QUESTION 1
We can use the cosine rule to find the missing side length.
Recall that the cosine rule for a triangle with sides a,b,c and an included angle A is
Let the missing side length in the triangle with sides 6, 9 and the included angle of be units.
We then substitute the values into the cosine rule to obtain;
units to the nearest tenth.
QUESTION 2
We again use the cosine rule:
We substitute the given values to obtain;
to the nearest tenth
QUESTION 3
We again use the cosine rule :
to the nearest hundredth
Answer:
0riginal price = 4900
Step-by-step explanation:
294 = 6%
294/6 = 49 49 = 1%
49 x 100 = 4900
0riginal price = 4900
8^3 = 512
8^3 also eqauls 8 x 8 x 8.
I hope I helped!
Answer:
We conclude that it took 5 hours and 20 minutes for the freezer to reach that temperature.
Step-by-step explanation:
We know that the temperature of the freezer is never greater than -2°C. Yesterday the temperature was -10°C but it increased at a steady rate of 1.5°C per hour. We calculate how long in hours and minutes did the temperature increase inside the freezer.
We conclude that the difference in temperature is 8°C.
We get:
We conclude that it took 5 hours and 20 minutes for the freezer to reach that temperature.
Step-by-step explanation:
EF = 4x - 15
FG = 3x - 7
EG = EF + FG = 20
so,
4x - 15 + 3x - 7 = 20
7x - 22 = 20
7x = 42
x = 6
EF = 4×6 - 15 = 9
FG = 3×6 - 7 = 11