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3 years ago

Mathematics, what's the answer?

Mathematics

1 answer:

sleet_krkn [62]3 years ago

5 0

Answer:

-5

Step-by-step explanation:

The answer is -5 because when you take 3+9 you get 12 and then it says divide that by 3 which then equals 4 then subtract it by 9 which gives you the answer -5.

Hope DaSS HulP,

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I know this isn't math but what would be the topic sentence? "First of all, being alive and healthy is key to a persons happines

garik1379 [7]

The first sentence starting with, "First of all..." is the topic sentence. The second is not because it is adding detail to the sentence given.

Hope this helps!

8 0

3 years ago

You have a hemisphere with a volume of 6. What is the surface area with a sphere with the same diameter. Round to the nearest th

Vikki [24]

Answer:

(the volume of the hemisphere has no units, so i will suppose that it is 6m^3)

For a sphere of radius R, the volume is:

V = (4/3)*pi*R^3

Where pi = 3.14

And a hemisphere is half of a sphere, then the volume of a hemisphere of radius R is:

V = (1/2)*(4/3)*pi*R^3

We know that the volume of the hemisphere is 6 m^3, then we have the equation:

6 m^3 = (1/2)*(4/3)*3.14*R^3

Now we can solve this for R.

6 m^3 = 2.1*R^3

∛(6 m^3/2.1) = R = 1.41 m

The radius of the hemisphere is 1.41m

Now we want to find the surface of a sphere with this radius (if the radius is the same, then the diameter is the same)

For a sphere of radius R, the surface is:

S = 4*pi*R^2

Then the surface of this sphere is:

S = 4*3.14*(1.41 m)^2 = 24.971 m^2

3 0

3 years ago

Last year Jo paid £245 for her car insurance. This year she has to pay £883 for her car insurance. Work out the percentage incre

S_A_V [24]

Answer:

260%

Step-by-step explanation:

To solve how much the percentage increase cost of Jo's car insurance is, we first need to list down our variables.

1st year = £245

2nd year = £883

First off, we need to find the difference of the two.

Increase = £883 - £245

Increase = £638

Now to find the percentage increase, we take our increase and divide it by our 1st year's payment and multiply it by 100.

Percentage increase = $\dfrac{638}{245}*100$

Percentage increase = $2.60*100$

Percentage increase = 260%

So the percentage increase of last years payment to this years payment is 260%.

8 0

4 years ago

Is 0.5 to 0.75 increase or decrease

Lostsunrise [7]

Answer:

increase

Step-by-step explanation:

if your number gets bigger it's increase

if it gets smaller it's decrease

6 0

3 years ago

Only number 10............

Roman55 [17]

Answer: F. The Theoretical Probability is Greater than the Experimental Probability.

Step-by-step explanation: Theoretical probability gives you the odds of every outcome. With flipping a coin, the outcome odds of tails would always be 1/2. Experimental probability is the actual outcome that results from trials. During trials, tails was flipped 8 times. We can simplify 8/20 flips to find that tails was flipped 2/5 flips. In decimal form, 1/2 simbolizes .5 or 50%. 2/5 simbolizes .4 or 40%. The theoretical probability is greater than the experimental probability.

3 0

3 years ago