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
16% is .16
8/7=1.14
2/3= .67
11 rooted=3.316...
144 rooted=12
so the numbers in order are
8/7, 16%, 2/3, 11 rooted, 144 rooted
Hope this helped
P.S to convert fractions to decimals put them in calculator
Answer: $350 because you multiply 140 and 100 then divide 40
Answer:
The lateral area is equal to
Step-by-step explanation:
In this problem the lateral area is equal to the area of one equilateral triangle multiplied by
To find the area of one equilateral triangle calculate the height
The area of the triangle is equal to
we have
Applying the Pythagoras theorem
The area of one triangle is equal to
so
The lateral area is equal to
If it’s a square. Take the area and cube root it.
That gives us 7.
7 + the four sides the square has = 7 + 7 + 7 + 7
That equals 28.
The answer is B.