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pentagon [3]
3 years ago
8

Value of 3x^2 +4y^2 if x=2, y=1, and z= -3

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0

3x^2+4y^2\\\\\text{Put the values of x=2, y=1 and z=-3 to the expression:}\\\\3(2^2)+4(1^2)=3(4)+4(1)=12+4=16

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Can I please have some help?
Dvinal [7]
Hey the answer is 4000 ft^3 , choice c
7 0
3 years ago
Lines s and L are perpendicular.If the slope of the line s is 5, what is the slope of the line f?
Ivanshal [37]

Answer:

A) -1/5

Step-by-step explanation:

Let slope of line s be m₁.

    m₁ = 5

Let the slope of L be m₂

As s and L are perpendicular,

      m₁ * m₂  = -1

       5 * m₂  = -1

             m₂ = -1 /5

4 0
4 years ago
A cone has a radius of 8 inches and a height of 12 inches.What is the exact volume of the cone?
Cerrena [4.2K]
The\ volume\ of\ the\ cone:V=\frac{1}{3}\pi r^2H\\\\where\\r-radius\\H-height\\----------------\\\\r=8\ in\ and\ H=12\ in\\\\therefore\\\\V=\frac{1}3{\pi\cdot8^2\cdot12=\frac{1}{\not3_1}\cdot\frac{\not12^4}{1}\cdot64\pi=4\cdot64\pi=\boxed{256\pi\ (in^3)}
8 0
3 years ago
Read 2 more answers
in his garden tim plants the seed 2 1/4 inches below the ground after one month the tomato plant has grown a total of 11 1/2 inc
anastassius [24]

Answer:

9 1/4

Step-by-step explanation:

1/2 = 2/4

11 1/2 = 11 2/4

11 2/4 - 2 1/4

11 - 2 = 9

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6 0
3 years ago
Your school wants to have 5 computers for every 12 students.There are now 125 computers and 924 students.How many more computers
Oksana_A [137]
First, determine the number of computers that are needed for 924 students.

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Since, there are only 125 computers, the difference can be calculated.
     
       d = 385 computers - 125 computers
   
                d = 260 computers

Hence, 260 more computers are still needed. 
3 0
3 years ago
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