Answer:
$6
Step-by-step explanation:
come on this is simple division, thx for the points though
= 7x - 7 - 82x - 90 = 0 (its -90 because we distribute the negative over 2nd set of brackets)
-75x - 97 = 0
-75x = 97
x = 97/-75 = -1.293.....
27/54 is equivalent to, assuming you want to simplify
27/54=1/2
you divide top and bottom of the fraction by 27
because 27*2=54
Answer:
Option C (28.0°)
Step-by-step explanation:
The questions which involve calculating the angles and the sides of a triangle either require the sine rule or the cosine rule. In this question, the three sides are given and one unknown angle has to be calculated. Therefore, cosine rule will be used. The cosine rule is:
a^2 = b^2 + c^2 - 2*b*c*cos(A°).
The question specifies that a=13, b=21, and c=27. Plugging in the values:
13^2 = 21^2 + 27^2 - 2(21)(27)*cos(A°).
Simplifying gives:
-1001 = -1134*cos(A°)
Isolating cos(A°) gives:
cos(A°) = 0.88271604938
Taking cosine inverse on the both sides gives:
A° = arccos(0.88271604938). Therefore, using a calculator, A° = 28.0 (correct to one decimal place).
This means that the Option C is the correct choice!!!