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klio [65]
3 years ago
14

miss Traynor class is taking a field trip to the zoo. the trip will cost $26 for each student. there 22 student in her class. ro

und each factor to estimate the total cost of the students field trip
Mathematics
2 answers:
slamgirl [31]3 years ago
6 0
$26 rounded to the nearest number is $30. $22 is rounded to the nearest number is $20.
$30 times $20= $60 in all
mestny [16]3 years ago
5 0
$60
.....................................................................................
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A walkway is being installed around a rectangular playground. The playground is 30 feet by 12 feet, and the total area of the pl
worty [1.4K]

Answer:

10.3

Step-by-step explanation:

From these question, we can illustrate the playground has a small rectangle with 30x12ft

the walkway is around it with an area of 1288ft²

the playground area = 30 x 12 = 360ft²

the length dimension of the walkway is 30+y+y( these is because the walkway is round the playground in two sides) = 30 +2y

the breadth dimension of the walkway is 12+y+y ( these is because the walkway is round the playground in two sides) = 12+2y

Area of walkway = (30+2y)(12+2y)= 30(12+2y)+2y(12+2y) = 360+60y+24y+4y²= 360+84y+4y²

The total area = 1288ft²

The total area = area of walkway - area of playground

1288ft² = 360+84y+4y² - 360

choose like terms

1288 = 360-360+84y+4y²

1288 = 84y+4y²

divide by 4

322= 21y+y²

y²+21y-322 =0

using quadratic formula

x= (-b±√b²-4ac)/2a = {-21±√21²-4(1)(-322)}/2x1 =  {-21±√441+1288}/2x1  = -21±√1729/2

-21+√1729/2   -21-√1729/2

√1729 = 41.5812457726

-21+√1729/2   -21-√1729/2

{-21+41.5812457726}/2   {-21-41.5812457726}/2

20.5812457726/2          -62.5812457726/2

10.2906228863              -31.2906228863

we disregard the negative sign

our width is 10.2906228863 ≅10.3

4 0
3 years ago
Read 2 more answers
Use the distance formula to find the length of the line with endpoints at (1,3) and (3,1)?
gulaghasi [49]
Let's plug the coordinate point values into the equation: 
\sqrt{(3-1)^{2} +(1-3)^{2} }
(1,3) is x₁ and (3,1) is x₂
Begin to simplify within the parenthesis: 
\sqrt{2^{2}+(-2)^{2}  }
Square the two numbers: 
\sqrt{4 + 4} 
Add the two to get: 
\sqrt{8} 
Since 8 is not a square number, this is as far as we can simplify this. Hope this helps!
8 0
3 years ago
S² = 3V / H
Ganezh [65]

The "opposite operation" of squaring is taking a square root.

The equation then gets translated S=\sqrt{3\frac{V}{H}}.

Hope this helps.

5 0
3 years ago
Read 2 more answers
Each square on Laura's chessboard is 13 square centimeters. A chessboard has 8 squares on each side. To the nearest hundredth, w
Marat540 [252]
If x is width of one square, then width of board is 8x.

Area of a square = x^2 = 13
x = \sqrt{13}

8x = 8\sqrt{13}

Answer:
8\sqrt{13} cm
7 0
3 years ago
Help help meeeeeee dont understAND
lesantik [10]

Answer:

2776 is the surface area.

Step-by-step explanation:

19 x 48 = 912 x 2 = 1824. 7 x 19 = 133 x 2 = 266. 49 x 7 = 343 x 2 = 686.

7 0
2 years ago
Read 2 more answers
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