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3 years ago

Allen runs 8 in 3 hours at a steady pace. how long does it take him to run 3 miles?

Mathematics

1 answer:

Fed [463]3 years ago

5 0

8/3= 2.67 miles per hour
1.123 hrs, or around 1 hr and 6 min?

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During a cold winter, the temperature stayed below zero for 10 days (ranging from −20 to −5). The variance of the temperatures o

Serjik [45]

Answer:

The variance of the temperatures of the 10 day period must be at least zero.

Step-by-step explanation:

The variance is the expectation of the squared deviation of a random variable from its mean. It measures how far a set of numbers are spread out from their average value.

Its unit of measure corresponding to the square of the unit of measure of the variable. In this case, the variance of the temperatures is expressed in (°C)². The variance has a minimum value of 0.

Since the variance is squared, it will always have values greater than zero.

5 0

3 years ago

Which pair of equations represents two perpendicular lines? answers shown in picture.

kolezko [41]

Answer:

y =1/2x+6

y = -2x+2

Step-by-step explanation:

Perpendicular line have slopes that multiply to -1

The slopes are negative reciprocals

-4*4 = 16 not perpendicular

1/2 * -2 = -1 perpendicular

1/5 *5 = 1 not perpendicular

2/3 * 2/3 = 4/9 not perpendicular

3 0

4 years ago

If the perimeter is 102, how long is the longest side?

aalyn [17]

25.5
102/4=25.5

Not really sure though

8 0

3 years ago

For its 28th anniversary, an Uncles Game store is offering a 28% discount on all board games. What is the discounted cost of the

svetlana [45]

Answer: $23.40

Step-by-step explanation:

We will find what percent of the normal cost the items are currently.

100% - 28% = 72%

Now, we will find 72% of $32.50

72% -> 0.72

$32. 0 * 0.72 = $23.40

The discounted cost is $23.40.

5 0

2 years ago

Students in Miss Moseley's fourth grade class are learning multiplication, and they demonstrate mastery by passing assessments.

blagie [28]

Answer:
Each will have passed 17 tests and it will take 3 weeks.

Explanation: 
Let x be the number of weeks.
The number of tests Travis passes to begin with is 11.
We then add 2 tests per week, or 2x to that, giving us:
11+2x.

The number of tests Jenifer has passed to begin with is 2.
We then add 5 tests per week, or 5x to that, giving us:
2+5x.

Setting these equal, we have: 
11+2x=2+5x.

Subtract 2x from each side: 
11+2x-2x=2+5x-2x;
11=2+3x.

Subtract 2 from each side: 
11-2=2+3x-2;
9=3x.

Divide both sides by 3:
 $\frac{9}{3} = \frac{3x}{3}$ ;
3=x.

It will take 3 weeks.
In 3 weeks,
Travis will have passed:
11+2*3 = 11+6 = 17 tests.
Jenifer will have passed the same number, since she catches up with him at this point.

6 0

3 years ago

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