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3 years ago

Use the cubic model y = 6x3 - 5x2 + 4x – 3 to estimate the value of y when x = 2.

Mathematics

2 answers:

jeka943 years ago

5 0

Answer:

The answer is B.

Step-by-step explanation:

You have to substitute x = 2, into the equation of y :

$y = 6 {x}^{3} - 5 {x}^{2} + 4x - 3$

$let \: x = 2$

$y = 6 {( 2)}^{3} - 5 {(2)}^{2} + 4(2) - 3$

$y = 48 - 20 + 8 - 3$

$y = 33$

Sidana [21]3 years ago

5 0

Yeah it 33 is correct

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3 years ago

A group of friends goes out to lunch and decides to split the bill. Their bill is $32.50, plus they want to leave a 20% tip. The

Ilya [14]

Answer:

9.75

Step-by-step explanation:

6.5= 20% of 32.50

32.50+6.5= 39

39/4 = 9.75

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3 years ago

Mr Binnix wife is older than her sister by 2 years if their ages add up to 52 how old is each sister? Let c represent Leigh Ann’

Mazyrski [523]

Answer:

the older sister is 27 and the younger is 25.

Step-by-step explanation:

C+2=Y

C+Y=52

2C+2=52

2C=50

C=25

25+2=Y

Y=27

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3 years ago

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3 0

2 years ago

Each 7th grader brings $5 for charity, while each 8th grader brings in $8. The total collected is $1380. There are 10 more 8th g

Scilla [17]

Answer:

7th graders- 100 students

8th graders- 110 students

Step-by-step explanation:

Let the number of 8th graders be represented by x and 7th graders be represented by y

Equation based on number

There difference between 8th and 7th graders is 10 hence equation becomes

x-y=10

Equation based on contribution

While x contribute each $8 and y contribute each $5, the total contribution is $1380 hence the equation becomes

8x+5y=1380

Combining equations

Having the two simultaneous equations which are

x-y=10

8x+5y=1380

Solving the equations.

5x-5y=50

8x+5y=1380

------------------

13x=1430

x=1430/13=110

Therefore, 8th graders are 110. Since the 8th graders were 10 more than 7th graders, the 7th graders will be 110-10=100 students

6 0

3 years ago