3 years ago

Why is it important to have a control group in an experiment of investigation?

Mathematics

1 answer:

AnnZ [28]3 years ago

6 0

Answer:

I think its A

Step-by-step explanation:

Sorry if I'm wrong

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Formulate the quadratic function that contains the points (-1,4), (0,2) and (2,4).

larisa86 [58]

f(x) = x2 - x + 2

f(-1)=(-1)²-(-1)+2=4 contain the point (-1,4)

f(0) = 0²-0+2 = 2 contain the point (0,2)

f(2) = 2²-2+2 =4 contain the point (2,4)

4 0

2 years ago

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What is the solution to the equation -3d/a^2-2d-8 + 3/d-4 = -2/ d+2

Alex73 [517]

Answer:

d=1

Step-by-step explanation:

$\frac{-3d}{d^2-2d-8} +\frac{3}{d-4} =\frac{-2}{d+2}$

Lets factor the denominator d^2 -2d-8

d^2 - 2d - 8 = (d-4)(d+2)

$\frac{-3d}{(d-4)(d+2)} +\frac{3}{d-4} =\frac{-2}{d+2}$

Now make the denominators same

LCD: (d-4)(d+2)

$\frac{-3d}{(d-4)(d+2)} +\frac{3(d+2)}{(d-4)(d+2)} =\frac{-2(d-4)}{(d+2)(d-4)}$

Denominators are same on both sides

So equate the numerators

-3d +3(d+2) = -2(d-4)

-3d +3d +6 = -2d +8

6 = -2d + 8

subtract 8 on both sides

-2 = -2d

So d=1

3 0

2 years ago

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What is the volume, in cubic in, of a rectangular prism with a height of 8in, a width of 5in, and a length of 9in?

Maslowich

Answer:

360 in ^3

Step-by-step explanation:

The volume is given by

V = l*w*h

= 8 * 5 * 9

= 360 in ^3

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2 years ago

Please solve math problem for me... I will mark you brainliest

snow_lady [41]

Answer:

Angle 1 is 60°

Step-by-step explanation:

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3 years ago

It took 4 balloons to make the duck float. The duck

DaniilM [7]

Answer: 14 grams

Step-by-step explanation:

It took 4 balloons to make a duck that weighs 56 grams to float. With one balloon, the number of grams that will float will be 56 grams divided by 4. This will be:

= 56 grams ÷ 4

= 14 grams

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3 years ago