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alekssr [168]
3 years ago
14

Harold is twice as old as Jack, who is three years older than Dan. If Harold's age is five times Dan's age, how old in years is

Jack?
Mathematics
2 answers:
never [62]3 years ago
4 0
Dan's age is x.
Jack is three years older than Dan, so his age is x+3.
Harold is twice as old as Jack, so his age is 2(x+3).

Harold's age is five times Dan's age.
2(x+3)=5x \\
2x+6=5x \\
6=5x-2x \\
6=3x \\
\frac{6}{3}=x \\
x=2 \\ \\
x+3=2+3=5

Jack is 5 years old.
Kay [80]3 years ago
4 0

Answer:

he is 5 yrs old.

Step-by-step explanation:

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We are interested in the dimensions of a certain square. A rectangle has a length of 5 units more than the side of the square an
JulijaS [17]
Lets consider the side of square be 'x' units
So as per data,
Length of rectangle is x+5
Breadth of rectangle is x/2

and also as per data, the areas of rectangle and square are equal.
Area of rectangle = Length * Breadth = (x+5)*x/2 = ( x^{2} +5x)/2 <- equation1
Area of square = Side* Side= x*x = x^{2}  <- equation2

As per given data, Equation1 and equation 2 are equal
so 
( x^{2} +5x)/2 = tex] x^{2} [/tex]  
x^{2} +5x = 2 x^{2}
2 x^{2} -  x^{2}   = 5x
x^{2}  = 5x
x = 5

So the side of square = 5 units  

For Square, both dimensions are equal.




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3 years ago
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Given f(x) = 3x + 2 and g(x) = -2x – 4, find h(x) = f(x) – g(x).
Nastasia [14]

Answer:

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x -2

because add the like terms

-4 and 2

-2

3x and -2x

x

x = -2 so A

Step-by-step explanation:

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We need to substitute these problem you can take first one to understand
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Paha777 [63]
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