Answer:
-2
Step-by-step explanation:
divide -3 from both sides
We use the law of Cosines to be able to find : 1. The measure of the
third side, when the measure of two sides and the included angle of a
triangle ABC are known. 2. The measure of any angle, when the measure of
the three sides of a triangle ABC are known.
The Law of Cosines is c² = a² + b² - 2abcosΘ. It has four variables;
a, b, c and Θ. Whenever you have a triangle with three of these
variables known, use the Law of Cosines to calculate the unknown
variable.
Answer:
x= 11
Step-by-step explanation:
4x-8 = 3x+3 (those angles are corresponding angles so they are equal to each other)
4x-3x =3+8
x =11
Part B
Divide 63 by 3 to get 21, the price of one shirt.
Divide 21 by 7 to get 3, 10% of the original price.
Multiply 3 by 10 to get 30, the original price of one shirt.
Answer: $30
Part C
Divide 40 by 10 to get 4, 10% of original price
Multiply 4 by 3 to get 12, 30% of the original price
subtract 12 from 40 to get 28, the price after discount
Divide 28 by 10 to get 2.8, the second 10% discount.
Subtract 2.8 from 28 to get 25.2, the final price.
Answer: $25.20
Answer:
Step-by-step explanation:
7 1/7- 3 5/7= 3 3/7
3 3/7 can also be 3.42 and 24/7
