-3+(-2)= -5
-5+ 3i + 3i =
-5 + 6i
Answer:
Step-by-step explanation:
Given the following scores 3, 7 and 2, we are to find the expression Σ2X-2 and Σ(X-1)²
The value of X's are 3, 7 and 2. Substituting the values we will have;
Σ2X-2 = [2(3)+2(7)+2(2)] - 2
Σ2X-2 = (6+14+4) - 2
Σ2X-2 = 24-2
Σ2X-2 = 22
For Σ(X-1)²
Σ(X-1)² = (3-1)²+ (7-1)² + (2-1)²
Σ(X-1)² = 2²+6²+1²
Σ(X-1)² = 4+ 36+1
Σ(X-1)² = 41
<span>Divide the US into groups, by state. For cluster sampling, randomly choose twenty states and use the population of those states as the sample. For stratified sampling, randomly choose 10,000 people from every state as the sample.</span>
Answer:
The simplified ratio is<em> 7:6</em>
Step-by-step explanation:
First we have to find the <em>GCF</em> of <em>both 154 and 132</em>. Since the <em>GCF is 22</em>, we will <em>divide 154 by 22</em> and we get<em> 7</em>. Now <em>divide 132 by 22 </em>and we get <em>6.</em> Therefore, the simplest form or the ratio 154:132 is <em>7:6.</em>
7x+10y=6400
x+y=700
x=700-y
7(700-y)+10y=6400
4900-7y+10y=6400
-7y+10y=1500
3y=1500
y=500
x=700-y
x=700-500
x=200
there were 200 children and 500 adults at the show
