PLEASE PLEASE PLEASE HELP

melamori03 [73]

"Common" means "same for both" or "same for all".

There's nothing common about a single item. There's no such thing
as a "common"factor unless there are at least two numbers.

3 0

3 years ago

What is an equation of the line that passes through the points (1, 2) and (2, -1)?

Jet001 [13]

Answer: m = -3

............................

8 0

3 years ago

Tom’s Shirt Shop’s profit or loss for the last four months was –$1,200, +$8,500, –$950, and +$1,630. What was the total profit o

vekshin1

There is a profit of 7980

7 0

2 years ago

Read 2 more answers

I need help with questions #7 and #8 plz

katen-ka-za [31]

Answer:

7. A = 40.8 deg; B = 60.6 deg; C = 78.6 deg

8. A = 20.7 deg; B = 127.2 deg; C = 32.1 deg

Step-by-step explanation:

Law of Cosines

$c^2 = a^2 + b^2 - 2ab \cos C$

You know the lengths of the sides, so you know a, b, and c. You can use the law of cosines to find C, the measure of angle C.

Then you can use the law of cosines again for each of the other angles. An easier way to solve for angles A and B is, after solving for C with the law of cosines, solve for either A or B with the law of sines and solve for the last angle by the fact that the sum of the measures of the angles of a triangle is 180 deg.

7.

We use the law of cosines to find C.

$18^2 = 12^2 + 16^2 - 2(12)(16) \cos C$