Answer: Its B
Step-by-step explanation:
I did this test and got it right
Answer:
17
Step-by-step explanation:
Using the law of cosines in ΔABC
b² = a² + c² - (2ac cosB) ← substitute in values
= 25² + 28² - (2 × 25 × 28 × cos36.9°)
= 625 + 784 - 1400 cos36.9°
= 1409 - 1400 cos36.9° ( Take the square root of both sides )
b = ≈ 17 ( nearest whole number )
(8x-5)(2x+1)
Check: 16x^2+8x-10x-5
16x^2-2x-5
If you make both of the denominators the same this can be a lot simpler.
1 1/2 divided by 1/4
1 2/4 divided by 1/4
6/4 divided by 1/4
How many times does 1/4 go into 6/4?
6
Hope this helps :)