Arectangular pyramid is sliced so the cross section is perpendicular to its base and passes through its vertex. what is the shape of the cross section? square triangle trapezoid rectangle

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Measures of the angle of r, 31 s (x+4) t (3x+9)

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.