Answer: Angle B measures 70 degrees
Step-by-step explanation: One angle is given as 40 while the other two angles are yet unknown.
Remember that the sum of the interior angles in a triangle equals 180 degrees. In other words
Angle A + Angle B + Angle C = 180
Therefore
40 + (2x - 30) + (x + 20) = 180
40 + 2x - 30 + x + 20 = 180
By collecting like terms we have
40 - 30 + 20 + 2x + x = 180
30 + 3x = 180
Subtract 30 from both sides of the equation
3x = 150
Divide both sides of the equation by 3
x = 50
Having calculated x = 50 we can now compute the value of angle B as follows;
When x = 50,
2x - 30 becomes
2(50) - 30
= 100 - 30
= 70.
Angle B measures 70 degrees
The third answer is correct. If the area is 144, then s squared must equal 144. To find s, you find the square root of 144.
Answer:
it is A i could be wrong
Step-by-step explanation:
Answer:
X=5
Step-by-step explanation:
Look at the problem | y=15-3x
5×3 is 15.
y=0
15-15=0
Therefore that's the answer.
you're welcome, get better!! :D
Answer:
14. -53/89
15. 2 29/30
Step-by-step explanation:
Sum of
18/5+(-71/5)
=18/5-71/5
= 18-71/5
= -53/5
Difference between 18/5 and -71/5
=18/5-(-71/5)
=18/5+71/5
=18+71 /5
=89/5
Sum divided by difference
-53/5÷89/5
= -53/5×5/89
= -53/89
15.
1/2+1/3+1/5+x=4
15+10+6/30+x=4
31/30+x=4
31/30-4=x
31-120/30=x
89/30=x
2 29/30=x
