8) So remember the sum of all angles inside a triangle is equal to 180°. We first want to figure out the angle below the 110°.
A straight line is 180° so if we do 180 - 110 we get 70° therefore the angle below the 110° is 70°.
So we now know two angles in the triangle, 70° and 80°. Add these and we get 150°. Now we can determine the final angle (the one labelled (2x - 6)) which will be 30°.
So let’s make it into an equation:
2x - 6 = 30
Add 6 to both sides to isolate 2x:
2x = 36
Divide by 2 to get the value of x:
x = 18
10) Since the sum of all angles in a triangle is 180, and there are only 3 angles, we can determine A easily.
B = 10°
C = 160°
So to determine A:
180 - 160 - 10
Which gives us 10
Therefore A = 10°.
So the answers:
8) x = 18
9) A = 10°
I hope this helps you!!
30% of £10 = £3
30% discount = £10 - £3 = £7
Cake costs £7
To solve we first need to simplify the equation
3^2 [5 + ( 2 - 4)^2] - 15 is simplified to (3^2)(5 + (2 - 4) ^2] - 15
After you reduce (3^2)(5 + (2 - 4) ^2] - 15 you get 66
The answer is <span>3^2 [5+ (2-4)^2} - 15 = 66
Hope that helps! - Alyssa ;)
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