Sally has 56 stamps. sarah has 3 times as many stamps as sally. their brother , peter has 45 stamps less than sarah. how many stamps does peter have?

peter will have 123 stamps.

Step-by-step explanation:

This is because 53 times 3 is 159. Sarah has 159 stamps. Subtract 45 from 159 and you will get 123.

Step-by-step explanation:

123 I believe

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