Sketch the graph of 4x^2 + 25x-21 = y using your graphing calculator. What are the x-intercepts of this graph?
a. -3/4, 7
b. 3/4, -7
d. 3/4, -7
C.3/4,7

D OR B :) THATS ALL IMA SAY XD

Step-by-step explanation:

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

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