Questions in mathematics

Questions in mathematics

[Done] Find all values of \(\theta\) between 0 and 360 degrees that satisfy \(\cos(\theta) = -0.73\).

[Done] Which expression is equivalent to \((-2)(a+6)\)? A. \(-2a+6\) B. \(2a+12\) C. \(-2a-12\) D. \(-2a+12\)

[Done] Convert 4.3 kilograms to centigrams using dimensional analysis.

[Done] Identify the set as finite or infinite. {1, 1/4, 1/16, 1/64, ...} A. Finite B. Infinite Can someone explain this one for me?

[Done] Water tank A has a capacity of 550 gallons and is 66 percent full. Water tank B is 53 percent full. The ratio of the capacity of tank A to tank B is 11:15. A. How much water is in tank A? B. What is the capacity of tank B? C. How much water is in tank B?

[Done] One twelfth of the circle is 30 degrees. How many radians is one twelfth of the circle?

[Done] If a rectangle with a perimeter of 48 inches is equal in area to a right triangle with legs of 12 inches and 24 inches, what is the rectangle’s diagonal?

[Done] A 5-foot ladder is leaning against a 4-foot wall. How far must the bottom of the ladder be from the base of the wall so that the top of the ladder rests on the top of the wall?

[Done] For all x, what is \((3x + 7)^2\)? A. \(6x + 14\) B. \(6x^2 + 14\) C. \(9x^2 + 49\) D. \(9x^2 + 21x + 49\) E. \(9x^2 + 42x + 49\) Can anyone explain how to solve it step by step?

[Done] Evaluate [tex]a^2 + ab - b^2 + 5[/tex] when [tex]a = 2[/tex] and [tex]b = 3[/tex].