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STALIN [3.7K]
3 years ago
9

What is the value of m2-2mn+n2 for m=-2 and n=4

Mathematics
2 answers:
valkas [14]3 years ago
7 0
M2 -2mn + n2 = 4 - (-16) + 16 = 20 + 16 = 36 Have a nice days.......
MArishka [77]3 years ago
3 0

Answer:  The required value is 36.

Step-by-step explanation:  We are to find the value of the following expression for m = -2 and n = 4 :

m^2-2mn+n^2.

Substituting the values m = -2 and n = 4 in the given expression, we get

m^2-2mn+n^2\\\\=(-2)^2-2\times (-2)\times 4+4^2\\\\=4+16+16\\\\=36.

Thus, the required value is 36.

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Given the formula y = -1/2x - 4, what is the slope and y-intercept of the graph? PLEASE HELP!​
svet-max [94.6K]

Answer:

the slope is -1/2 and the y-intercept is -4

Step-by-step explanation:

The original formula is y=mx+b. m is the slope of the graph and b is the y-intercept. You just plug in the numbers to the original formula to get the formula for the graph. The slope is always the number that is right next to the x, or the number which is multiplied by the x. The y-intercept is always the number that is not by x.

8 0
3 years ago
A box is filled with 3 yellow cards, 2 blue cards, and 7 brown cards. A card is chosen at random from the box. What is the proba
Otrada [13]

We need to find the probability of the card chosen at random is yellow or brown.

So, since there are 3 yellow cards and 7 brown cards, the total numbers of cards that are yellow or brown is:

3+7=10

Now, the probability that the chosen card is yellow or brown can be found by dividing the above value by the total number of cards in the box.

The total number of cards in the box is:

3+7+2=12

Thus, that probability is given by:

\frac{10}{12}=\frac{10\div2}{12\div2}=\frac{5}{6}

Therefore, the answer is:

\frac{5}{6}

3 0
1 year ago
Help plz i need a anwser
Blababa [14]

Answer:

Your answer would be B: $25.20

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$24 + 1.2 is 25.2

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
If the regular selling price of a silk scarf is $49 and the markdown rate is 38%, what is its sale price?
Aleks04 [339]

Answer:

$30.38

Step-by-step explanation:

To find the sale price, find the percentage you pay after the discount. The discount is for 38%. So you pay 62%.

The selling price of the scarf will be 0.62(49) = 30.38

4 0
3 years ago
A rectangle has vertices at these coordinates. (5, −3), (5, −8),(8, −3) What are the coordinates of the fourth vertex of the rec
Katen [24]

Answer:

Coordinate of 4th vertex of the rectangle is ( 8 , -8 ).

Step-by-step explanation:

Given Vertices of Rectangle are ( 5 , -3 ) , ( 5 , -8 ) , ( 8 , -3 )

To find: Coordinate of Fourth Vertex of the rectangle.

First, Plot all given three points on the graph.

Graph is attached.

We know that Opposite sides of the rectangle are equal and parallel.

Also All angles of rectangles are right angle.

So to satisfy these properties of rectangle.

4th coordinate must be on line x = 8 and y = -8.

⇒ Fourth coordinate = ( 8 , -8 )

Therefore, Coordinate of 4th vertex of the rectangle is ( 8 , -8 ).

6 0
3 years ago
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