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nataly862011 [7]
3 years ago
13

a student is running 5-km race. He runs 1km every 3 min. Select the function that describes his distance from the finish line x

minutes.
Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
3 0
3x=time

x is the distance
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Express {x+1}{2x-3} as a trinomial.
Marizza181 [45]

Answer:

2x^2 + 5x + 3

Step-by-step explanation:

First, expand the original equation:

(x + 1)(2x + 3)

2x^2 + 3x + 2x + 3

Now simplify:

2x^2 + 5x + 3

And that's your answer!

6 0
3 years ago
Given that 1 x2 dx 0 = 1 3 , use this fact and the properties of integrals to evaluate 1 (4 − 6x2) dx. 0
Debora [2.8K]

So, the definite integral  \int\limits^1_0 {(4 - 6x^{2} )} \, dx= - 74

Given that

\int\limits^1_0 {x^{2} } \, dx = 13

We find

\int\limits^1_0 {(4 - 6x^{2} )} \, dx

<h3>Definite integrals </h3>

Definite integrals are integral values that are obtained by integrating a function between two values.

So, Integral \int\limits^1_0 {(4 - 6x^{2} )} \, dx

So, \int\limits^1_0 {(4 - 6x^{2} )} \, dx = \int\limits^1_0 {4} \, dx - \int\limits^1_0 {6x^{2} } \, dx \\=  4[x]^{1}_{0}    - \int\limits^1_0 {6x^{2} } \, dx \\=  4[x]^{1}_{0}    - 6\int\limits^1_0 {x^{2} } \, dx \\= 4[1 - 0]    - 6\int\limits^1_0 {x^{2} } \, dx\\= 4[1]    - 6\int\limits^1_0 {x^{2} } \, dx\\= 4    - 6\int\limits^1_0 {x^{2} } \, dx

Since

\int\limits^1_0 {x^{2} } \, dx = 13,

Substituting this into the equation the equation, we have

\int\limits^1_0 {(4 - 6x^{2} )} \, dx = 4 - 6\int\limits^1_0 {x^{2} } \, dx\\= 4 - 6 X 13 \\= 4 - 78\\= -74

So, \int\limits^1_0 {(4 - 6x^{2} )} \, dx= - 74

Learn more about definite integrals here:

brainly.com/question/17074932

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2 years ago
How do you do number 20?
LenKa [72]

The answer isnin the pictures

4 0
3 years ago
Find an angle between 0 and 2 that is coterminal with the given angle.
galben [10]

Answer:

40degres

Step-by-step explanation:

4 0
3 years ago
Find the area. Use 3.14 for the value of pi. Round your answer to the nearest tenth. diameter = 14 yd​
sergij07 [2.7K]
A=pi(radius)^2

Radius=Diameter/2

Radius= 14/2=7yds

A=3.14(7)^2

A=153.86yds
8 0
3 years ago
Read 2 more answers
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