Question

can you please answer it​

Answer 1

Answer:

7) true 8)false  9)true 10)true  11)false 12)true

Step-by-step explanation:

7) the two digit number will be in the form of 10x+y

here,x in tens place and y is in unit place

Given, 7 in ten place 7*10=70

according to question, after summing digits 8 will be at unit place

hence,78      

8)the sum of natural numbers from 1 to 100 invented by Gauss

9) will be attached

10)perimeter is circle equal to that of square

   perimeter of the circle is 2*π*r

   perimeter of square is 4a

   2*π*r=4*a

By solving above equation,

   r/a=7/11

Area of circle is π*r^2

Area of square a^2

their ratios,

        π*r^2  / a^2 =(22/7)*7*7/11*11=>14/11

11)the probability of leap of 53 weeks can be done in 400 years

12) product of zeros of x^2-4*x+3

    Product of zero= - constant term/coefficient of x^2=>-3/1=>(-3)

Brainliest my solutions