Which situation can be represented by the equation y= 13x? A- A bakery sells. x number of cakes for $13.00 each. The cost is y, for x number of cakes.

B-Sandra has been in ballet for x years. This is 13 times y, the number of years her mother has done ballet.

C-Tom is x, xears old. His age. is 13 years greater than y, his brother's age in years.

D-John spent x dollars to buy a purse for his sister. He gave the cashier y dollars and
received $13 back in change.

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

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

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).

570, the answer is 570, hope it