What is the solution to the following system of equations? y = −x^2 − 5x − 4 y = −x^2 + 9x − 18

X=1   Y= -10

Step-by-step explanation:

equation 2

using equation 1, we substitute in equation 2

We have

so, we substitute the X value in equation2

we have>

ab: 2 n83b8eb7ebi. 8e yen in

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places