Line segment _ is part of Line _. Point _ is the vertex of angle PQR. QR, QS, Q QR, QP, R QP, QS, Q QS, QR, P

QR, QS, Q

Step-by-step explanation:

A line segment is simply a small part of a whole line. A line is drawn through at least two specified points. The vertex of an angle is the point at which the two sides of the angle meet.

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