Answer:
49.5
Step-by-step explanation:
90% of 55 is 49.5
Answer:
x=67
y=113
z=50
Step-by-step explanation:
x=180-28-85=67
y=180-67=113
z=17+113=50
Answer:
y=6-3x
Step-by-step explanation:
factor out common terms 2(3x+y)=12divide both sides by 2
3x+y= simplify 3x+y=6 subtract 3 from both sides
y=6-3x
Answer: his score 131 points
Step-by-step explanation:
Assuming the scores in the standardized test are normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = standardized test scores.
µ = mean score
σ = standard deviation
From the information given,
µ = 110 points
σ = 10 points
Looking at the normal distribution table, the z score that corresponds to the 98 percentile is 2.06
2.06 = (x - 110)/10
Cross multiplying, it becomes
2.06 × 10 = x - 110
2.06 = x - 110
x = 20.6 + 110
x = 130.6
Approximately, x = 131
Whats the question? not really understanding what your asking?