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faust18 [17]
3 years ago
12

Which shows the correct substitution of the values a,b, and c from the equation 1=-2x+3x^2+1 into quadratic formula?

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
7 0

Answer:

a = 3

b = -2

c = 0

Step-by-step explanation:

The standard form of a quadratic eqaution is:

a.x² + b.x + c = 0

where a, b and c are real numbers

Let's consider the following equation.

1 = -2x + 3x² + 1

We can re-arrange the terms.

0 = -2x + 3x² + 1 - 1

3x² - 2x + 0 = 0

The coefficient a for the quadratic term is a = 3.

The coefficient b for the linear term is b = -2.

The coefficient c is 0.

goldfiish [28.3K]3 years ago
6 0
Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.
x=2/3, 0
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For questions #6-8, use this data set and show your work  5, 10, 12, 4, 6, 11, 13, 5
Pachacha [2.7K]
Mean (average) can be found by adding up all the numbers and then dividing that by how many numbers there are.
(5+10+12+4+6+11+13+5) / 8 = 66/8 = 8.25 <==

the mode (the number used most often) = 5....just so u know, there doesn't have to be a mode, and sometimes there is more then 1 mode. But for this one, the mode is 5. <==

median (the middle number)...for this, u put the numbers in order...
4,5,5,(6,10),11,12,13
now start moving from both ends going inward until u find the middle number...keep in mind, when u have an odd number of numbers, u will have 1 middle number.....but when there is an even number of numbers, like in this case, u will have 2 middle numbers...so u take ur 2 middle numbers, add them, then divide by 2 to get ur median.
median = (6 + 10) / 2 = 16/2 = 8 <==
8 0
3 years ago
a solar lease customer built up an excess of 6,500 kilowatts hour (kwh) during the summer using his solar panels. when he turned
Jlenok [28]

Question:

A solar lease customer built up an excess of 6,500 kilowatts hour (kwh) during the summer using his solar panels. when he turned his electric heat on, the excess be used up at 50 kilowatts hours per day .

(a) If E represents the excess left and d represent the number of days. Write an equation for E in terms of d

(b) How much of excess will be left after one month (1 month = 30 days)

Answer:

a. E = 6500 - 50d

b. E = 5000

Step-by-step explanation:

Given

Excess = 6500kwh

Rate = 50kwh/day

Solving (a): E in terms of d

The Excess left (E) in d days is calculated using:

E = Excess - Rate * days

The expression uses minus because there's a reduction in the excess kwh on a daily basis.

Substitute values for Excess, Rate and days

E = 6500 - 50 * d

E = 6500 - 50d

Solving (b); The value of E when d = 30.

Substitute 30 for d in E = 6500 - 50d

E = 6500 - 50 * 30

E = 6500 - 1500

E = 5000

<em>Hence, there are 5000kwh left after 30 days</em>

4 0
3 years ago
Please help !! <br> basic triangle proofs
jeka57 [31]

Answer:

AD=AC (as D is midpoint to from line AC the line AD=AC

Step-by-step explanation:

HENCE PROVED

8 0
2 years ago
Divide using long division.<br> (2x2 + 7x + 6) : (x + 2)
Usimov [2.4K]

Answer:

2x+3

Step-by-step explanation:

-2x2 - 7x - 6

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

-x-2

-2x2 - 7x - 6  =   -1 • (2x2 + 7x + 6)

 -x - 2  =   -1 • (x + 2)

 2x2 + 7x + 6

x • (2x+3) and      (x+2)  •  (2x+3)

answer- 2x+3

4 0
3 years ago
Read 2 more answers
Please help me with the question below
nata0808 [166]

Answer:

4

Step-by-step explanation:

If Judge is x years old and Eden is 6 years older, then Eden is x + 6 years old.

The second part tells us that Eden will be twice as old as Judge in two years.

This means that in two years: (Eden's age) = 2 * (Judge's age).

Since we know that Eden's age can be represented as x + 6 and Judge's age can be represented as x, we can write this: x + 6 = 2 * x

Simplify the equation:

x + 6 = 2x

6 = x = Judge's age (in two years)

If Judge is 6 two years later, then he must be 4 now.

To check our work, we can just look at the problem. Judge is 4 years old and Eden is 6 years older than Judge (that means Eden is 10 right now). Two years later, Eden is 12 and Judge is 6, so Eden is twice as old as Judge. The answer is correct.

6 0
3 years ago
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