Answer:
x = 57 y = 137
Step-by-step explanation:
x + 43 + 90 = 180
x + 43 + 90 - 90 = 180 - 90
x + 43 = 90
x + 43 - 43 = 90 - 43
x = 57
43 + y = 180
43 + y - 43 = 180 - 43
y = 137
Yes you are doing it right
C = 19.99 + 0.15x
1️⃣ C = 0.15(78) + 19.99
2️⃣ C = 11.7 + 19.99
3️⃣ C = 31.69
4️⃣ The total cost is $31.69
5️⃣ The cost to send 78 text messages is $11.70
♡´･ᴗ･`♡Brainliest Please♡´･ᴗ･`♡
Given:
mean, μ = 11 lb
Std. deviation, σ = 2.1
Let x = the weight that separates the top 5% of the crop.
The z-score is
z = (x - μ)/σ
= (x - 11)/2.1
From standard z-table for normal distribution,
P(z=1.645) = 0.95
Therefore
(x - 11)/2.1 = 1.645
x - 11 = 1.645/2.1 = 0.7833
x = 11.783
Answer: 11.8 lb (nearest tenth)
