Gabriela is building a brick wall. each row of bricks is 6.5 cm tall except that the top row is 1 cm shorter because it has no mortar. she wants the wall to be 259 cm tall. which equation can we use to determine r, the number of rows of bricks gabriela needs in her wall?

The answer is B. 6.5r - 1 = 259

Step-by-step explanation:

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step-by-step explanation:

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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