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3 years ago

Pls help im stuck and i have so much pressure

Mathematics

1 answer:

kogti [31]3 years ago

7 0

Area of two triangles: (1/2 x 4 x 6) x 2 = 24

Area of two rectangles on the roof: (5 x 12) x 2 = 120

Surface area of the rectangular prism: (2 x 8 x 6) + (2 x 8 x 12) = 96 + 192 = 288

Total surface area (not including the bottom cuz that wouldn't be painted) = 24 + 120 + 288 = 432

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Can someone help ASAP!!

n200080 [17]

Domain: (-2, 2)

Range: (4, -∞)

4 0

3 years ago

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Please solve the problem

jek_recluse [69]

Treat the matrices on the right side of each equation like you would a constant.

Let 2X + Y = A and 3X - 4Y = B.

Then you can eliminate Y by taking the sum

4A + B = 4 (2X + Y) + (3X - 4Y) = 11X

==> X = (4A + B)/11

Similarly, you can eliminate X by using

-3A + 2B = -3 (2X + Y) + 2 (3X - 4Y) = -11Y

==> Y = (3A - 2B)/11

It follows that

$X=\dfrac4{11}\begin{bmatrix}12&-3\\10&22\end{bmatrix}+\dfrac1{11}\begin{bmatrix}7&-10\\-7&11\end{bmatrix} \\\\ X=\dfrac1{11}\left(4\begin{bmatrix}12&-3\\10&22\end{bmatrix}+\begin{bmatrix}7&-10\\-7&11\end{bmatrix}\right) \\\\ X=\dfrac1{11}\left(\begin{bmatrix}48&-12\\40&88\end{bmatrix}+\begin{bmatrix}7&-10\\-7&11\end{bmatrix}\right) \\\\ X=\dfrac1{11}\begin{bmatrix}55&-22\\33&99\end{bmatrix} \\\\ X=\begin{bmatrix}5&-2\\3&9\end{bmatrix}$

Similarly, you would find

$Y=\begin{bmatrix}2&1\\4&4\end{bmatrix}$

You can solve the second system in the same fashion. You would end up with

$P=\begin{bmatrix}2&-3\\0&1\end{bmatrix} \text{ and } Q=\begin{bmatrix}1&2\\3&-1\end{bmatrix}$

3 0

3 years ago

a gym has 275 members 40% are bronze members 28% are silver members the rest are good work out the gold members

statuscvo [17]

STEP 1:
Find % of gold members. Subtract the known % of bronze and silver members from 100%.

x= percent of gold members

x= 100% - (40% +28%)
x= 100% - 68%
x= 32% percent of gold members

STEP 2:
Find number of gold members. Multiply % of gold members by the total numbers of members (275).

x= # of gold members

x= 275 * 32%
x= 275 * 0.32
x= 88 gold members

Hope this helps! :)

6 0

4 years ago

X - 11 < 7 Please help✨✨

Ann [662]

x menos 11 menor que 7. .............................

7 0

3 years ago

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Assume that the amount of time that it takes an employee to service a car at an oil change facility follows the uniform probabil

Andru [333]

Answer:

Option A - 4.91

Step-by-step explanation:

The formula for theoretical standard deviation of uniform distribution is;

σ = √{(b-a)^2}/12

Now from the question, b = 38 minutes and a= 21 minutes

Therefore, σ = √{(38-21)^2}/12

= √{17^2}/12 = √289/12 = 4.907 which is approximately 4.91

8 0

3 years ago