Miss Bloom's 5 $45.30 on art supplies if she turns 7% tax how much total money did she spend

Miss Bloom spent $48.47 in total

Step-by-step explanation:

turn 7% into a decimal --> 0.07

multiply the cost of art supplies by the tax % (in decimal form)

45.30(0.07) = 3.171

add 3.171 to the original cost of art supplies

45.30 + 3.171 = 48.471

round to the nearest hundreths place (since money typically only has 2 decimal places)

48.471 --> 48.47

therefore, miss bloom spent $48.47 in total

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

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)