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dedylja [7]
3 years ago
7

Bobby thinks 5^2=10 what is wrong with this answer

Mathematics
2 answers:
Eddi Din [679]3 years ago
6 0

Answer:

5^2=5*5

25

Bobby thought 5^2 meant 5*2.

5^2 is 25, while 5*2 is 10.

nignag [31]3 years ago
5 0

Answer:

5^2 means 5*5 not 5*2

Step-by-step explanation:

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QUESTION 1
Kitty [74]

It's difficult to make out what the force and displacement vectors are supposed to be, so I'll generalize.

Let <em>θ</em> be the angle between the force vector <em>F</em> and the displacement vector <em>r</em>. The work <em>W</em> done by <em>F</em> in the direction of <em>r</em> is

<em>W</em> = <em>F</em> • <em>r</em> cos(<em>θ</em>)

The cosine of the angle between the vectors can be obtained from the dot product identity,

<em>a</em> • <em>b</em> = ||<em>a</em>|| ||<em>b</em>|| cos(<em>θ</em>)   ==>   cos(<em>θ</em>) = (<em>a</em> • <em>b</em>) / (||<em>a</em>|| ||<em>b</em>||)

so that

<em>W</em> = (<em>F</em> • <em>r</em>)² / (||<em>F</em>|| ||<em>r</em>||)

For instance, if <em>F</em> = 3<em>i</em> + <em>j</em> + <em>k</em> and <em>r</em> = 7<em>i</em> - 7<em>j</em> - <em>k</em> (which is my closest guess to the given vectors' components), then the work done by <em>F</em> along <em>r</em> is

<em>W</em> = ((3<em>i</em> + <em>j</em> + <em>k</em>) • (7<em>i</em> - 7<em>j</em> - <em>k</em>))² / (√(3² + 1² + 1²) √(7² + (-7)² + (-1)²))

==>   <em>W</em> ≈ 5.12 J

(assuming <em>F</em> and <em>r</em> are measured in Newtons (N) and meters (m), respectively).

3 0
3 years ago
The function f(x)= --x is shown on the graph.
sertanlavr [38]

Answer:

Option (3).

Step-by-step explanation:

Attached figure is the graph of a function,

f(x) = -\sqrt{-x}

Since domain of any function is the set of all possible input values of the function,

Therefore, Domain of the function is,

Domain : x ≤ 0 Or (-∞, 0]

And range of the function is the set of all possible output values (y-values) of the function.

Therefore, Range of the function will be,

Range : y ≤ 0 Or (-∞, 0]

Therefore, Domain and range of this function is same.

Option (3) will be the answer.

7 0
3 years ago
14. Product A is an 8 oz. bottle of cough medication that sells for $1.36. Product B is a 16 oz. bottle of cough medication that
oksano4ka [1.4K]
Product A is the lower unit price
3 0
3 years ago
Read 2 more answers
BRAINLEST FOR RIGHT ANSWER<br><br><br><br> 6. Which rule matches the function shown in the graph?
svetlana [45]

For this case we have a function of the form:

y = mx + b

Where,

m: slope of the line

b: cutting point with the y axis.

The line cuts to the y-axis at the point:

(x, y) = (0, 0)

Therefore, the value of b is given by:

b = 0

We now look for the slope of the line.

For this, we use the following equation:

m=\frac{y2-y1}{x2-x1}

Substituting values we have:

m=\frac{1-0}{3-0}

Rewriting:

m=\frac{1}{3}

Then, the equation of the line is:

y=\frac{1}{3}x

Answer:

the rule that matches the function shown in the graph is:

y=\frac{1}{3}x

7 0
3 years ago
Find the distance between the pair of points: (-6, 4) and (6,4)
blsea [12.9K]

Answer:

12.

Explanation:

Use the distance formula to determine the distance between two points.

4 0
3 years ago
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