Forming and solving equation
a) rectangle a has one side which is 6cm long and the other is (x+2)cm long. rectangle b has sides of length (2x+1) and 3cm. if the perimeters are the same, calculate the value x and hence, the lengths of the sides of the rectangles

b) rectangle x measures 7cm by (x+1)cm. rectangle y has dimensions of (3x+6)cm and 4cm. the area of rectangle x is half the area of rectangle y. calculate the lengths of the sides of the rectangles, and hence, their areas

c) adam has sticks of the following lengths: (3x+4)cm (2x+10)cm (x+12)cm
he puts all 3 sticks together to make a triangle. the triangle is isosceles. calculate the 3 possible values of x

all working out

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

Drag each expression to the correct location on the solution. not all expressions will be used. consider the polynomial 8x + 2x2 - 20x - 5. factor by grouping to write the polynomial in factored form.