John can eat 10 cookies in 1/2 hr how many cookies can he eat in 45 minutes make a proportion and solve

x = 15 cookies

Step-by-step explanation:

A proportion is the same as setting up equivalent ratios or fractions.   Since John can eat 10 cookies in half an hour (30 minutes) the first ratio is:

So, John can eat one (1) cookie every three (3) minutes.  To find out how many cookies he can eat in 45 minutes, we set up equivalent fractions where 'x' represents the number of cookies:

We can then use cross-multiplication and divide to solve for 'x':

30x = 450, divide both sides by 30: 30x/30 = 450/30 or x = 15 cookies.

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

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.