Let's solve this problem step-by-step.
STEP-BY-STEP SOLUTION:
We will be using simultaneous equations to solve this problem.
Let's establish the two equations we will be using to solve the problem.
Let Andrew's current age = a
Let Andrew's son's current age = s
Equation No. 1 -
a = 3s
Equation No. 2 -
a - 10 = 5s
To begin with, we will substitute the value of ( a ) from the first equation into the second equation to solve for ( s ).
Equation No. 2 -
a - 10 = 5s
( 3s ) - 10 = 5s
3s - 5s = 10
- 2s = 10
s = 10 / - 2
s = - 5
Next we will substitute the value of ( s ) from the second equation into the first equation to solve for ( a ).
Equation No. 1 -
a = 3s
a = 3 ( - 5 )
a = - 15
FINAL ANSWER:
Therefore, the present age of Andrew is - 15 and the present age of Andrew's son's is - 5.
It isn't possible for someone to be negative years old, but this is the answer that I ibtained from the equations.
Hope this helps! :)
Have a lovely day! <3
1. 4.625
2. 0.708
3. 8.75
4. -3.16
Hope it helps~
In Q.2 is it 22/3-11/8 or 2/3-11/8?
In Q.4 is it 41/3-21/6 or 1/3-21/6?
Answer:
C. f(t) = 5000(1.09)^t
Step-by-step explanation:
Compound interest formula:
F = P(1 + r)^t
Answer: C. f(t) = 5000(1.09)^t
<h2>15 58</h2>
Step-by-step explanation:
BD = DC = 1/2 BC ---> AD is median ( because in equilateral triangle altitude equals to median )
so, therefore
AB = 18 (given)
BD = 1/2 BC
BD = 1/2 × 18
BD = 9
AB² = AD² + BD² ---( by pythagoras theorm)
18² = AD² + 9²
324 = AD² + 81
324 - 81 = AD²
243 = AD²
then,
AD = √243
AD = 15 58
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