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3 years ago

# 1) 22 students are __% of 55 * Show Work *

2 answers:

7 0

40% for number 1 So all you have to do is identify the parts of the equation. We don't know the percent, but we know everything else, so we can plug what we know into the equation

0.4

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X-y=9<br>2x+5y=4<br>solve by subsitution <br>show work

Alex73 [517]

The answers are..................... y= -2, and x= 7

4 0

3 years ago

One week a company filled 546 boxes with widgets each box held 38 widgets how many widgets did the company pack in boxes that we

Romashka [77]

Answer:

20748

Step-by-step explanation:

546 times 38

5 0

3 years ago

X^2-4x+6x-24 factored

Lynna [10]

Answer: (X+6)(x-4)

Step-by-step explanation:

x^2-4x+6x-24 ==> x^2+2x-24

*Find two numbers that multiplied gives you -24 and add up to 2*

(6)(-4)= -24 6-4=2

Final result= (x+6)(x-4)

3 0

2 years ago

What is the midpoint

mrs_skeptik [129]

Answer: (-1,-3

the formula for midpoint is

((x+x)/2 , (y+y)/2)

=(-3+1)/2 , (-1+-5)/2
=-2/2 , -6/2
=-1,-3

Or you could just look at the graph and see that -1,-3 is where the exact middle of the line is

6 0

2 years ago

How to solve this problem?

valentinak56 [21]

Very nice handwriting but the math and English are confusing.

Let's assume we're told

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2$

The subscript is important.

I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2 = \sum x_i^2 - 20 \sum x_i + 9(100)$

$\displaystyle \sum x_i^2= 20 \sum x_i - 900$

If 11 is the mean, the sum of the points is 9(11)=99.

$\displaystyle \sum x_i^2= 20 (99) - 900 = 1080$

Answer: 1080

6 0

3 years ago