Since b = c, the angles B and C are congruent.
180 - 45 = 135
135/2 = =67.5
A = 45
B = 67.5
C = 67.5
a = ?
b = 4
c = 4
Since we know two sides and all three angles, we can use the law of sines to find a.
b/sin B = a/sin A
4/(sin 67.5) = a/(sin 45)
a = 4(sin 45)/(sin 67.5)
a^2 = (4(sin 45)/(sin 67.5))^2
a^2 = 9.37
Here we use the property, angles opposite to equal sides are equal,
(5x+27)=(45+3x)
5x-3x=45-27
2x =18
x=18/2
x=9
Answer is D. x=9
Answer:
The two numbers are:
30 and 18
Step-by-step explanation:
a + b = 48
a - b = 12
From the first eq.
a = 48 - b
Replacing this last value in the second eq.
(48 - b) - b = 12
48 - 2b = 12
48 - 12 = 2b
36 = 2b
36/2 = b
18 = b
from the first eq.
a + 18 = 48
a = 48 - 18
a = 30
Check:
from the second eq.
a - b = 12
30 - 18 = 12
Answer:
3
Step-by-step explanation:
because 3x3= 9 and 4x3=12 and 5x3=15
The ratio of growth is 26.1/25.9 = 261/259
in x years the median age = 25.9 * (261/259)^x
in 2019 (after 10 years) = 25.9 * (261/259)^10 = 27.97