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3 years ago

I need help with this problem if you can help please tell me what you did so I can understand please :)

Mathematics

1 answer:

balu736 [363]3 years ago

6 0

The perimeter is 20 units

Step-by-step explanation:

The end-point of a side of square can be used to calculate length of a side. And the side will be used to calculate the perimeter.

Given

(3,-1) and (7,2)

Let

(3,-1) = (x1,y1)

(7,2) = (x2,y2)

We have to calculate the distance

The formula for distance is:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Let s be the side of a square

then,

$s=\sqrt{(7-3)^2+(2-(-1))^2}\\s=\sqrt{(4)^2+(2+1)^2}\\=\sqrt{16+(3)^2}\\=\sqrt{16+9}\\=\sqrt{25}\\=5\ units$

The side of square is 5 units. Then,

$Perimeter=P=4s\\=5*4\\=20\ units$

The perimeter is 20 units

Keywords: Perimeter, Square

Learn more about perimeter at:

#LearnwithBrainly

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Please help me ASAP!!!! :) I’d appreciate it

Amiraneli [1.4K]

Answer:

5×(-4) = -20

(-1) × 4 = -4

Step-by-step explanation:

Here it' sayin when a positive number ( it may be odd or even ) gets multiplied with an even number ( it may be positive or negative ) , the product will be positive number.

5×(-4) = -20 .Here 5 is a positive number & 4 is a negative even number but the product -20 is a negative number. So it contradicts the statement.

(-1) × 4 = -4 . Here -1 is a negative number & 4 is a positive even number but the product -4 is a negative number. So it contradicts the statement.

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3 years ago

What Is ''Seven times the sum of x and five is forty-nine'' written with no words?

WINSTONCH [101]

Answer:

7(x+5)=49

Step-by-step explanation:

7 times means multiplication, so 7 times the sum of x and five is 7(x+5). When they say is 49, that means 7(x+5)=49

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3 years ago

There are 30 chairs in the band room mr avery wants to have the same number of chairs in each row there must be more than 1 row

kari74 [83]

Answer:

(Rows, chairs)= (2,15), (3,10), (5,6)

Step-by-step explanation:

Given: There are 30 chairs in the band room.

Criteria: There has to be same number of chairs in each row. There must be more than one row and the number of chairs in each row must also be greater than the number of rows.

First finding the divisor of 30:

1,2,3,5,6,10,15,30

Now, we need to look into divisor which qualify the criteria in the multiple of rows and number of chairs.

∴ 30= $2\times 15$

30= $3\times 10$

30= $5\times 6$

∴ Mr Avery can use either of these option to arrange rows and chairs.

(Rows, chairs)= (2,15), (3,10), (5,6)

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3 years ago

Rewrite y=4-2x in slope-intercept form.

Sindrei [870]

This is already in slope intercept from. because the slope is -2 and the y intercept is 4. so if you put it in stander form you would get y=-2x+4

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3 years ago

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zepelin [54]

For a set to be a function, there can be no repeating x-values. Therefore, the answer is (-4,5), because the input value "-4" has two different output values.

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3 years ago

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