Answer:
Step-by-step explanation:
because <u>c</u> is shorter than<u> a</u> we know C is a smaller angle than A
so the first choice is out.
use the law of cosines to find b
= 
=1681+400-1326.787871
= 754.21219
b= 
b= 27.46292
so the last choice looks good
Answer:
$87.60
Step-by-step explanation:
Assuming that mary is on a fixed income rate, we can calculate that Mary is making approximately $5.84 per week.
17.50 / 3 = 5.833333.... -> <em>5.84</em>
Now we multiply this number by 15 to get the amount of money she saves over this time.
5.84 * 15 = <em>87.6</em>
<em>So, we can see that Mary has saved $87.60 in 15 weeks.</em>
Answer:
12
Step-by-step explanation:
2xy+15x
Let x=4 and y= -9
2(-4)(-9) + 15(-4)
Multiply
72 -60
Subtract
12