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4 years ago

What's the quadratic equation?

2 answers:

6 0

The standard form of the quadratic equation is ax^2 + bx + c. In vertex form, it's y = a(x – h)2 + k.
The graph of a quadratic equation is a parabola, which looks like a u. If <em>a</em> is negative then it's an upside down u.

o-na [289]4 years ago

4 0

in 8th grade my algebra teacher made us memorize the quadratic equation song (to the rhythm of pop goes the weasel):

x equals negative b plus or minus the square root of b squared minus 4ac all over 2a

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How many of the 1000 smallest positive integers are congruent to 1 modulo 9?

Serjik [45]

1 modulo 9 is the set of numbers as follows:

(0(9) + 1), (1(9) + 1, ....)
which is:
1, 10, 19

All we have to do is divide 1000 by 9, and round down.

1000/9 = 111.111......
There are 111 numbers.
Now let us check our work.

the set is as follows:

(1,10,19, ....... (111)9 +1)
(1, 10, 19 ........ 1000)
We are within 1000.
Therefore, 111 of the 1000 smallest positive integers are congruent to 1 modulo 9.

5 0

4 years ago

There are 45 questions on your math exam. You answered 8/10 of them correctly. How many questions did you answer correctly?

liraira [26]

Answer:

36 questions were correct.

Step-by-step explanation:

In order to find how many questions correct, you have to multiply it :

$\frac{8}{10} \times 45 = 36$

4 0

3 years ago

Read 2 more answers

Solve: e^2x + 5 = 4<br> help pls

kaheart [24]

Answer:

The solution of the equation is $x=\frac{(ln4)-5}{2}$ ⇒ 3rd answer

Step-by-step explanation:

* Lets explain how to solve this problem

- The function f(x) = e^x is called the (natural) exponential function

- The natural logarithm (㏑), or logarithm to base e, is the inverse

function to the natural exponential function

∵ $e^{2x+5}=4$ is an exponential function

∴ We can solve it by using the inverse of e (㏑)

- Remember:

# $ln(e)=1$

# $ln(e^{m})=m(ln(e))=m$

- Insert ln in both sides

∴ $ln(e^{2x+5})=ln(4)$

∵ $ln(e^{2x+5})=(2x+5)ln(e)=2x+5$

∴ 2x + 5 = ㏑(4)

- Subtract 5 from both sides

∴ 2x = ㏑(4) - 5

- Divide both sides by 2 to find x

∴ $x=\frac{ln(4)-5}{2}$

* The solution of the equation is $x=\frac{(ln4)-5}{2}$

4 0

4 years ago

Read 2 more answers

The table shows the number of cups of water required when cooking different amounts of rice

Ad libitum [116K]

Please explain more your question

3 0

3 years ago

A bakery uses 8 tablespoons of honey for every 10 cups of flour to make bread dough. Some days they bake bigger batches and some

Tamiku [17]

Your answer: A bakery uses 8 tablespoons of honey for every 10 cups of flour to make bread dough. Some days they bake bigger batches ... brainly.com/question/18026512

7 0

2 years ago