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otez555 [7]
2 years ago
11

Please help me with this

Mathematics
2 answers:
Eva8 [605]2 years ago
6 0

Answer:

128

Step-by-step explanation:

they are parralel

Katen [24]2 years ago
3 0

Answer:

the answer is 128 they are parallel

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Is this true all rectangles are similar
satela [25.4K]

Answer:

No they are not; rectangles are only similar if there is a consistent ratio between all sides. An example of two rectangles that are similar would be a rectangle with dimensions of 2 x 7 and another one with dimensions of 4 x 14.

8 0
3 years ago
Read 2 more answers
Theater can seat 246 people. The number of rows is 6 less than the number of seats in each row. Bow many rows of seats are ther
Rus_ich [418]

Step-by-step explanation:

x = number of rows

y = number of seats per row

xy = 246

x = y - 6

we can use the identity of the serving equation in the first, and we get

(y - 6)y = 246

y² - 6y - 246 = 0

to solve such a quadratic equation the general formula is

y = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 1

b = -6

c = -246

y = (6 ± sqrt(36 - 4×1×-246))/2 = (6 ± sqrt(36 + 984))/2 =

= (6 ± sqrt(1020))/2

now, I see a problem for that particular scenario, because 1020 is not a square number, and we get solutions that are not whole numbers. and that does not make any sense here.

there should be whole number solution for the number of seats and rows.

I think therefore there is a mistake in the specified numbers.

if the theater would seat e.g. 247 people (instead of 246), then it would all work out perfectly.

therefore, I am changing the last solution approach accordingly :

in our case

a = 1

b = -6

c = -247

y = (6 ± sqrt(36 - 4×1×-247))/2 = (6 ± sqrt(36 + 988))/2 =

= (6 ± sqrt(1024))/2 = (6 ± 32)/2

y1 = (6 + 32)/2 = 38/2 = 19

y2 = (6 - 32)/2 = -26/2 = -13

a negative number for the number of seats did not make any sense, so,

y = 19 is the valid solution.

out of the first equation we get then

x × 19 = 247

x = 247/19 = 13

so, the theater has 13 rows (with 19 seats in each row).

6 0
2 years ago
The Vacaville tax assessor determined that the market value of the Perry’s house is $132,000. The rate of assessment in Vacavill
Oksanka [162]

Answer:

  $3217.50

Step-by-step explanation:

The tax is computed as ...

  ($132,000)(1/2)(48.75/1000) = 66·48.75 = 3217.50

The real estate tax on the Perry's house is $3217.50.

5 0
2 years ago
Simplify (15+6)^2-(8-5)^2
Art [367]
Use "PEMDAS" (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction) to know what to do first.

(15 + 6)^{2} - (8 - 5)^{2}   Solve the insides of the parentheses
21^{2} - 3^{2}                   Solve the exponents (21 x 21) and (3 x 3)
441 - 9                             Subtract
432

3 0
3 years ago
Jane drove 385 miles in 7 hours.<br> At the same rate, how many miles would she drive in 5 hours?
shutvik [7]

Answer:

275

Step-by-step explanation:

385 ÷ 7 = 55 (miles per hour)

55 × 5 = 275 (miles in 5 hours)

3 0
3 years ago
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