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3 years ago

Please help! I really really need it.

Mathematics

1 answer:

Rainbow [258]3 years ago

4 0

The last one: -4(3n+5)

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How to find the solution for 3x-11=x+3 ?

Marina CMI [18]

Answer:

3 times ? - 11

? + 3

? = 7

Step-by-step explanation:

3 times 7 is 21 -11 is 10

7+3 is 10

Both equations has to make 10 so it is the answer of 7

Hope this helps :)

3 0

3 years ago

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Suppose you work for a sporting goods company, and you want to order shipping boxes for bike helmets. Each helmet is already pac

madreJ [45]

Answer: $n^2+6n-135=0$

Step-by-step explanation:

The length, width and height of the smaller box are n inches , n inches and 8 inches respectively,

And, According to the question,

The shipping boxes has 2 inches extra width than that of smaller box and 4 inches extra length than that of smaller box, Also, The height of the shipping box should be the same as the helmet box.

Thus, the Length of the shipping box = (n + 4) inches

Width = (n+2) inches and height = 8 inches

Thus, the volume of the shipping box,

$V = (n+4)\times (n+2)\times 8=(n^2+6n+8)8=8n^2+48n+64$

But, V = 1,144 cubic inches,

⇒ $8n^2+48n+64=1144$

⇒ $n^2+6n+8=143$

⇒ $n^2+6n-135=0$

Which is the required equation that models the volume of the shipping box.

8 0

3 years ago

The marked price of a mobile set is Rs 9,600 and 40% discount is allowed to make 20% profit. By what percent is the discount to

Tanya [424]

Answer:

Step-by-step explanation:

price after discount :

9 600 - 9 600×40%

= 5760

Original price (price without profit) :

let x be the original price of the device.

x + x × 20% = 5760

Then

x = (5 760×100)÷120

= 4 800

Original price increased by 30% :

4 800 + 4 800×30%

= 6 240

the discount needed to increase the profit by 10% :

[(9 600-6 240)÷9 600]×100

= 35%

Then

to increase the profit by 10% ,we have to reduce

the percent of discount to :

40% - 35%

= 5%

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2 years ago

Jet travelling at 500 km/h for 4 hours.

stellarik [79]

Answer: jet travels a total of 2000 km in total

Step-by-step explanation:

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3 years ago

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Can someone help me

My name is Ann [436]

Configure the euquations

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3 years ago