Which phrase best defines a rhombus?

a.
a parallelogram with four congruent angles

b.
a parallelogram with four congruent sides

c.
a rectangle with four congruent sides

d.
a quadrilateral with no congruent sides

Can someone me with this? write an even number that has a 7 in the hundreds place, an odd number in the thousands place, and is a multiple of

Select the correct answer from the drop-down menu. this graph represents the inequality x+2< 4,2x> 3,x+6< 12,2x> 12

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).