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3 years ago

A cyclist travels 5 miles in 15 minutes. What is her average speed in mph?

Mathematics

1 answer:

Ber [7]3 years ago

6 0

S=d/t

15 minutes = 0.25 hour

S=5/0.25

S= 20 miles per hour

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Find (−3d2+10d−8)−(7d2−d−6). The difference is .

katovenus [111]

-10d^2 + 11d - 2

To find this, distribute the - to 7d^2 - d - 6.

This will give you a new equation of:

-3d^2 + 10d - 8 -7d^2 + d + 6

Combine like terms to get the answer above.

Hope this helps!

3 0

3 years ago

If the discriminant of a quadratic equation is 4 which statement describes the roots.

Alisiya [41]

Answer:

2 real roots

Step-by-step explanation:

If the discriminant is >0 then the equation has 2 real roots

If the discriminant is =0 then the equation has 1 real roots

If the discriminant is <0 then the equation has 2 complex roots

since the discriminant is 4, it has 2 real roots

6 0

3 years ago

jack has 6 pounds of candy, he plans on splitting it up equally with his 5 students how many pounds will each student get?

uysha [10]

The answer will be 1.2

3 0

3 years ago

Read 2 more answers

How much heavier is a quarter than a dime?<br> The quarter weighs: 5.67<br> The dime weighs: 2.268

Iteru [2.4K]

A dime weighs 2.268 grams, and a quarter weighs 5.670 grams.

3 0

3 years ago

Please help me compute standard deviation! Here is the problem, as written.

aleksandr82 [10.1K]

Answer:

The standard deviation for the income of super shoppers is 76.12.

Step-by-step explanation:

The formula to compute the standard deviation for the grouped data probability distribution is:

$\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}$

Here,

<em>x</em> = midpoints

$\mu=\sum x\cdot P(x)$

Consider the Excel table attached below.

The mean is:

$\mu=\sum x\cdot P(x)=32.3$

Compute the standard deviation as follows:

$\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}$

$=\sqrt{259.71}\\\\=76.1155204\\\\\approx 76.12$

Thus, the standard deviation for the income of super shoppers is 76.12.

3 0

3 years ago