Which types of numbers are dense

What is (28 + 7 + 6 + 3) x 1/2 show your work

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7