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Paladinen [302]
3 years ago
7

A student wrotw a variable expression n-5 for the word phrase n less than 5. explain the students error

Mathematics
1 answer:
zheka24 [161]3 years ago
3 0
Less than does mean minus, but when the question says less than some number, that number goes first. should have written 5-n
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What are the zeros of the function represented by the quadratic expression 2x^2-5x-3
emmasim [6.3K]
 2x2-5x-3=0 

Two solutions were found :

 x = -1/2 = -0.500

 x = 3

Step by step solution :

Step  1  :

Equation at the end of step  1  :

(2x2 - 5x) - 3 = 0

Step  2  :

Trying to factor by splitting the middle term

 2.1     Factoring  2x2-5x-3 

The first term is,  2x2  its coefficient is  2 .
The middle term is,  -5x  its coefficient is  -5 .
The last term, "the constant", is  -3 

Step-1 : Multiply the coefficient of the first term by the constant   2 • -3 = -6 

Step-2 : Find two factors of  -6  whose sum equals the coefficient of the middle term, which is   -5 .

3 0
3 years ago
Lee sells electronics. He earns a 5% commission on each sale he makes.
NISA [10]

Answer:

a) c = (5/100)*d

b) c = 0.05*d

c) The ratio between what Lee recieves and what he sold.

d) d = 2000

Step-by-step explanation:

Since Lee earns 5% in commission for each sale then:

a) c = (5/100)*d

b) c = 0.05*d

c) In this context the constant of proportionality means the ratio of the value Lee sold that he'll earn as a comission.

d) Since he wants to earn $100, then c = 100 and we solve for d

c = 0.05*d

100 = 0.05*d

0.05*d = 100

d = 100/0.05 = $2000

He needs to sell $2000.

3 0
3 years ago
You want to convert 50°F to degrees Celsius. Solve the formula for C, and then use it to convert the temperature. What is the co
Zepler [3.9K]

9514 1404 393

Answer:

  • C = (5/9)(F -32)
  • 50°F ⇒ 10°C

Step-by-step explanation:

Starting with the formula for degrees Fahrenheit, we can solve for degrees Celsius.

  F = 32 +9/5C

  F -32 = (9/5)C . . . . . subtract 32

  (5/9)(F -32) = C . . . . multiply by the inverse of the coefficient of C

The formula for Celsius temperature from Fahrenheit temperature is ...

  C = (5/9)(F -32)

__

For F = 50, the corresponding Celsius temperature is ...

  C = (5/9)(50 -32) = (5/9)(18) = 10 . . . degrees Celsius

5 0
2 years ago
If you can score 54 points in 6 minutes, how many points are you scoring in one minute? please help all my points.
Bess [88]

Answer:

Step-by-step explanation:

54 / 6= 9  

9 points per minute

8 0
2 years ago
Read 2 more answers
Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation h = -16t2 + 72t +
boyakko [2]

Answer:

  about 5.613 seconds

Step-by-step explanation:

Using the quadratic formula to find the value of t when h = 0, we have ...

  at² +bt +c = 0

  t = (-b±√(b²-4ac))/(2a)

  t = (-72±√(72² -4(-16)(100)))/(2(-16))

  t = (-72±√11584)/-32 = (9±√181)/4

Only the positive value of t is of interest.

  The coin will hit the stream after (9+√181)/4 seconds ≈ 5.613 seconds.

4 0
3 years ago
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