Answer:
x=20
Step-by-step explanation:
x-5=15
x=15+5
x=20
If you would like to know what percent of the total number of songs has Lani learned, you can calculate this using the following steps:
x% of 84 songs is 21 songs
x% * 84 = 21
x/100 * 84 = 21 /*100
x * 84 = 21 * 100 /84
x = 21 * 100 / 84
x = 25%
Result: Lani has learned 25% of 84 songs in her piano playbook.
Answer:
3 units right 1 unit up
Step-by-step explanation:
just observe one point that exactly the same on the new abcd and start from counting left/right then up/down
Answer:
A
The correct option is C
B
The value of z-test is
Step-by-step explanation:
From the question we are told that
The null hypothesis
The alternative hypothesis
The level of significance is
The sample proportion is
The sample size is n = 180
Generally from central limit theorem
if np and nq are > 5 then normal sampling distribution can be used
So
np = 180 * 0.22 = 39.6 > 5
and
nq = 180 * (1 -0.22) = 140.4 > 5
So normal sampling distribution can be used
Generally the z-test is mathematically represented as
=>
=>