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adell [148]
2 years ago
8

Which shows the equation below written in the form ax2 + bx + c = 0?

Mathematics
2 answers:
lisabon 2012 [21]2 years ago
4 0

{x}^{2}  + 7x + 9 = 3 \\  {x}^{2}  + 7x + 9 - 3 = 0 \\  {x }^{2}  + 7x + 6 = 0
The answer should be B
beks73 [17]2 years ago
4 0

Answer:

B

Step-by-step explanation:

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eight more than the product of four and a number is equivalent to seven less than the same number in equation form.
Georgia [21]
4n + 8 = n - 7
(In which 'n' represents the unknown number)

(4n + 8): "Eight more than the product of four and a number"

(= n - 7): "Is equivalent to seven less than the same number in equation form."

Subtract 8 from both sides:
4n = n - 15

Subtract n from both sides:
3n = -15

Divide both sides by 3:
n = -5
5 0
3 years ago
The human population of the earth can be modeled by p(T)=3.1(1.016)^t , where T represents the number of year since 1963 , and p
Mkey [24]

Answer:

  • See below

Step-by-step explanation:

<u>Given function:</u>

  • p(t)=3.1(1.016)^t

<u>The base of the growth rate is:</u>

  • 1.016 = 1 + 0.016

It represent a 1.6% of growth per year.

A.

  • Increasing

B.

<u>p(55) = 7.42 means:</u>

  • 55 years after 1963, in the year 2018, the population of Earth is 7.42 billions
7 0
2 years ago
The height of a right circular cylinder is 1.5 times the radius of the base. What is the ratio of the total surface area to the
Naily [24]

Let r represent the radius of cylinder.

We have been given that the height of a right circular cylinder is 1.5 times the radius of the base. So the height of the cylinder would be 1.5r.

We will use lateral surface area of pyramid to solve our given problem.

LSA=2\pi r h, where,

LSA = Lateral surface area of pyramid,

r = Radius,

h = height.

Upon substituting our given values in above formula, we will get:

LSA=2\pi r\cdot (1.5)r  

Now we will find the total surface area of cylinder.

TSA=2\pi r(r+h)

TSA=2\pi r(r+1.5r)

TSA=2\pi r(2.5r)

\frac{TSA}{LSA}=\frac{2\pi r(2.5r)}{2\pi r(1.5r)}

\frac{TSA}{LSA}=\frac{2.5r}{1.5r}

\frac{TSA}{LSA}=\frac{25}{15}

\frac{TSA}{LSA}=\frac{5}{3}

Therefore, the ratio of total surface area to lateral surface area is 5:3.

4 0
2 years ago
What is the answer of 6.39 ÷ 0.3
Ad libitum [116K]
You can use a calculator online you know? It is 21.3
4 0
3 years ago
Read 2 more answers
How much would you need to deposit in an account now in order to have $3000 in the account in 15 years? Assume the account earns
Rzqust [24]

Answer:

Principal = Total ÷ (1 + Rate)^years

That formula is found here: http://www.1728.org/compint2.htm

Principal = 3.000 / (1.03) ^ 15

Principal = 3.000 / 1.5579674166

Principal = $1,925.59

Step-by-step explanation:

7 0
2 years ago
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