Answer:
4 is b 0.15
i think 5 is b
Step-by-step explanation:
i couldn't figure out the others "-u-
Twice the number n will be expressed as 2n. So, that will be in our final answer. In order to decrease the number by 6, we will subtract 6. So there will be a - 6 in our final answer. Together, this is 2n - 6, and that is the same as the second option. So, the second option is the correct one.
<u>Answer:</u>
3 and 60
<u>Step-by-step explanation:</u>
For the given proportions, 
, 3 and 60 are the extremes while 12 and 15 are the means.
To understand this, we can take a look at an example.
Suppose two ratios a:b and c:d are in proportion.Then it can be expressed as
:
Here, a and d are the extreme ends and b and c are the means.
General form is ax^2+bx+c, and to get there we need to factor using FOIL (First Outside Inside Last)
(2x-1)(x+5)
F (2x × x)= 2x^2
O (2x × 5) 10x
I (-1 × x) -x
L (-1 × 5) -5
now add them together
2x^2+10x-x-5
2×^2+9x-5
and because the equation is in the form
ax^2+bx+c b is equal to 9
The answer is 15 bc 10 times 5 is 15
