Dans poubling and halving can be helpful when carrying out some calculations. You can halve one number and then double the result;
20 x 164 = 10 x 164 x 2 = 1640 x 2 = 3280.
You can partition the number and double part of it and halve its result:
32 x 15 = 32 x 10 + 32 x 10 = 2 = 320 + 320 : 2 = 320 + 160 = 480.
More difficult calcualtions can be made easier by doubling one number in the calculatia
and halving the result: 24 x 15 = 24. x 30 = 2 = 720 = 2 = 360.
To multiply by 50, multiply by 100 and halve the result. To multiply by 25, multiply by 100 a
divide the result by 4.​

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Suppose you are going to graph the data in the table. minutes temperature (°c) 0 -2 1 1 2 3 3 4 4 5 5 -4 6 2 7 -3 what data should be represented on each axis, and what should the axis increments be? x-axis: minutes in increments of 1; y-axis: temperature in increments of 5 x-axis: temperature in increments of 5; y-axis: minutes in increments of 1 x-axis: minutes in increments of 1; y-axis: temperature in increments of 1 x-axis: temperature in increments of 1; y-axis: minutes in increments of 5

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.