Answer:
Step-by-step explanation:
3^2+x^2=6^2
9+x=36
36-9=27
sqrt 27
x=5.2
-3x+ 4=1 and -12x -27=324
0.52 because 52/100 is better than 52/1000 and 52/10000
Answer:
Angle STR = 78°
Step-by-step explanation:
So, since line QS is a straight line, we know that it's 180°. We also know that angles QTR and STR both add up to 180°. That gives us an equation:
20x + 12 + 10x + 33 = 180
Combine like terms
30x + 45 = 180
Subtract 45 from both sides
30x = 135
Divide both sides by 30
x = 4.5
Now we know the value of x. We just need to plug it into angle STR's given value:
10(4.5) + 33 = angle STR
45 + 33 = angle STR
78° = angle STR
P(z < 3)
From the normal distribution table,
P(z < 3) = 0.9987
