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Vilka [71]
3 years ago
6

X^2+7x-11=0 using completing the square method

Mathematics
1 answer:
cricket20 [7]3 years ago
4 0

Answer:

it equals 69 because when. you add 21 you get 21 and then divide by 69 and then 21 then you get 69 hope this helps!

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Which system can be used to represent, x the number of tetra fish, and y, the number of goldfish, he purchased?
Fed [463]
The equation that would best describe the situation would be the first option. To solve this question, simply break down the question into sections and then use variables X and y to represent each of the things asked for in the problem. We know the following:

X = no of tetra fish
Y = no of goldfish
If there is twice as much goldfish than tetra fish, then it would be 2y.

X = 2Y.

Then knowing what X and y represent, find the equation that gives the total cost of fish he bought, knowing that 1.50 is for a goldfish and 2.00 is for a tetra fish.
7 0
3 years ago
How do you do PEMDAS
nexus9112 [7]
PEMDAS is the steps to do Order of operations...
P- parentheses
E- exponents
M- Multiplication
D-Division
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8 0
3 years ago
Read 2 more answers
Consider the following 8 numbers, where one labelled x
Fittoniya [83]

Answer:  70  and -16

==========================================================

Explanation:

For now, we'll assume x is the largest value (aka the max)

Let's sort the values from smallest to largest.

7, 20, 26, 27, 34, 41, 47, x

We see that 7 is the smallest item, so,

range = max - min = x - 7

Set this equal to 63 and solve for x

x-7 = 63

x = 63+7

x = 70

So x could be equal to 70.

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

Next, we'll assume that x is the smallest value

That means the min is x and 47 is now the max

max - min = range

47 - x = 63

-x = 63-47

-x = 16

x = -16

So if x is the smallest value, then it must be -16

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

Finally, we'll let x be somewhere between 7 and 47

Unfortunately, we can't pin down a specific value here since we could have lots of possible values. Three such examples are x = 8, x = 9, and x = 10. There are many others.

If your teacher is looking for 2 values only, then I would refer to the previous two sections and ignore this section entirely.

8 0
3 years ago
8.3 = -0.6 x + 11.3 what is x
finlep [7]

Answer:

x=5

:)

Step-by-step explanation:

5 0
3 years ago
What is the absolute value<br> 3|x+6|-7=20
zzz [600]
<h3>Answer:</h3>

\large\boxed{x=3\,\,\text{or}\,\,x=-15}

<h3>Step-by-step explanation:</h3>

In this question, we're solving the equation with the absolute value.

In this case, we would be solving for x.

The equation we are solving is:

3|x+6|-7=20

Lets solve:

3|x+6|-7=20\\\\\text{First, we add 7 to both sides}\\\\3|x+6|=27\\\\\text{We need to get the absolute value by itself, so}\\\text{we would divide both sides by 3}\\\\|x+6|=9\\\\\text{For absolute value, there could be two possiblities}\\\\x+6=9\,\,\text{or}\,\,x+6=-9\\\\\text{We would solve for both}\\\\x+6=9\\\\\text{Subtract 6 from both sides}\\\\x=3\\\\x+6=-9\\\\\text{Subtract both sides by 6}\\\\x=-15\\\\\boxed{x=3\,\,\text{or}\,\,x=-15}

Your answer would be x = 3 or x = -15

<h3>I hope this helped you out.</h3><h3>Good luck on your academics.</h3><h3>Have a fantastic day!</h3>
7 0
4 years ago
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