Answer:
The number of bicycles in the store is 
Step-by-step explanation:
Let
x------> the number of bicycles
y-----> the number of tricycles
we know that
The bicycles has two wheels and the tricycles has three wheels
so
------> equation A
------> equation B
substitute equation B in equation A and solve for y
Find the value of x

Answer:
Part 1) 
Part 2) 
Part 3) 
Part 4) 
Step-by-step explanation:
step 1
Find the measure of angle C
we know that
The triangle ABC is a right triangle
so
Angle C is a right angle
therefore

step 2
Fin the measure of angle A
we know that
In the right triangle ABC
∠B+∠A=90° -----> by complementary angles
we have

substitute


step 3
Find the length side b
we know that
In the right triangle ABC


substitute the given values

step 4
Find the length side a
we know that
In the right triangle ABC


substitute the given values

One equation that you could make is 5+2-(-3)
5/8 well u just do cross simply