The sophomore class holds a car wash to raise money. A local merchant donated all of the supplies. A wash cost $5 per car and $6:50 per van or truck. Write an equation in standard form to relate the number of cars and vans or trucks the students must wash to raise $800.

  10c +13v = 1600

Step-by-step explanation:

Let c and v represent the numbers of cars and vans that must be washed. To raise exactly $800, the values of c and v must satisfy ...

  5c + 6.5v = 800

To put this in standard form, we must make the second coefficient an integer. We can do that by multiplying by 2.

  10c +13v = 1600

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.