161]

Answer: P(draw a 10) = 1/10

-----

P(draw a 10 ten times with replacement) = (1/10)^10 = 1/10000000000

Step-by-step explanation:

8 0
4 years ago
how much 45% acid solution should be mixed with a 30% acid solution to make 450 ml of a 40% acid solution?
FromTheMoon [43]
We do as follows:

let x = amount of 45% solution
    y = amount of 30% solution

overall balance =>    x + y = 450
acid balance     =>    .45x + .30y = .40(450)

Solving simultaneously, we will have:

x = 300 mL
y = 150 mL

This is assuming that partial molar properties does not affect the volume greatly. Hope this answers the question. Have a nice day.
7 0
3 years ago
identify three misconceptions each of any five topics in mathematics (geometry & handling data).​
natulia [17]

Answer:

Step-by-step explanation:

8 0
3 years ago
Please can anyone please help me with that please faster if you know that please???!!?!
qaws [65]

Answer:

For work its 10/100 or 0.1

For Sports its 65/100 or 0.65

Step-by-step explanation:

6 0
3 years ago
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