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Lemur [1.5K]
4 years ago
9

Factor 4x2 + 21x + 5.

Mathematics
1 answer:
kirza4 [7]4 years ago
5 0

Hello there.


Factor the polynomial, 4x2 21x-18


84x ^3 - 18


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Al Dietrich is in training. He swims for 30 minutes, bicycles (10 mph) for 30 minutes, and runs (8 mph) for 30 minutes everyday.
allochka39001 [22]

Answer: 300 calories

Step-by-step explanation: let us assume that moving at any speed expends approximately 100 calories per mile. Moving a less-minute mile will burn a few more calories than moving a high-minute mile because of the added effort. Since the minutes for the 3 scenarios are the Same, then we can conclude that he is burning calorie at the same level in which the total equal to 300 calories

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3 years ago
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The radius of the base of a cylinder is increasing at a rate of 777 millimeters per hour. The height of the cylinder is fixed at
Tatiana [17]

Answer:

252<em>π</em>  or 791.7 mm³/h

Step-by-step explanation:

The volume of a cylinder is given by

V = \pi r^2h

We desire to find the volume rate, that is,\dfrac{dV}{dt}

\dfrac{dV}{dt} = \dfrac{dV}{dr}\cdot\dfrac{dr}{dt}

<em>dr/dt</em> is the rate of change of the radius which is 7 mm/h.

<em>dV/dr</em> is derived by differentiating the volume equation, yielding

\dfrac{dV}{dt} = 2\pi rh

At <em>r</em> = 12 mm and <em>h</em> = 1.5 mm,

\dfrac{dV}{dt} = 2\pi\times12\times1.5\times7 = 252\pi = 791.7

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3 years ago
How many oz are in 3/8 lb.
Kobotan [32]
There are sixteen ounces in a pound. 3/8 x 16/1= 48/8=6 oz
3 0
4 years ago
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How do I solve tan(62) = 12/x?
notsponge [240]

Answer:

x = 6/31 = 0.194

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    (62)-(12/x)=0

Step by step solution :

Step  1  :

           12

Simplify   ——

           x

Equation at the end of step  1  :

       12

 62 -  ——  = 0

       x

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  x  as the denominator :

          62     62 • x

    62 =  ——  =  ——————

          1        x  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

62 • x - (12)     62x - 12

—————————————  =  ————————

      x              x    

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  62x - 12  =   2 • (31x - 6)

Equation at the end of step  3  :

 2 • (31x - 6)

 —————————————  = 0

       x      

Step  4  :

When a fraction equals zero :

4.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 2•(31x-6)

 ————————— • x = 0 • x

     x    

Now, on the left hand side, the  x  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  2  •  (31x-6)  = 0

Equations which are never true :

4.2      Solve :    2   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

4.3      Solve  :    31x-6 = 0

Add  6  to both sides of the equation :

                     31x = 6

Divide both sides of the equation by 31:

                    x = 6/31 = 0.194

Answer :

                  x = 6/31 = 0.194

Rate?

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3 years ago
2x+4≥24 how do I solve this problem
Katen [24]
First subtract 4 then divide 2 so u can isolate x
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4 years ago
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