Can someone please help me ill give them brainliest awnser if its correct

it's also worth 20 pts

49 pi or 153.86

Step-by-step explanation:

The area of a circle can be found using

a=pi*r^2

We know the radius is 7 so we can substitute that in

a=pi*7^2

a=pi*49

The answer in terms of pi is 49pi units^2

For an exact answer, substitute 3.14 in for pi

a=pi*49

a=3.14*49

a=153.86

The area is also 153.86 units^2

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!