The lengths of the sides of a triangle are x,2x and 2x centimetres. If the perimeter is 20 centimeters, what is the value of x? a)4
b)5
c)8
d)10​

351.23

step-by-step explanation:

21/58.

hope to be marked brainliest

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363