Answer:
The sampling used by Britney is stratified sampling.
Step-by-step explanation:
The type of sampling used is stratified sampling.
In stratified sampling the population is divided into groups by the researcher.
Stratified sampling has the advantage that the researcher can reduce or the sample size to get results that meet a certain precision or increase the sample size to get results that are more accurate.
In the given case the the day is first divided into three parts: morning, afternoon and evening.
Then in each part is again divided into two randomly selected times during each part of the day in which she measures her mood.
Y=x2
Y=the answer
X= Mai skated
X2= Mai’s distance times 2 equals Clare’s distance
Answer:
-6x^4-8x^2 or -2x^2(3x^2+4)
Step-by-step explanation:
Given expression is:
In order to write the expression in simplest form we have to multiply the terms which needs to be multiplied.
So,
Combining alike terms
Can also be written as:
Answer:
x = 28⁰
Step-by-step explanation:
sum of the angles of a triangle = 180⁰
∠A + ∠B + ∠C = 180⁰
∠A = 5x - 60⁰
∠B = 2x + 40⁰
∠C = 3x - 80⁰
<h2>:- Solution</h2>
∠A + ∠B + ∠C = 180⁰
5x - 60 + 2x + 40 + 3x - 80 = 180⁰
5x + 2x + 3x - 60 + 40 - 80 = 180⁰
10x - 20 - 80 = 180⁰
10x - 100 = 180⁰
10x = 180 + 100⁰
10x = 280⁰
x = 280⁰/10
x = 28
_______________________
Answer:
send me link
Step-by-step explanation:
i need link to help