It means, literally, "Your feet hurt you". As a question, this would come out as "do your feet hurt?" As a statement, "your feet hurt."
An algebraic expression is technically any mathematical form that contains a variable.
An expression is algebraic if it involves a finite combination of numbers and/or variables and algebraic operations (addition, subtraction, multiplication, division, or exponentiation [raising to a power]). Fractional exponentiation is equivalent to extracting a root. For example: sqr(9) = 9^(1/2) = 3.
Following are four examples of expressions:
5 + 2
[-b Â± (b2 - 4ac)^(1/2)]/2a
Equations contain an "=" (equals) sign. Expressions do not.
Two important types of equations are:
- linear equations : y = mx + b
- quadratic equations: y = ax2 + bx + c
Move the jet onto an small aircraft carrier, ferry, or other ship big enough to hold it. Paint a mark on the hull of the ship showing the water level. Then remove the jet. The ship will rise in the water.
Now load the ship with items of known weight (100 pound bales of cotton, whatever) until it sinks to exactly the line you painted on the hull. The total weight of the items will equal the weight of the jet.
Alternatively, you can save effort by computing the volume of the ship between the two water levels, and multiplying that by the density of water.
The second integer is 51. The integers are 50, 51, and 52, so therefore the second integer is 51. This problem can be solved using this method:
(x) + (x+1) + (x+2) = 153
3x + 3 = 153
3x = 150
x = 50
If x = 50, then (x+1) = 51, and (x+2) = 52.