Answer:
Step-by-step explanation:
<u>Use the law of cosines:</u>
- cos C = (a² + b² - c²)/(2ab)
<u>Apply to the given triangle and solve for x:</u>
- cos x = (52² + 48² - 70²)/(2*52*48)
- cos x = 108/4992
- cos x = 0.02163461538
- x = arccos 0.02163461538
- x = 88.76°
4x - 2y = 14
y = 1/2x - 1
4x - 2(1/2x - 1) = 14
4x - x +2 = 14
3x + 2 - 2 = 14 - 2
3x = 12
3x / 3 = 12/3
x = 4
2x = y -10
2x + 7 = 2y
y - 10 + 7 = 2y
y -y -10 + 7 = 2y - y
-3 = y
8x - 1/3 y = 0
12x + 3 = y
8x - 1/3y = 0
8x -1/3( 12x + 3) = 0
8x - 4x - 3 = 0
4x -3 + 3 = 0 + 3
4x / 4 = 3/4
x = 3/4
The first one means 85 ÷ 5 = 17
The second one means 39 ÷ 3 = 13
The third one means 82 ÷ 2 = 41
The fourth one means 90 ÷ 6 = 15
The fifth one means 80 ÷ 8 = 10
Given that the isosceles triangle has sides √45, √45 and x.
The triangle has a height of 3 units.
We need to determine the value of x.
<u>Value of x:</u>
The value of x can be determined using the formula,
Where b is the base of the triangle, a is the sides of the isosceles triangle and h is the height of the triangle.
Substituting 
, 
and 
in the above formula, we get;
Squaring the terms, we have;
Subtracting, we get;
Thus, the value of x is 12
Hence, Option B is the correct answer.
Area of a triangle is base x height divide by 2
26x9=234
234 divide by 2 is 117
