Answer:
Cost of 1 ft²: $7
Cost of 1 ft² of geranium: $6
Step-by-step explanation:
Let x be the cost of a ft² of grass
Let y be the cost of a ft² of geranium
13x + 9y = 145
4x + 12y = 100
x + 3y = 25
x = 25 - 3y
13(25 - 3y) + 9y = 145
325 - 39y + 9y = 145
180 = 30y
y = 6
x = 25 - 3(6)
x = 7
Answer:
40 students
Step-by-step explanation:
In this problem, one is given the ratio ( 8 : 3 ), since a ratio is another way of writing a fraction one can rewrite it as; (8) represent the number of students who want to learn about magnets, and (3) represents the number of students who want to learn about magic tricks.
In the problem, it is also given that 25 more students wanted to learn about magnets compared to magic tricks. If one uses the parameter (x) to represent the factor by which the fraction is reduced, then one can get the equation;
8x = 3x + 25
Use inverse operations to solve,
8x = 3x + 25
-3x
5x = 25
/5
x = 5
Substitute back in to find out how many students want to learn about magnets,
8x
= 8(5)
= 40
C=m/3.
This equation is saying the cost (c) equals the minutes (m) on the phone out of 3 people
The answer to this math problem is 3.06
Because we don't have any set numbers for x or y, I believe that the solution set for both equations are infinite.