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maria [59]
3 years ago
15

How many real solutions does the equation: x2-7x+10=0 have?

Mathematics
1 answer:
DerKrebs [107]3 years ago
3 0
The discriminant is 9 and since the discriminant is a positive number, there are two real solutions to the equation. 
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The 2th term of The A.P is 7 and 9th term is 28, Find The comon difference and The first term.
Radda [10]

Answer:

difference = 3, first term = 4

Step-by-step explanation:

given, a2 = 7

a9 = 28

wkt, a2 = a + d = 7

<u>a9 = a + 8d</u><u> </u><u>=</u><u> </u><u>28</u>

- 7d = - 21

therefore d = 3

and wkt, d = a2 - a

a = 7 - 3 = 4

HOPE THIS HELPS

8 0
3 years ago
Write the given second order equation as its equivalent system of first order equations
Lilit [14]

The second-order equation as its equivalent system of first-order equations is

\left[\begin{array}{ccc}u(1)\\\\v(1)\end{array}\right] = \left[\begin{array}{ccc}7.5\\\\9\end{array}\right]

An equivalent system that has the identical answer is known as an equivalent structure. Given a gadget of two equations, we can produce an equal system by way of replacing one equation by means of the sum of the 2 equations, or by way of changing an equation by means of a couple of of itself.

Systems of linear equations are equivalent if and handiest in the event that they have an equal set of solutions. In other phrases, two systems are equal if and only if each answer of one in all of them is likewise a solution of the opposite.

In the structures sciences, a machine equivalent system is the conduct of a parameter or thing of a machine in a way just like a parameter or component of a distinctive system. Similarity means that mathematically the parameters and additives will be indistinguishable from each different.

Taking v = u, we have:

u" + 4u' + 6u = 4sin(3t)

--> v' + 4v + 6u = 4sin(3t)

So the system of equations is:

u' = 0u + 1v

v' = -6u - 4v + 4sin(3t)

So we can write it as:

u(1) = 7.5

v(1) = u'(1) = 9

So the initial condition matrix is:

\left[\begin{array}{ccc}u(1)\\\\v(1)\end{array}\right] = \left[\begin{array}{ccc}7.5\\\\9\end{array}\right]

Learn  more about the equivalent system here brainly.com/question/14878855

#SPJ4

3 0
2 years ago
A number from 13 to 21 is drawn at random.<br> P( a prime number)
Stolb23 [73]

Answer:

Probability[Prime number] = 1/3

Step-by-step explanation:

Given:

Total number between 13 to 21;

13, 14, 15, 16, 17, 18, 19, 20, 21

Find:

Probability[Prime number]

Computation;

Total number between 13 to 21 = 9

Total number of prime number;

13, 17 ,19

Total number of prime number = 3

Probability pf event = Number of favorable output / Total output

Probability[Prime number] = Total number of prime number / Total number between 13 to 21

Probability[Prime number] = 3 / 9

Probability[Prime number] = 1/3

4 0
3 years ago
Tyrone bought 5 postcards at $0.55 each and a set of postcards for $1.20. Write an expression to find the total amount Tyrone sp
Anna007 [38]
5*price\ of\ postacrd+5*setting\ of\\\\5 *0,55+5*1,20=2,75+6=8,75\$\\\\&#10;Tyron\ spent\ 8,75\$\ on\ poscards.
5 0
3 years ago
Evaluate f(x)=x+6 when x=-2,0, and 5Evaluate f(x)=x+6 when x=-2,0, and 5.
Andru [333]

Answer:

f(x) = x + 6 \\ f( - 2) =  - 2 + 6 = 4 \\ f(0) = 0 + 6 = 6 \\ f(5) = 5 + 6 = 11

7 0
3 years ago
Read 2 more answers
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