Answer:
a₁ = 38
Step-by-step explanation:
Given AP, where:
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<h3>Solution</h3>
aₙ = a₁ + (n-1)d
- a₈ = a₁ + 7d = a₁ + 7*(-2) = a₁ - 14
- a₁₂ = a₁ + 11d = a₁ + 11*(-2) = a₁ - 22
8a₈ = 12a₁₂
- 8(a₁ - 14) = 12(a₁ - 22)
- 2(a₁ - 14) = 3(a₁ - 22)
- 2a₁ - 28 = 3a₁ - 66
- 3a₁ - 2a₁ = -28 + 66
- a₁ = 38
<u>Percentage equation:</u>
Current amount of money / Total amount of money
Total amount of money = 220
Amount of money spent = 35
Current amount of money = 220 - 35 = 185
185 / 220 = 0.840909.....
<h2>Tom has 84.09% left (to 2 d.p.)</h2>
Answer:
D
Step-by-step explanation:
we are given 54x + 4.99x + 7.95
we can simplify like terms
58.99x + 7.95
It is D because in C it says "the actual delivery charge is $58.98" which is not true. It states in the question that it is "$7.95 for delivery", so it has to be D
A rational number is any number that can be turned into a fraction....it can be negative or positive.
Therefore, -12/6 is a rational number
