9514 1404 393
Answer:
88 square inches
Step-by-step explanation:
The figure can be divided into two congruent trapezoids, each with bases 7 and 4 inches, and height 8 inches. Then the total area is ...
A = 2(1/2)(b1 +b2)h
A = (7 +4)(8) = 88 . . . . square inches
Using the Law of Sines (sina/A=sinb/B=sinc/C for any triangle) we can say:
L/sin((180-90)/2)=12/sin90 (sin90=1)
L/sin45=12
L=12sin45 cm
L≈8.49cm (to nearest hundredth of a centimeter)
Answer:
A: 0.64
Step-by-step explanation:
16/25 as a decimal is .64.
Brailyest
Answer:
x = -.1715 ≈ - .172 or x = -5.83
Step-by-step explanation:
x² + 6x + 1 = 0
x² + 6x = -1
Complete the square Add to both sides (1/2 of the x-term, then square it.)
x² + 6x + 9 = -1 + 9
(x + 3)(x + 3) = 8
(x + 3)² = 8
=
x + 3 = ±
x = -3 ±
x = -3 + or x = -3 -
x = -.1715 ≈ - .172 or x = -5.83
The average of these numbers is nine tenths,
, or .9, however you would like to put it.