12 hundreds+8 tens+7 ones =
12*100 + 8*10 + 7*1 =
1200 + 80 + 7 =
1287 ← answer
Answer: The answer is -5
Step-by-step explanation:
4x - 3 = 6x + 7
- 7 -7
4x - 10 = 6x
-4x -4x
-10 = 2x
---------------
2
-5 = x
Using Pythagorean Theorem, you can find that the diagonal pipe would have to be 17 feet long to bisect the yard. sqrt(8^2+15^2)=17
The vertex angle bisector divides the triangle into two congruent right triangles. The sine of half of the vertex angle will be half of the base divided by the side (from the definition of the sine of an angle). Then the total vertex angle is ...
α = 2×arcsin(3.5/5) ≈ 88.9°
_____
Using the Law of Cosines, the vertex angle can be found as
arccos((7^2 -5^2 -5^2)/(-2*5*5)) = arccos(1/50) ≈ 88.9°
The answer is0.4/1.0.good luck
