Which equations are true? Select all that apply.
16x2 – 64y2 = (4x – 8y)(4x + 8y)
16x2 – 18y2 = (8x – 9y) (8x + 9y)
O 22 – 169 = (x – 13)(x + 13)
2522 – 12 = (5x – 6)(5x + 6)
9x2 – 1 = (3x - 1)(3x + 1)

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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b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13