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3 years ago

We have 3 broken glasses for every 500.Write this as a fraction and as a percent

Mathematics

1 answer:

Irina-Kira [14]3 years ago

6 0

Number of broken glasses / total glasses = 3/500 = 0.006 = 0.6%

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Why is the mechanical advantage of using a single pulley always 1? Assume there’s no friction. A. The input force is in a differ

Luba_88 [7]

Answer:

D. The input force is equal to the output force

Step-by-step explanation:

A pulley changes the direction of the applied force, but does not change its magnitude. The mechanical advantage is the ratio of output force to input force, so must be 1 when the force magnitude does not change.

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3 years ago

Write 26 3/4 as a decimal number

siniylev [52]

Answer:

26 3/4 as a decimal would be 26.75

3 0

3 years ago

Read 2 more answers

Evaluate ( c + d ) 3 C=3 d=4

Contact [7]

Answer:

The answer is 21

Step-by-step explanation: You substitue 3 for C and 4 for D and craete the equation $(3+4)3$ so you add 3+4=7 and you get $(7)3$ which is 7 times 3 =21

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4 years ago

Help me and you get 100 points and Brainliest

OlgaM077 [116]

hey someone else has already answered this!

a. To find the least squares regression equation for a group of (x,y) points:

Step 1: For each point(x,y), we need to calculate x² and xy first.

Step 2: Sum all x, y, x² and xy, which gives us Σx, Σy, Σx² and Σxy

Step 3: Calculate Slope m: m = (NΣxy − Σx Σy)/ N(Σx²) − (Σx)² , here N is the number of data.

Step 4: Calculate Intercept b: b = Σy − m(Σx)/ N

Step 5: Assemble the equation as y= mx+b

Here, we have ∑x = 120, ∑y= 1379, ∑x²= 919.5, ∑xy= 10466 and N= 16

So, m= (NΣxy − Σx Σy)/ N(Σx²) − (Σx)²

= 6.33

and b = Σy − m(Σx)/ N

= 38.71

So, the least squares regression equation is : y= mx+b ⇒ y= 6.33x +38.71

b. When x= 8, then y= (6.33×8)+38.71 = 50.64 + 38.71 =89.35

The approximate test score of a student who sleeps an average of 8 h a night is 89.35%

EVERYTHING IS FROM sicista on brainly!

8 0

3 years ago

Read 2 more answers

Graph y=x+1/x² and y=1/x for positive values of x.

AlekseyPX

Answer:

Graphic is showed in the figure below

Step-by-step explanation:

To graph the equations given, let's do a table for positive values of x, and, by replacing it in the equation, let's calculate the value of y. Knowing the coordinate points (x,y) we can build the graphic.

1 2 1

2 2.25 0.2

3 3.11 0.33

4 4.06 0.25

When x->0 both equations -> ∞, because lim(1/x) x->0 = ∞

The graphic is showed below. In red there is y = 1 + 1/x² and in blue y = 1/x

6 0

3 years ago