Answer:
-30
Step-by-step explanation:
Congruent angles have the same angle measures.
So: x + x = 15
2 x = 15
x = 15 : 2
x = 7.5°
Answer:
Those congruent angles measure 7.5° or 7° 30``.
-(2/9)
=-{(1/9)+(1/9)}
=-{0.111...+0.111...}
=-0.222...
7/5 x 7/1 = 49/5 or 9 4/5
Answer:
4(k - 3)(3k + 5)
Step-by-step explanation:
Given
12k² - 16k - 60 ← factor out 4 from each term
= 4(3k² - 4k - 15) ← factor the quadratic
Consider the factors of the product of the coefficient of the k² term and the constant term which sum to give the coefficient of the k term
product = 3 × - 15 = - 45 , sum = - 4
Factors are - 9 and + 5
Use these factors to split the middle term
3k² - 9k + 5k - 15 → ( factor the first/second and third/fourth terms
= 3k(k - 3) + 5(k - 3) ← factor out (k - 3)
= (k - 3)(3k + 5)
Hence
12k² - 16k - 60 = 4(k - 3)(3k + 5) ← in factored form
