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3 years ago

A Community hall is in the shape of a cuboid. Work out the paint cost, tiles cost and total cost.

Mathematics

1 answer:

Lesechka [4]3 years ago

3 0

Answer:

2172 is the total cost

Cost for tiles: 1800

cost of paint: 372

Find the surface area of the wall without floor:(for cost of paint)

40 x 15 + 40x3x2 + 15x3x2 = 600 + 240 + 90 = 930

Cost: 930/25 x 10 = 372

Find area of floor:(to find cost of tiles)

40 x 15 = 600m^2

cost: 600 x 3 = 1800pounds

add them if needed

Hope this helps

Good Luck

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Anthony has to practice his guitar for 1.75 hours each morning and 2.5 hours each evening for the first 4 days this week. How ma

weqwewe [10]

Answer:

17 hours

Step-by-step explanation:

From the above question,

Anthony is practicing 4 days in a week

Hence

The number of hours he practices in the morning for 4 days =

1.75 hours × 4

= 7 hours

The number of hours he practices in the evening for 4 days =

2.5 hours × 4

= 10 hours

Therefore, the total number of hours he practices this week

= 7 hours + 10 hours

= 17 hours

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3 years ago

What’s the equation for g(x)

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Answer:

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Step-by-step explanation:

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On the first circle, what segment is a diameter? How long is it?

stiv31 [10]

Answer:

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Step-by-step explanation:

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3 years ago

Find the characteristic polynomial of A. Use x for the variable in your polynomial.You do not need to factor your polynomial. A

Vesna [10]

Answer: The required characteristic polynomial of the given matrix A is $x^3+6x+11x+6=0.$

Step-by-step explanation: We are given to find the characteristic polynomial of the following 3 × 3 matrix A with unknown variable x :

$A=\left[\begin{array}{ccc}0&0&1\\4&-3&4\\-2&0&-3\end{array}\right].$

We know that

for any square matrix M, the characteristic polynomial is given by

$|M-xI|=0,$ where I is an identity matrix of same order as M.

Therefore, the characteristic polynomial of matrix A is

$|A-xI|=0\\\\\\\Rightarrow \left|\left[\begin{array}{ccc}0&0&1\\4&-3&4\\-2&0&-3\end{array}\right]-x\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]\right|=0\\\\\\\Rightarrow \left|\left[\begin{array}{ccc}-x&0&1\\4&-3-x&4\\-2&0&-3-x\end{array}\right] \right|=0\\\\\\\Rightarrow -x(3+x)^2+1(0-6-2x)=0\\\\\Rightarrow (x+3)(-3x-x^2-2)=0\\\\\Rightarrow (x+3)(x^2+3x+2)=0\\\\\Rightarrow x^3+6x+11x+6=0.$

Thus, the required characteristic polynomial of the given matrix A is $x^3+6x+11x+6=0.$

6 0

3 years ago

Kyle has a loan of $32,890.

kow [346]

Answer:

A) 2631.20

Step-by-step explanation:

8% of 32,890 is 2631.2

6 0

3 years ago

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