3 years ago

What is the product? (9r-4)(-9r-4)

1 answer:

6 0

Product = sum of multiplication
If you expand the polynomial using the FOIL method you get the answer of:
-81r^2 + 16

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7. A coin is tossed and a day of the week is selected. What is the probability that you get tails and a day that begins with "S"

Mrrafil [7]

Answer:

1/7

Step-by-step explanation:

Lets start with the probability of flipping tails, 1/2.

Then the probability of the day starting with the letter s, 2/7.

Calculate the final probability by multiplying the two together.

$\frac{1}{2}*\frac{2}{7}=\frac{2}{14}$

You can simplify 2/14 down to 1/7

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1 year ago

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Simple, 4*pi*r^2

Step-by-step explanation:

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nikitadnepr [17]

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Step-by-step explanation:

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2 years ago

There are 6 cans in the box . there are 4 boxes how many cans in total

Paha777 [63]

24 cans in total is your answer

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2 years ago

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In the diagram mz3= x+ 30 and mz4 =2x-80. What is the measure of angle 3?

Andreas93 [3]

Given:

Consider the below figure attached with this question.

$m\angle 3=(x+30)^\circ$ and $m\angle 4=(2x-80)^\circ$ .

To find:

The measure of angle 3.

Solution:

From the below figure it is clear that, angle 3 and angle 4 are vertically opposite angles.

We know that, vertically opposite angles are always equal. So,

$m\angle 3=m\angle 4$

$(x+30)^\circ=(2x-80)^\circ$

$x+30=2x-80$

$x-2x=-30-80$

$-x=-110$

$x=110$

Now,

$m\angle 3=(110+30)^\circ$

$m\angle 3=140^\circ$

Therefore, the measure of angle 3 is 140 degrees.

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2 years ago