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Tems11 [23]
3 years ago
12

If using the method of completing the square to solve the quadratic equation x^2+15x+21=0, which number would have to be added t

o "complete the square"?
Mathematics
2 answers:
Anit [1.1K]3 years ago
8 0

Step-by-step explanation:

the answer is in the above image

Anna35 [415]3 years ago
3 0

Answer:

my answer is 225/5 sorry comments for wrong

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Which system of equation is represented​
olga nikolaevna [1]

Answer:

D

Step-by-step explanation:

First, let us figure out what is graphed and then manipulate each answer to try to match it.

The one with a positive slope is

y\leq x-2

The one with the negative slope is

y\geq 3-2x

Now that we have our graphed system of inequalities, we can try to match them to an answer.

A. while the x-2 is the same, the other does not have an x, so it cannot match.

B. The second inequality has the wrong sign, so it is impossible for this to be our answer.

C. When each of these are solved for y, you get y\leq 2x-3\\\\y\leq 2-x. Neither of these match so this cannot be correct.

D. When the first inequality is solved you get y\geq 3-2x

When the second inequality is solved you get y\leq x-2

As both of these answers match our graphed inequalities, D is the correct answer.

4 0
3 years ago
If I spin the spinner 200 times, how many times may I expect it to land on<br> blue?
vitfil [10]

Answer:

m

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Josiah invests $360 into an account that accrues 3% interest annually. Assuming no deposits or withdrawals are made, which equat
vlabodo [156]

Answer:

y = 360(1.03)x

Step-by-step explanation:

F = P x (1 + i)^n

F is the future worth, P is the present worth, I will be the interest rate, and n is the number of years. F = ($360)(1.03)^x

The principal amount of the money = $360

Annual rate of interest = 3%

Thus, the amount after x years which is increased by 3%.

Since, this amount represented by y,

The required equation that represents the amount of money in Josiah’s  account, y, after x years is, = 360(1+\frac{3}{100} )^x\\ = 360(1+0.03 )^x\\ = 360(1.03 )^x

This amount represented by y,

Therefore, the required equation that represents the amount of money in Josiah’s account, y, after x years is,

y = 360(1.03 )^x

Hope this helps you!

Have a nice evening! ;)

5 0
3 years ago
Read 2 more answers
Plssss helppp meeeee​
saw5 [17]

Answer:

the answer should be 152.6 ! just moving the decimal over to the left!!

8 0
2 years ago
HELPPP PLEASEEE ILL GIVE B IF CORRECT AND EXPLAIN
timurjin [86]
Answer: 60 degrees

Explanation: If all angles are same, each angle is 60 degrees and adds up to 180.
6 0
3 years ago
Read 2 more answers
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