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3 years ago

Can someone help me with exercise 121?

Mathematics

1 answer:

yanalaym [24]3 years ago

8 0

It would be
(X^4+2X^2) -119(X^2-2X) then you would simplify
X^4+2X^2-119X^2-2X
So it would be
X^4+117X^2-2X=0
So basically X is undefined

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solve 49x + 9 = 49x + 83. write two equations in one variable that have the same number of solutions as this equation.

Sever21 [200]

Answer:

It has infinity solutions.

7 0

3 years ago

Suppose that the demand Q^Dand supply Q^Sfor maize meal in Kimberley is given by p=120-0.7Q^Dand p=3+0.2Q^S where the quantity i

bixtya [17]

Answer:

20 rands/kg

130,000 kg

Step-by-step explanation:

The equilibrium quantity and price are the solution to the system of equations ...

p = 120 -0.7q

p = 3 + 0.2q

Setting these equal, we get ...

0.2q +3 = p = -0.7q +120

0.9q = 117 . . . . . . . add 0.7q-3 to both sides

q = 117/0.9 = 130

p = 3 +0.2·130 = 29

The equilibrium price of maize meal is 29 rands per kg; the market equilibrium quantity is 130,000 kg.

8 0

3 years ago

In the Cash Now lottery game there are 8 finalists who submitted entry tickets on time. From these 8 tickets, three grand prize

alexgriva [62]

Answer:

The number of ways is $\left n} \atop {}} \right. P_r = 336$

Step-by-step explanation:

From the question we are told that

The number of tickets are $n = 8$

The number of finalist are $r =3$

Generally the number of way by which this winners can be drawn and arrange in the order of $1^{st} , \ 2nd , \ 3rd$ is mathematically represented as

$\left n} \atop {}} \right. P_r = \frac{n\ !}{(n-r) !}$

substituting values

$\left n} \atop {}} \right. P_r = \frac{ 8!}{(8-3) !}$

$\left n} \atop {}} \right. P_r = \frac{ 8* 7*6*5*4*3*2*1}{ 5*4*3*2*1}$

$\left n} \atop {}} \right. P_r = 336$

3 0

3 years ago

Laura collects nickels and dimes she has a total of 47 nickels and dimes she calculated the value of the coins and found out she

Gre4nikov [31]

Answer:

Number of dimes = 34

Number of nickels = 13

Step-by-step explanation:

Total number of coins = 47

Coins are in the form of nickels and dimes.

Value of a nickel = 5 cents

Value of a dime = 10 cents

Total value of coins = $4.05 or 405 cents

To find:

Number of nickels and dimes?

Solution:

Let number of nickels = $x$

Money value of nickels = 5 $x$

Let number of dimes = $y$

Money value of dimes = 10 $y$

Total value of coins = $5x+10y$

This value is given as equal as 405.

As per question statement, the equations can be written as:

$5x+10y = 405 ..... (1)\\x+ y = 47 ...... (2)$

Multiplying equation (2) with 5 and subtracting from equation (1):

$10y - 5y = 405 - 235 \\\Rightarrow 5y = 170\\\Rightarrow y = 34$

Number of dimes = 34

Number of nickels = 47 - 34 = 13

6 0

3 years ago

Graph the equation.<br><br> X squared plus y squared equals 9

BartSMP [9]

Answer:

Step-by-step explanation:

This graph is a circle. The general equation for a circle is x² + y² = r², where r is the radius. In this case, the radius is 3 because √9 = 3. Also, the center is (0,0) because the circle is not translated. Therefore, the graph is a circle with center (0,0) and radius 3. If you still need help, the y-intercepts are (0,±3) and the x-intercepts are (±3,0). Hope this makes sense!

7 0

3 years ago

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