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3 years ago

What is a negative control.

Mathematics

1 answer:

OLga [1]3 years ago

7 0

Answer:

Negative controls are particular samples included in the experiment that are treated the same as all the other samples but are not expected to change due to any variable in the experiment.

Step-by-step explanation:

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Which equation represents the line that contains the point (-2, 9) and is perpendicular to the line y = 2x + 6?

olganol [36]

Y=-1/2x+8

perpendicular means slope is opposite reciprocal so it would be -1/2

y=-1/2x+b
Plug in points and solve for b
B=8

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a 76 inch pipe is cut into two pieces One piece is three times the length of the other find the lengh of the shorter piece?

SOVA2 [1]

Answer:

Step-by-step explanation:

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3 years ago

If the sales tax rate is 7.25% in California, then how much tax should a merchant charge in San Francisco for the sale of a $15

Semmy [17]

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3 years ago

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What are the coordinates of the imageof point A (2, -7) under the transalition (x,y) (x- 3, y 5)

jenyasd209 [6]

Answer:

The coordinates of the image of point A (2, -7) are A'(-1,-2).

Step-by-step explanation:

Note: The sign is missing between y and 5 in the rule of transitional.

Consider the rule of translation is

$(x,y)\Rightarrow (x-3,y+5)$

We need to find the image of point A (2, -7).

Substitute x=2 and y=-7 in the above rule.

$A(2,-7)\Rightarrow A'(2-3,-7+5)$

$A(2,-7)\Rightarrow A'(-1,-2)$

Therefore, the coordinates of the image of point A (2, -7) are A'(-1,-2).

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3 years ago

What is the volume of this rectangular prism 5/2 cm 4 cm 1/2

Naily [24]

Answer:

$5cm ^{3}$

Step-by-step explanation:

$v = whl \\ = \frac{5}{2} \times \frac{4}{1} \times \frac{1}{2} \\ = \frac{20}{4} \\ = 5 {cm}^{3}$

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3 years ago