9514 1404 393
Answer:
obtuse
Step-by-step explanation:
The law of cosines tells you ...
b² = a² +c² -2ac·cos(B)
Substituting for a²+c² using the given equation, we have ...
b² = b²·cos(B)² -2ac·cos(B)
We can subtract b² to get a quadratic in standard form for cos(B).
b²·cos(B)² -2ac·cos(B) -b² = 0
Solving this using the quadratic formula gives ...

The fraction ac/b² is always positive, so the term on the right (the square root) is always greater than 1. The value of cos(B) cannot be greater than 1, so the only viable value for cos(B) is ...

The value of the radical is necessarily greater than ac/b², so cos(B) is necessarily negative. When cos(B) < 0, B > 90°. The triangle is obtuse.
Area is equal to length times width, so we can use this over here:
Area = lw
Area = (x+7)(x+1)
Area = x^2+x+7x+7
Area = x^2+8x+7
Hope this helps!! :)
Answer:
0.224
Step-by-step explanation:
2/5% = 0.004
22% = 0.22
22% + 2/5% = 0.224
Answer:
a).no sugar=1. flour=3 1/2
B). sugar= 1 1/2. Flour= 5 1/4
c) your just simplifying to the smallest possible number
Step-by-step explanation:
1/2 doubled= 1 (1/2+1\2)
1 3/4= 7/4
7/4 doubled= 14/4=3 2/4= 3 1/2(1 1/3+1 1/3)
Answer:
480 students are transported to school each day.
Step-by-step explanation:
Since there are 12 buses and each one of them transports 40 students that means that the total amount of students will be equal to...
12 x 40 = 480