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3 years ago

Here are two steps from the derivation of the quadratic formula.

Mathematics

2 answers:

Lana71 [14]3 years ago

6 0

What took place between the first step and the second step? - A. Taking the square root of both sides.

As we can see from the first to second step, the left side of the equation goes from being squared to not being squared. While on the right side of the equation, the square root is now being taken.

Hope this helps!! :)

Assoli18 [71]3 years ago

5 0

The answer is A. Hope this helps.:)

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Solve the system of equations. 2x y = 7 5x y = 9

lana [24]

Are you missing something?
2xy=7
5xy=9
does not have a solution.
If you mean
2x+y=7
5x+y=9
please say so.

7 0

3 years ago

There were 10 students in a teacher's classroom. The next week, there were 19 students. What is the percent increase

mixas84 [53]

Answer:

Step-by-step explanation:

7 0

2 years ago

Answer all please, thank you :)

prisoha [69]

The angles in a triangle add up to 180 degrees. That's the same sum as a linear pair, which we get when two lines cross.

1. 180 - 65 - 45 = 70

Answer: 70°

2. 180 - 90 - 35 = 55

Answer: 55°

3. 180 - 120 = 180 - 50 - x

x = 70

Answer: 70°

6 0

2 years ago

Read 2 more answers

Joe owns a stock which has probability .5 of going up. This morning, he bought a ticket in a lottery game which gives him a prob

Anit [1.1K]

Answer:

The probability that Joe's stock will go up and he will win in the lottery is 0.00005.

Step-by-step explanation:

Let the events be denoted as:

X = the stock goes up

Y = Joe wins the lottery

Given:

P (X) = 0.50

P (Y) = 0.0001

The events of the stock going up is not dependent on the the event of Joe winning the lottery.

So the events X and Y are independent of each other.

Independent events are those events that can occur together at the same time.

The joint probability of two independent events A and B is,

$P(A\cap B)=P(A)\times P(B)$

Compute the value of P (X ∩ Y) as follows:

$P(X\cap Y)=P(X)\times P(Y)=0.50\times 0.0001=0.00005$

Thus, the probability that Joe's stock will go up and he will win in the lottery is 0.00005.

3 0

2 years ago

Read 2 more answers

What is the perimeter of a triangle with side lengths of 9, 12, and 4x?

ludmilkaskok [199]

The answer is 21 + 4x.

You find this answer by adding up all the sides.
9+12+4x= 21+4x ... you don't add 4x because it has a variable that we do not know of the value.

3 0

3 years ago