Simplify this expression
4x(7x^2)
A 11x^2
B. 28x^2
C. 11x^3
D. 28x^3

28 x^3

Step-by-step explanation:

4x(7x^2)

4 * x* 7* x*x

4*7   x*x*x

28 x^3

D. 28x^3

Step-by-step explanation:

4 x 7 (x * x^2)

Multiply x by x^2 by adding exponents.

4 x 7x^3

Multiply

4 x 7 = 28x^3

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fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4