3 years ago

What is the value of x when 9x=45

Mathematics

2 answers:

Olegator [25]3 years ago

8 0

Answer: x=5

Explanation: 45/9 =5

kkurt [141]3 years ago

6 0

Answer:

Step-by-step explanation:

45 divided by 9= 5

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If 1900 square centimeters of material are available to make a box with a square base and an open top, find the largest possible

Evgen [1.6K]

Answer:

Volume = $7969$ cubic centimeter

Step-by-step explanation:

Let the length of each side of the base of the box be A and the height of the box be H.

Area of material required to make the box is equal to is $A^2 + 4*A*H.$

$A^2 + 4*A*H = 1900$

Rearranging the above equation, we get -

$`H = \frac{(1900 - A^2)}{(4*A)}$

Volume of box is equal to product of base area of box and the height of the box -

$V = A*A* H$

Substituting the given area we get -

$\frac{A^2*(1900 - A^2)}{4A} = \frac{(1900*A - A^3)}{4}$

For maximum volume

$\frac{dV}{dA} =0$

$\frac{ 1900}{4} - \frac{3*A^2}{4} = 0$

$A^2 = \frac{1900}{3}$

Volume of the box

= $\frac{\frac{1900}{3}*(1900 - \frac{1900}{3}) }{4 * \sqrt{\frac{1900}{3} } }$

= $7969$ cubic centimeter

3 0

3 years ago

A) 93<br>B) 85<br>C) 107<br>D) 79

Alex787 [66]

D is the answer i think it is at least

6 0

3 years ago

Schach [20]

Answer:

step 1:

2,-5

step 2:

7,1

step 3:

6/5

Step-by-step explanation:

5 0

3 years ago

How long should a person take to travel 2000m at an average speed of 5m/s

zimovet [89]

Answer:

400

Step-by-step explanation:

8 0

2 years ago

Help I don't understand this, Can someone explain this to me?

saul85 [17]

Answer:

The second answer is correct (5 x 1,000,000,000)

Step-by-step explanation:

Just count the number of zeros. Multiplying a number liket his by five doesn't change the number of zeros

7 0

2 years ago

Read 2 more answers