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3 years ago

Identify at least one confounding variable that undermines the conclusion drawn in the following fictional study:

Mathematics

1 answer:

soldi70 [24.7K]3 years ago

5 0

Answer:

Identifying at least one confounding variable that undermines the conclusion drawn in the fictional study is:

All students took the same comprehensive test.

Step-by-step explanation:

In a study, an independent variable causes an effect on the dependent variable. But a confounding variable is the variable that influences the independent variable as well as the dependent variable. If this third variable is not controlled, it might lead the researcher to make a wrong estimate of the relationship that exists between the independent variable and the dependent variable.

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N-6 divided by 3 = -4 what is n

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-6 is the answer that you want

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What is the volume of this cone?

olchik [2.2K]

Answer:

The volume of the cone is approximately 453.0 cm³

Step-by-step explanation:

The volume of a cone is one third that of a cylinder with the same height and radius. That gives us 1/3 πr²h, where r is radius and h is height.

However, we are not given the height of the cone, but the side length. We can work out the height using the Pythagorean theorem, as we have a right triangle with the height, base radius, and length. You may recall that the Pythagorean theorem states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of it's other two sides:

$a^2 = b^2 + c^2$

So we can find the height of the cone with that:

$10.8^2 = 7.4^2 + h^2\\h^2 = 10.8^2 - 7.4^2\\h^2 = 116.64 - 54.76\\h^2 = 61.88\\h = \sqrt{61.88}\\h \approx 7.9$

Now that we have the cone's height, we can solve for its volume:

$v = \frac{1}{3} \pi r^2 h\\v = \frac{1}{3} \pi \times 7.4^2 \times 7.9\\v = \frac{1}{3} \pi \times 54.76 \times 7.9\\v = \frac{1}{3} \pi \times 432.6\\v = \pi \times 144.2\\v \approx 453.0 cm^3$

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3 years ago

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Solve the given one-step equations. Show your work.

laila [671]

Isolate for each variable.
1. z= 6 - 10
z= -4

2. y= 48/8
y=6

3. q= 1+12
q= 13
4. 18 x 2= a
36= a
5. r= 7 x 3
r= 21

I think you can try the rest :)

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2 years ago

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Jalil and Victoria are each asked to solve the equation ax – c = bx + d for x. Jalil says it is not possible to isolate x becaus

Iteru [2.4K]

<span>solve the equation ax – c = bx + d for x:

1) Group the x terms together on the left: ax - bx - c = d

2) Group the constant terms together: ax - bx = c + d

3) factor out x: x(a - b) = c + d

4) Divide both sides of the equation by (a - b) to obtain a formula for x:
c+d
</span> x(a - b) = c + d => x = ---------
a-b

This shows that the given equation CAN be solved for x, but there is a restriction: a must NOT equal b, because if a-b = 0, we'd have division by zero (which is not defined).

Where is Victoria's solution? Please share it if you want to discuss this problem further. Thank you.

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3 years ago

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