The sum of three numbers is 185 The second number is 5 times the first.
The third number is 13 less than the second.
What is the second number?

The value of the first number, x, is equal to 18.

The value of the second number, y, is equal to 90.

The value of the third number, z, is equal to 77.

Step-by-step explanation:

x + y + z = 185

y = 5x

z = y - 13

Because we already have a value for y, we already have a value for z. We can now solve for a value of x.

x + 5x + 5x - 13 = 185

Add 13 to both sides.

x + 5x + 5x = 198

Combine like terms.

11x = 198

Divide both sides by 11.

x = 18

Because we have a value of x, we can solve for the exact values of y and z.

y = 5(18)

y = 90

z = (90) - 13

z = 77

Hope This Helps!

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.