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dsp73
3 years ago
6

Please help, thank you! I'll give brainliest to the correct answer with an explanation.

Mathematics
1 answer:
bagirrra123 [75]3 years ago
8 0

Answer:

119

Step-by-step explanation:

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The equation is 6a³+3b² when a=4 and b=1
IRISSAK [1]

Answer:

387

Step-by-step explanation:

6(4)³ + 3(1)²

6(64) + 3(1)

384 + 3

= 387

3 0
1 year ago
Read 2 more answers
Please solve this law of indices question
AnnyKZ [126]

Answer:

hope you understand .............

5 0
2 years ago
if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is .....a.2 b.-2 c 1/2 d.none ​
blsea [12.9K]

Answer:

k=2

Problem:

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..

Step-by-step explanation:

Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.

So we want the following:

[(k+2)/2]^2=2k

Apply the power on the left:

(k+2)^2/4=2k

Multiply both sides by 4:

(k+2)^2=8k

Expand left side:

k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2

Subtract 8k on both sides:

k^2-4k+4=0

Factor using the identity mentioned a couple lines above:

(k-2)^2=0

Since zero squared is zero, we want k-2=0.

Adding both sides by 2 gives k=2.

8 0
3 years ago
An electronic manufacturing company has determined that the monthly cost of producing x units of its newest stereo is C(x) = 250
SCORPION-xisa [38]

Answer: The monthly marginal profit when 8250 units are produced and sold is 2,427,125 dollars

Step-by-step explanation:

C(x) = 2500 + 10x

D(x) = 60000 - x/1500

Use the demand equation to find the monthly revenue equation.

R(x) = x.D(x) = x(60000 - x/1500) = 60000x - x²/1500

Find the monthly profit equation

P(x) = R(x) - C(x) = 60000x - x²/1500 - (2500 + 10x) =

60000x - x²/1500 - 2500 - 10x = 60000x - x² - 3750000 - 15000x/1500 =

45000x - x² - 3750000/1500

use it to compute the monthly marginal profit for a production level of 8250 units

P(8250) = 45000*8250 - 8250² - 3750000/1500 = 2,427,125

The monthly marginal profit when 8250 units are produced and sold is 2,427,125 dollars

3 0
2 years ago
Read 2 more answers
Question down below about linear equations and grapghing.
Alik [6]

The system of equations is -x + y = 4 and -2x + y = 0

<h3>How to create the system of linear equations?</h3>

To do this, we make use of the following ordered pairs

(4, 8)

The above point represents April 2008.

Let the system of equations be

mx + ny = 4

2mx + ny = 0

Substitute (4, 8) for x and y in the above equations.

4m + 8n = 4

8m + 8n = 0

Subtract both equations

4m - 8m = 4

This gives

-4m = 4

Divide by 4

m = -1

Substitute m = -1 in 8m + 8n = 0

-8 + 8n = 0

This gives

8n = 8

Divide by 8

n = 1

So, the system of equations is -x + y = 4 and -2x + y = 0

<h3>The graph of the system of equations</h3>

The system of equations is -x + y = 4 and -2x + y = 0

See attachment for the graph of the system of equation

<h3>Prove that the solution is (4, 8)</h3>

The above is represented in the (a) part of this solution

Verify that the solution is (4, 8)

We have:

-x + y = 4 and -2x + y = 0

Substitute (4, 8) for x and y in the above equations.

-4 + 8 = 4 --- true

-2*4 + 8 = 0 --- true

Both equations are true

Hence, the system of equations have been verified

Read more about system of equations at:

brainly.com/question/14323743

#SPJ1

6 0
1 year ago
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