Answer:
9:12
Step-by-step explanation:
since the others are multiples of 2:3
but 9:12 is not a multiple
You can use F.O.I.L. for this, which if you don't know stands for first outer inner last, so multiply the first in each parentheses, then the outer, then the inner, then the last. yours would be 3*5+3*√7+(-√7)*5+(-√7)*√7 => 15+3√7-5√7-7 => 8-2√7
Final answer:
8-2√7
Hope I could help :)
Since this is a right triangle, a triangle with a 90 degree-angle, we can use the trigonometric functions. An example would be the sine function. With respect to the angle, it has the opposite side (o), the adjacent side (a), and the longest side called hypotenuse (h). For the sine function, it would be sine theta = opposite/hypotenuse. Using this relationship,
sin 38 = BC/5
BC = 5*sin38
BC = 3.08 units
<u>Answer:</u>
The correct answer option is B.
.
<u>Step-by-step explanation:</u>
The following is the formula that is used to find the sum of a geometric progession:
![S _ n = a _ 1 [ \frac { 1 - r ^ n } { 1 - r } ]](https://tex.z-dn.net/?f=%20S%20_%20n%20%3D%20a%20_%201%20%5B%20%5Cfrac%20%7B%201%20-%20r%20%5E%20n%20%7D%20%7B%201%20-%20r%20%7D%20%5D%20)
where
is the sum,
is the first term,
is the common ratio while
is the number of terms.