All categories

3 years ago

Is a systematic random sample valiad or not

Mathematics

1 answer:

babunello [35]3 years ago

8 0

Answer:

Step-by-step explanation: being random if the periodic interval is determined beforehand and the starting point is random

You might be interested in

Y=-x^2+2x+10 y=x+2 Substitution Need ASAP

aniked [119]

Answer:

$x_1=\frac{1+\sqrt{33} }{2},y_1=\frac{5+\sqrt{33} }{2}\\ \\ x_2=\frac{1-\sqrt{33} }{2},y_2=\frac{5-\sqrt{33} }{2}$

Explanation:

You must find the solution of the system using the substitution method.

System:

$y=-x^2+2x+10\\\\ y=x+2$

Substitute x+2 for y:

$x+2=y=-x^2+2x+10$

Pass all the terms to one side:

$x^2-2x+x+2-10\\ \\ x^2-x-8=0$

Use the quadratic formula to solve:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}\\ \\ x=\frac{-(-1)+/-\sqrt{(-1)^2-4(1)(-8)} }{2(1)}\\ \\ x=\frac{1+/-\sqrt{1+32} }{2}$

$x_1=\frac{1+\sqrt{33} }{2}\\ \\x_2=\frac{1-\sqrt{33} }{2}$

Use y = x + 2 to find the value of y:

$y_1=2+x_1=2+\frac{1+\sqrt{33} }{2}\\ \\y_1=\frac{5+\sqrt{33} }{2} \\\\y_2=2+x_2=2+\frac{1-\sqrt{33} }{2}\\ \\ y_2=\frac{5-\sqrt{33} }{2}$

6 0

3 years ago

What is the value of d? −5.5(d−2)=−12.1

Sveta_85 [38]

answer: $d = 4.2$

explanation:

$-5.5(d-2)=-12.1$ | distribute the -5.5 into the parentheses

$-5.5d + 11 = -12.1$ | subtract 11 and move it over to -12.1

$-5.5d = -23.1$ | divide by -5.5

$d = 4.2$ | final answer

hope this helps! ❤ from peachimin

8 0

3 years ago

Read 2 more answers

Linear equations

saw5 [17]

Answer:

Ethan started of with 246,000 Twitter followers

Step-by-step explanation: 12,000 x 4 = 48,000

48,000 + 198,000 = 246,000

3 0

3 years ago

A wedge of cheese in the shape of a triangular prism has lengths of 10 cm, 13 cm, and 13 cm for its triangular sides. The perpen

Rina8888 [55]

Answer:

480 cubic cm.

Step-by-step explanation:

We have been given that a wedge of cheese in he shape of a triangular prism has lengths of 10 cm, 13 cm, and 13 cm for its triangular sides. The perpendicular distance from the 10 cm side to the point of the wedge is 12 cm. The height of the wedge is 8 cm.

$\text{Volume of triangular prism}=\text{Base area*Height of the wedge}$