The sum of two numbers is 23.6 one is four times the other. find the numbers

4.72 and 18.88

Step-by-step explanation:

The sum of two numbers is 23.6 one is four times the other.

Let the numbers be x and 4x.

So,

x + 4x = 23.6

=> 5x = 23.6

=> x = 23.6/5

=> x = 4.72

The numbers are,

x and 4x.

= 4.72 and 4(4.72)

= 4.72 and 18.88

So, the two numbers are 4.72 and 18.88.

he earned 78.75 in interest.

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct