The diagram shows two right-angled triangles ABE and BCD. AE = 9.5 cm, BE = 5.7 cm and CD = 2.8 cm.
ABC = 90°.
9.5 cm
a) Calculate the size of angle x.
[3]
+
B
5.7 cm x
D!
2.8 cm
b) Calculate the length of BC.
[4]
+
Diagram not drawn to scale

Which system of linear inequalities is graphed? can somebody please

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)