Answer:
The answer is 1st point.
Step-by-step explanation:
By following the steps that is shown in the picture :
56x² - 8x - 7x + 1
1.Group pairs of terms with common factor,
(56x² - 8x) + (-7x + 1)
2.Factor the GCF from each group,
8x(7x - 1) - 1(7x - 1)
3.Use distributive property,
(8x - 1)(7x - 1)
Answer:
A. 17
Step-by-step explanation:
using the cosine rule (also see attached for reference):
AB² = BC² + AC² - 2·AC·BC cos C
2·AC·BC cos C = BC² + AC² - AB²
Given that AC = 18, AB = 12 and BC = 18, substituting these into the formula
2(18)(28) cos C = 28² + 18² - 12²
1008 cos C = 964
cos C = 964/1008
cos C = 0.9563
C = cos⁻¹ 0.9563
C = 16.99 ( = 17° rounded to nearest degree)
Answer: I need this too.
Step-by-step explanation:
A) 8^2 + 12^2=c^2
c= 4(13) or 14.42
B) 8^2 + b^2=12^2
b=4(5) or 8.94