Х+у= 9
2x – Зу = 8
someone plz solve

Step-by-step explanation:

Given,

x + y = 9

2x - 3y = 8

Using substitution method:

In this method , a variable is expressed in terms of another variable from one equation and it is substituted in the remaining equation.

Move y to right hand side and change it's sign

⇒⇔equation ( i )

Now, put the value of X from equation ( i )

⇒

Distribute 2 through the parentheses

⇒

Collect like terms

⇒

Move constant to right hand side and change it's sign

⇒

Calculate

⇒

Divide both sides of the equation by -5

⇒

Calculate

⇒

Now, Put the value of y in the equation ( i )

⇒

Calculate the difference

⇒

Hence, x = 7 and y = 2

The possible solution of the system is the ordered pair ( x , y )

---------------------------------------------------------

Check if the given ordered pair is the solution of the system of equation

⇒

⇒

Simplify the equalities

⇒

⇒

Since all of the equalities are true , the ordered pair is the solution of the system.

Hope I helped!

Best regards!!

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!