How do you know if the parabola has a maximum or minimum? (Multiple choice answer.) a. If the 'B' is positive, it has a maximum. If the 'B' is negative, it has a minimum.
b. If the 'B' is positive, it has a minimum. If the 'B' is negative, it has a maximum.
c. If the 'A' is positive, it has a maximum. If the 'A' is negative, it has a minimum.
d. If the 'A' is positive, it has a minimum. If the 'A' is negative it has a maximum.

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

answer:   y=2x-3

step-by-step explanation:

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