11. There are 300 and 250 cows on Farms A and B respectively. How many cows from Farm A must be transferred to Farm B so that the
number of cows on Farm B is four times the number of cows on
Farm A?

190

Step-by-step explanation:

we want 1/5 on farm A and 4/5 of cows on farm B.

110 cows is 1/5. 550-110=440 and 440 is 4/5.

we want 110 cows on farm A and 440 on farm B.

So, there already is 250 cows on farm B and we need to move 440-250=190 cows from farm A to farm B.

And you can check that 4*110=440

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!