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14 plus x 21 solve for x?
The letter X in the equation 14 plus X21 would be 2.5. this is a math problem.
21 x21 equals 7 x7 x?
21x21 equals 7x7x9
21 equals 5x plus 3x plus 5?
Subtract 5 from each side: 16 = 5x + 3x ie 16 = 8xDivide each side by 8: 2 = x21 = 5x + 3x + 521 - 5 = 8x16 = 8x16/2 = x2 = xx = 2Check:21 = 5(2) + 3(2) + 521 = 10 + 6 + 521 = 21
What is 8 times table?
8x1= 8x2=16 x3=24 x4=32 x5=40 x6=48 x7=56 x8=64 x9=72 x10=80 x11=88 x12=96 x13=104 x14=112 x15=120 x16=128 x17=136 x18=144 x19=152 x20=160 x21=168
How many yards of cement do you need for a 20.5 x 21 x 4 slab?
About .0369 cubic yards. 20.5"x21"x4"=1722 cubic inches 1 Cubic yard of concrete is 27 cubic feet (9'x9'x9') 1 cubic foot of concrete is 1728 cubic inches (12"x12"x12") 1 cubic yard = 27 x 1728 = 46656 cubic inches 1722/46656 is approximately .0369 This would be a little less than two 80# bags of concrete mix
