Answer:
Step-by-step explanation:
8 1/2
Answer:
Area = 18
Step-by-step explanation:
Since the triangles are similar, we can set up a proportion of 10/4.5 = 40/x. The sides on top, with length 10 and 4.5, are similar. This ratio can then be applied to the areas, with the area of rectangle T in the numerator and the area of rectangle U in the denominator, giving us 40/x. To solve for x, we can multiply 40 by 4.5 and then divide the product by 10. This gives us 18, the area of rectangle U.
The y-int. is found by setting x = 0: 3(0) + 2y = 7, or 2y = 7, or y = 7/2.
So the y-intercept is (0,7/2). You could also write "b=7/2."