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3 years ago

The perimeter of this rectangle is 80 centimeters. The rectangle is 25 centimeters long. What is the

Mathematics

1 answer:

ruslelena [56]3 years ago

7 0

Answer:

15 cm

Step-by-step explanation:

Perimeter is 2x+2y,

2x+2y=80

x+y=40

so since one side is 25 cm long

that means the other side is 40-25=15 cm

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Sara is a drummer in her school is marching band she wants to make a geometrically similar model of a snare drum for her stuffed

strojnjashka [21]

Answer:

Option B.

Step-by-step explanation:

Let the radius of the snare drum = r

and radius of the model = R

Ratio of the dimensions of the snare drum and the model = 1 : 4

So, $\frac{r}{R}=\frac{1}{4}$

Now as per question, dimensions of the snare drum is multiplied by a scale factor of $\frac{1}{2}$

Radius of the snare drum = $\frac{r}{2}$

Ratio of the radius of the snare drum and cylindrical model ,

$\frac{\frac{r}{2}}{R} =\frac{1}{4}$

$\frac{r}{2R}=\frac{1}{4}$

$\frac{r}{R}=\frac{1}{2}$

Therefore, the cylinder with Sara's dimensions will be geometrically similar but the scale factor will be 1 : 2

Option B is the answer.

6 0

3 years ago

What is the rational number equivalent to 3.24 repeating?

Lesechka [4]

3 24/99 is the mixed number
321/99 is the fraction

4 0

3 years ago

Read 2 more answers

What is thisssssssssssssss

disa [49]

Answer:

900 hundreds

Step-by-step explanation:

just take off all the numbers and add zeros

5 0

3 years ago

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Simplify the expression 6C2

iVinArrow [24]

Answer:

$^6C_2=15$

Step-by-step explanation:

Recall the formula:

$^nC_r=\frac{n!}{(n-r)!r!}$

We apply this formula to simplify $^6C_2$

This implies that:

$^6C_2=\frac{6!}{(6-2)!2!}$

$^6C_2=\frac{6!}{4!2!}$

$^6C_2=\frac{6\times5\times4!}{4!\times 2\times1}$

This simplifies to

$^6C_2=\frac{6\times5}{2\times1}$

$^6C_2=\frac{3\times5}{1\times1}=15$

8 0

3 years ago

Quall o numero de diagonais de um poligono com 15 lados

Romashka [77]

Answer:

90 diagonais.

Step-by-step explanation:

$n(n-3)/2=15(15-3)/2=15*6=90$

7 0

3 years ago