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OleMash [197]
3 years ago
12

Please help me...........................

Mathematics
1 answer:
malfutka [58]3 years ago
4 0

Answer:

B

Step-by-step explanation: because this negative

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Simplify this please
aliina [53]

Answer:

2a +5

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
a rectangular box with two sqaure opposite ends is to hold 8000 cubic inches. find the dimensions of the cheapest box if tge rec
AveGali [126]

Answer:

the dimensions of the box that minimizes the cost are 5 in x 40 in x 40 in

Step-by-step explanation:

since the box has a volume V

V= x*y*z = b=8000 in³

since y=z (square face)

V= x*y² = b=8000 in³

and the cost function is

cost = cost of the square faces *  area of square faces + cost of top and bottom * top and bottom areas + cost of the rectangular sides * area of the rectangular sides

C = a* 2*y² +  a* 2*x*y + 15*a* 2*x*y =  2*a* y² +  32*a*x*y

to find the optimum we can use Lagrange multipliers , then we have 3  simultaneous equations:

x*y*z = b

Cx - λ*Vx = 0 → 32*a*y -  λ*y² = 0 → y*( 32*a-λ*y) = 0 → y=32*a/λ

Cy - λ*Vy = 0  → (4*a*y + 32*a*x) - λ*2*x*y = 0

4*a*32/λ  + 32*a*x - λ*2*x*32*a/λ = 0

128*a² /λ +  32*a*x - 64*a*x = 0

32*a*x = 128*a² /λ

x  = 4*a/λ

x*y² = b

4*a/λ * (32*a/λ)² = b

(a/λ)³ *4096 =  8000 m³

(a/λ) = ∛ ( 8000 m³/4096 ) = 5/4 in

then

x  = 4*a/λ = 4*5/4 in = 5 in

y=32*a/λ = 32*5/4 in = 40 in

then the box has dimensions 5 in x 40 in x 40 in

3 0
3 years ago
Plz answer quickly and right T^T first one gets brainliest
netineya [11]

Answer:

the 2nd answer

Step-by-step explanation:

it makes sense

4 0
3 years ago
The measure of angle 2 is (3x+10) degrees and the measure of angle 4 is (4x-15) degrees.What is the measure of angle 7
laiz [17]

Answer:

7 is (5-20) degrees because if you see 2is (3* 10) or 4 is (4*- 15) you will get your Answer

6 0
3 years ago
0.2(6x+1)/3.6=0.5x/9
Zinaida [17]

0.2(6x+1)/3.6=0.5x/9

Solution

(1.2x + 0.2)/3.6 = 0.5x/9

Cross multiplying, we get

9(1.2x + 0.2) = 3.6 * 0.5x

10.8x + 1.8 = 1.8x

10.8x - 1,8x = -1.8

9x = -1.8

Dividing both sides by 9, we get

x = - 0.2

That's the answer.

Thank you.

5 0
3 years ago
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