Answer:
Im thinking 12 im so sorry if its wrong!
Step-by-step explanation:
Answer:
x = 5 ± 
Step-by-step explanation:
Given
x² - 10x + 25 = 17 ← left side is a perfect square, thus
(x - 5)² = 17 ( take the square root of both sides )
x - 5 = ± ( add 5 to both sides )
x = 5 ±
Thus
x = 5 -
x = 5 +
Answer:
The three angles of the right-angled triangle are
a = 35°
b = 90°
c = 55°
Step-by-step explanation:
We are given the ratio of angles of a right-angled triangle
a:b:c = 7:18:11
Recall that the sum of interior angles in a right-angled triangle is always 180°
7x + 18x + 11x = 180
36x = 180
x = 180/36
x = 5
a:b:c = 7x:18x:11x
a:b:c = 7(5):18(5):11(5)
a:b:c = 35:90:55
a = 35°
b = 90°
c = 55°
Alternatively:
We are given that the smallest angle is 35°
a = 7x = 35
x = 35/7
x = 5
b = 18x
b = 18(5)
b = 90°
c = 11x
c = 11(5)
c = 55°
The two equations are scale factors, to find the missing number, divide the equations by each other.
36 ÷ 4 = 9.
The scale factor is 9, so multiply 5 by 9 to find b.
5 × 9 = 45.
B = 45.
I hope that helps!
The answer is B : 720
If you want to learn more on HOW to do this , message me :) !
