During one month, a blood donation center found that 45.5% of the donors had the a antigen. 14.2% of the donors had the b antigen. 4.9% of the donors had the a antigen and the b antigen. 84.6% of the donors were rh+. 87.9% of the donors had the b antigen or were rh+.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

y/x=18

step-by-step explanation:

answer: 1 and 3

step-by-step explanation: