Janine wishes to conduct a poll to predict how many students will vote for her for class president. Which polling methods are likely to be biased? Choose all answers that are correct. A. Five people in each of Janine’s classes are selected and asked for whom they intend to vote. B. From a list of all students in Janine’s grade, 25 students are selected at random and asked for whom they intend to vote. C. Every 10th student from a list of all students in Janine’s grade is selected and asked for whom the student intends to vote. D. Janine chooses 5 of her friends and asks each to select another 5 students. These 25 students are asked for whom they intend to vote.

Answers

Answer 1

Answer: D since she is asking her friends who are just going to ask their friends
A. since only 5 are asked

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For the equation y = 3x2 − 4x + 11, choose the correct application of the quadratic formula. x equals four plus or minus the square root of negative four squared minus four times three times eleven, all divided by two ti x equals negative four plus or minus the square root of negative four squared minus four times three times eleven, all divided x equals negative three plus or minus the square root of three squared minus four times negative four times eleven, all divided x equals three plus or minus the square root of three squared minus four times negative four times eleven, all divided by two t

Answers

y = 3x² - 4x + 11
0 = 3x² - 4x + 11
x = -(-4) ± √((-4)² - 4(13)(11))
2(3)
x = 4 ± √(16 - 4(143))
6
x = 4 ± √(16 - 572)
6
x = 4 ± √(556)
6
x = 4 ± 2√(139)
6
x = 2 ± √(139)
3

Answer:

What he said below was that it was your second choice

(hope this helps or at least thats what i got from it)

What is the solution of the system of equations c+3d=8 and c=4d-6?
Show work plz.

Answers

$\left\{\begin{array}{ccc}c+3d=8\nc=4d-6\end{array}\right\n\nsubstitute:\n\n(4d-6)+3d=8\n4d+3d-6=8\ \ \ \ /+6\n7d=14\ \ \ \ /:7\nd=2\n\nc=4\cdot2-6=8-6=2\n\n\left\{\begin{array}{ccc}c=2\nd=2\end{array}\right$

Which graph correctly solves the system of equations below?y = 2x2 − 3
y = −x2

one quadratic graph opening down and one quadratic graph opening up. They intersect at 1, negative 1 and negative 1, negative 1.

one quadratic graph opening up and one quadratic graph opening down. They intersect at 0, negative 3.

two quadratic graphs opening up. They intersect at 0, negative 3.

quadratic graph opening up and quadratic graph opening down. They intersect at 1, 2 and negative 1, 2

Answers

Answer:

one quadratic graph opening down and one quadratic graph opening up. They intersect at 1, negative 1 and negative 1, negative 1

i.e. they intersect at (1,-1) and (-1,-1)

Step-by-step explanation:

We are asked to find which graph correctly solves the system of quadratic equations:

$y=2x^2-3$

and $y=-x^2$

on solving the equation by the method of substitution i.e. on equating both the equations we get:

$2x^2-3=-x^2\n\n2x^2+x^2=3\n\n3x^2=3\n\nx^2=1\n\nx=+1,x=-1$

Now on putting the value of x in any of the equations we get the value of y as:

$y=-1$

Hence, the point of intersections of both the graph is:

(1,-1) and (-1,1).

Also the graph of the quadratic equation:

$y=2x^2-3$

opens upward.

and graph of the quadratic equation:

$y=-x^2$

opens downward.

Hello,

answer A is True, others are false

Pick a product that might be packaged in the shape of a rectangular prism.Surface Area: S.A.=2lw+2wh+2lh
Volume: V=lwh

Choose an appropriate length, width, and height for your package so that it can fit the product you are shipping. Using these dimensions, what is the ratio of surface area to volume?

Answers

Let us assume the following units of measure:
Length = 10 inches
Width = 5 inches
Height = 8 inches

Surface area = 2lw + 2wh + 2lh
S.A = 2(10in * 5in) + 2(5in * 8in) + 2(10in * 8in)
S.A = 2(50in²) + 2(40in² + 2(80in²)
S.A = 100in² + 80in² + 160in²
S.A = 340 in²

Volume = lwh
V = 10 in * 5 in * 8 in
V = 400 in³

ratio of the surface area to volume?
340 in² / 400 in³ = 34 / 40 in = 17/20 in

Answer:

Product: Iphone 6s plus box

W= 3in L= 6in H= 3in

And then use the surface area equation ( SA = 2lw + 2wh + 2lh)

To get your volume use the equation ( V = lwh)

And then divide those two SA / V and you get your ratio

Task 1 complete!!

Read more on Brainly.com - brainly.com/question/3948720#readmore

Step-by-step explanation:

The list price of a massaging chair is $450. The net price to the retailer is $391.50. What is the trade-discount rate? *

Answers

The list price of the massaging chair is 450 dollars. Now, the net price of the retailer is 391.50.
Let's find our the trade discount rate.
=> 391.50 dollars / 450 dollars = 0.87 * 100% = 87%
=> 100% - 87% = 13% is the trade discount of the retailer.

A cone has a volume of 6 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?

Answers

36 in. to the 3rd...........

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