Answer:
$10.5 and $7.75
Step-by-step explanation:
Let Landon's hourly rate at babysitting job be and at water park be
now, for the first week Landon babysat for 3 hours and worked at the water park for 10 hours and made 109$.
⇒ ....(1)
Next week Landon babysat for 8 hours and worked at the water park for 12 hours and made 177$.
⇒ ....(2)
From equation (2) we get
....(3)
Substituting value of from equation (3) to equation (1) we get
Using value of x in equation (1) we get
Hence hourly rate for Landon for babysitting job is $10.5 and for water park job is $7.75
Answer:
x ≈ 2.57
Step-by-step explanation:
Δ ACB and Δ AED are similar, thus the ratios of corresponding sides are equal, that is
= , substitute values
= ( cross- multiply )
7x = 18 ( divide both sides by 7 )
x = ≈ 2.57 ( to 2 dec. places )
Answer:
The decision rule is
Reject the null hypothesis
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is n = 160
The sample mean is
The variance is
The level of significance is
The null hypothesis is
The alternative hypothesis is
Generally the standard deviation is mathematically represented as
=>
=>
Generally the test statistics is mathematically represented as
=>
=>
From the z table the area under the normal curve to the left corresponding to 2.53 is
From the value obtained we see that the hence
The decision rule is
Reject the null hypothesis
The conclusion is
There is sufficient evidence to conclude that the believe that the valve performs above the specifications is true
Answer:
Second option
Step-by-step explanation:
It's subtraction
Answer:
all of them are 180 :)
Step-by-step explanation: