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JulsSmile [24]
3 years ago
9

Y squared + 5y - 84 equals what

Mathematics
1 answer:
iragen [17]3 years ago
7 0

The two possibilities for y are y = -12 and y = 7.

In order to solve this, we first just factor the equation. In order to factor a quadratic like this, we look for factors of the last number (-84) that add up to the middle number (5). In order to find that, we just need to list the factors.

1 * -84

-1 * 84

2 * -42

-2 * 42

3 * -28

-3 * 28

4 * -21

-4 * 21

7 * -12

- 7 * 12

This last factor is the one that adds to 5. Now we stick these two numbers along with y's into parenthesis.

(y - 7)(y + 12)

Now to solve, we can set each parenthesis equal to 0 to solve.

y - 7 = 0

y = 7

y + 12 = 0

y = -12

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stira [4]

All plots correctly show the range, 5–73.

The 1st, 2nd, and 4th choices correctly show the median, 54.

Of those, the 2nd and 4th choices correctly show the first quartile, 14.

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_____

There are an odd number of data points, so the middle one is the median. That value divides the remaining points in to two groups of 5. That number is also odd, so its median is the middle of that group. If we use x for the lower half and y for the upper half, you have

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5 0
3 years ago
You need to establish _____ for how to judge a concept.
makvit [3.9K]

Answer:

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Step-by-step explanation:

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3 years ago
What is the length of AB? A.2.59 B.9.66 C.10.35 D38.64
Jlenok [28]

Answer:

what

Step-by-step explanation:

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5 0
3 years ago
Consider the following sets of sample data: A: $29,400, $30,900, $21,000, $33,200, $21,300, $24,600, $29,500, $22,500, $35,200,
Lana71 [14]

Answer:

CV for A = 21.8%

CV for B = 15.5%

Step-by-step explanation:

The formula for coefficient of variation is:

CV = Standard Deviation / Mean

So,

For A:

Mean = Sum/No. of items

= 391300/14

=$27950

and

SD = $6085.31

CV for A = 6085.31/27950 * 100

=21.77%

Rounding off to one decimal

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= 43.58/11

=3.96

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What’s the Value of x?
denpristay [2]
X will be 8.49
the other side is 6 too
6 0
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