Answer: each hospice costs $4 and each shrub costs $9
Step-by-step explanation:
Let x represent the cost of one hospice.
Let y represent the cost of one shrub.
Mike spent $71 on four hospice and seven Travis. This means that
4x + 7y = 71- - - - - - - - - - - - -1
Danielle spent $53 on 13 hospice and three shrubs. This means that
13x + 3y = 53- - - - - - - - - - - 2
Multiplying equation 1 by 13 and equation 2 by 4, it becomes
52x + 91y = 923
52x + 12y = 212
Subtracting, it becomes
79y = 711
y = 711/79
y = 9
Substituting y = 9 into equation 1, it becomes
4x + 7 × 9 = 71
4x + 63 = 71
4x = 71 - 63
4x = 8
x = 8/4 = 2
Answer:
9.9% to a decimal is 0.099
