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Gekata [30.6K]
3 years ago
14

4.) Which of the following represents a unit rate? (2 Points) A.) 300 miles in 5 hours B.) 120 miles in 2 hours C.) 50 miles in

1 hour D.) 500 miles in 3 hours
Mathematics
1 answer:
podryga [215]3 years ago
6 0
50 miles in 1 hr....thats ur unit rate
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At a local election there were two propositions on the ballot, R and S. Twice as many voters voted "yes" for R as for S. If the
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Answer:

c. 130

Step-by-step explanation:

Let call B the quantity of voters who voted yes for both propositions.

From the question we know that twice as many voters voted "yes" for R as for S, that can be written as the following equation:

R+B=2(S+B)

Where R is the number who voted "yes" for R but "no2 for S and S is the number who voted "yes" for S but "no" for R.

Replacing R by 750 and S by 310 and solving for B, we get:

750+B=2(310+B)

750+B=620+2B

2B-B=750-620

B=130

So, 130 voters voted yes for both propositions

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3 years ago
The radius of a cylinder is doubled and its height is halved. Find the ratios of their surface areas.
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Answer: 1:1

Step-by-step explanation:

Let r be the radius and h be the height of a cylinder.

Formula: Curved surface area of cylinder = 2\pi rh

Now, if  radius of a cylinder is doubled and its height is halved, then new radius will be R= 2r and new height  will be  H=\dfrac{1}{2}

Now, new surface area = 2\pi RH= 2\pi(2r)\dfrac{h}{2}= 2\pi rh

Ratio of curved surface areas : \dfrac{\text{Surface area}}{\text{New surface area}}=\dfrac{2\pi rh}{2\pi rh}=\dfrac{1}{1}

Hence, the ratios of their surface areas = 1:1 .

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Result when the number 90 is decreased by 7.1%? Round your answer to the nearest tenth.
melamori03 [73]

Answer:

83

Step-by-step explanation:

you need to think about the equation and think of the number closest to each number and decide which fits

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A

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A line of best fit is a line that gives an estimate of where the line would be, therefore it is close to most of the data points.

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