Ascale drawing is made to enlarge a picture by using a scale factor of 3. the enlarged picture is 9 inches by 15 inches. what are the dimensions of the original picture? a. 3 inches by 5 inches b. 3 inches by 15 inches c. 6 inches by 12 inches d. 27 inches by 45 inches

Option A by

Step-by-step explanation:

we know that

To find the measures of the original picture divide the dimensions of the enlarged picture by the scale factor

we have

The scale factor is equal to

The dimensions of the enlarged picture are by

Divide by

The dimensions of the original picture are by

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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