There are 785 students in a senior class. there are 77 more females than males. how many male and female seniors are there?

Step-by-step explanation:

This means between males and females, there are 785 people in total. This can be expressed as

This can be expressed as

, because there 77 females more.

Then, we replace the second equation into the first one

Now, we use this value to find the other one

Therefore, there are 431 female students and 354 male students.

ok then what happened.

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.