Answer:
see explanation
Step-by-step explanation:
Assuming the fractions are being multiplied
Factorise the denominators of both fractions
x² - 3x - 10 = (x - 5)(x + 2)
x² + x - 12 = (x + 4)(x - 3)
The product can now be expressed as
× 
Cancel (x - 5) and (x + 2) on the numerators/ denominators, leaving
= 
Answer:
THE CORRECT ANSWER IS... A
Step-by-step explanation:
Answer:
honestly me why not lol
Step-by-step explanation:
Try this option (replace, pls, a↔θ):
rule: if a∈[0;90°], then cos(a)>0, sin(a)>0, sin(a/2)>0, cos(a/2)>0 and tg(a)>0.
1. for sin(a/2):
using 'cos(a)=1-2sin²(a/2)', ⇒
![sin \frac{a}{2}= \sqrt{ \frac{1-cos(a)}{2}}; [tex]sin \frac{a}{2}= \frac{3}{ \sqrt{34}} .](https://tex.z-dn.net/?f=sin%20%5Cfrac%7Ba%7D%7B2%7D%3D%20%5Csqrt%7B%20%5Cfrac%7B1-cos%28a%29%7D%7B2%7D%7D%3B%20%5Btex%5Dsin%20%5Cfrac%7Ba%7D%7B2%7D%3D%20%5Cfrac%7B3%7D%7B%20%5Csqrt%7B34%7D%7D%20.)
2. for sin(2a):
sin(2a)=2*sin(a)cos(a), where sin(a)=√(1-cos²(a))=15/17.
Answer:
16) 18.5 hours
Step-by-step explanation:
40gifts = 5hrs
40/5 = 8
8gifts = 1hr
148/8 = 18.5
In 18.5 hours, 148 gifts are wrapped.
hope this helps and is right. p.s. i really need brainliest :)
