Answer: Alvin = 42 yrs , Elga = 21 yrs
Step-by-step explanation:
Let Elga's age be x , and Alvin's age be y ,since Alvin is two times Elga's age , then
Alvin's age = 2x , that is
y = 2x ............... equation 1
The sum of their ages is 63 implies
x + y = 63 .............. equation 2
Solving the resulting linear equations by substitution method.
Substitute equation 1 into equation 2 , we have
x + 2x = 63
3x = 63
x = 63/3
x = 21
Therefore : Elga is 21 years old , then Alvin will be 21 x 2, which will be 42
Here is the correct answer of the given polynomial above. The answer is [(-3x^2)+(-8x^2)]+4x+[9+5]. The expression that can be used to find the sum of the polynomials given above is [(-3x^2)+(-8x^2)]+4x+[9+5].
Answer:
the answer is 134
Step-by-step explanation:
for area u need to cut the object into a cut Wich I did 5 times two and 14 times 16 then I multiplied the two number of each set then added 124 and 10 to get 134
1 9/10 because 1 whole is equal to one and 0.9 is equal to 9/10. Try reading it out to your self.
The CD usually sells for $18.00, and of this price is 10% off, so you would want to first find out 10% of $18.00 is, and subtract that from $18.00
10% of 18.00 is 1.8, so:
$18.00 - 1.8 = $16.20
$16.20 is the price of the CD after a 10% off discount, but you still want to find out the total price with the sales tax.
To find the tax, find 8% of $16.20, and add that amount to $16.20
So:
8% of $16.20 is $1.30
Add $16.20 + $1.30 = $17.50
Thus your final answer is $17.50, which is the total price of the CD, including tax.
