If x

yz, and when y=-2, z=-3, x=30. when y=4, x=80. find z

Step-by-step explanation:

Given:

replacing the proportionality sign with a constant , we have :

substituting : , and into the equation , we have :

divide through by 6

substituting   into the equation , the equation becomes

To find the value of z , when y = 4 , x = 80 , we will substitute the values into the formula , we have :

dividing through by 20 , we have :

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.