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QveST [7]
3 years ago
6

Question 4 of 13

Mathematics
2 answers:
Greeley [361]3 years ago
7 0

Answer:

b

Step-by-step explanation:

because if you divide 180 by 18, you get 10 which is most likely how much mabel is making hourly. then you multiply 10 times 30 hours and get 300

riadik2000 [5.3K]3 years ago
6 0

Answer:

B

Step-by-step explanation:

180 divided by 18 is 10

so multiply 30 by 10 and you get 300.

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Line segment XY has endpoints at (1, −3) and (5, −4). The segment reflects over the x-axis. Then, it undergoes a translation 3 u
morpeh [17]

Answer: The new endpoints are (4,3) and (8,4)

Step by step:

First, reflext around the x axis. This really means flipping the sign of the y coordinates:

(1,-3)\rightarrow(1,3)\\(5,-4)\rightarrow(5,4)\\

Then apply horizontal translation by +3 units. A horizontal translation means adding units to the x coordinates:

(1,3)\rightarrow(4,3)\\(5,4)\rightarrow(8,4)\\

3 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
The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almana
pochemuha
A. P(492 < x-bar < 512) 

<span>z = (492-502)/100/√90 </span>

<span>z = -0.95 is 0.1711 </span>

<span>z = (512-502)/100/√90 </span>

<span>z = 0.95 is 0.8289 </span>

<span>b. P(505 < x-bar < 525) </span>

<span>z = (505-515)/100/ √90 </span>

<span>z = -0.95 </span>

<span>z = (525-515)/100/ √90 </span>

<span>z = 0.95 </span>

<span>P(-0.95< z < 0.95) = 0.6578 </span>

<span>P(-0.95< z < 0.95) = 0.6578 </span>

<span>c. P(484 < x-bar < 504) </span>

<span>z = (484-494)/100/√100 </span>

<span>z = -1 is 0.1587 </span>

<span>z = (504-494)/100/√100 </span>

<span>z = 1 is 0.8413 </span>

<span>P(-1< z <1) = 0.6826</span>
6 0
3 years ago
Which are the roots of the equation 3m^2-5m+1=0
Svetradugi [14.3K]

Answer:

       -(-5) ± √13             5 ± √13

x = ----------------------- = ---------------

              2(3)                       6

Step-by-step explanation:

This is a quadratic equation, with coefficients 3, -5 and 1.

The discriminant, b² - 4ac, turns out to be (-5)² - 4(3)(1), or 25 - 12  =  13

Thus, the roots are:

       -(-5) ± √13             5 ± √13

x = ----------------------- = ---------------

              2(3)                       6

8 0
3 years ago
Find the value of the power.<br> 7-⁴<br>The value of the power is ( )​
Svetradugi [14.3K]

Answer:

  1/2401

Step-by-step explanation:

  7^{-4}=\dfrac{1}{7^4}=\boxed{\dfrac{1}{2401}}

8 0
3 years ago
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