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3 years ago

I need some help with solving inequalitys 9x-9 greater thab or equal to 2(8x-15)

Mathematics

1 answer:

leonid [27]3 years ago

7 0

Simplify 2(8x-15) first

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A TV production warehouse can assemble 120 TV’s in 4 hours. How long does it

nirvana33 [79]

$\huge\boxed{2\ \text{minutes}}$

First, convert the number of hours to minutes.

$4*60=240$

Now, divide by the number of TVs assembled in that time.

$240\div 120=\boxed{2}$

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3 years ago

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Find AB using the given matrices.

solniwko [45]

The entry in row 1, column 1 of $\mathbf{AB}$ is

$\begin{bmatrix}2&4\end{bmatrix}\begin{bmatrix}5\\6\end{bmatrix}=2\cdot5+4\cdot6=34$

(i.e. the dot product of row 1 of $\mathbf A$ and column 1 of $\mathbf B$ )

The entry in row 1, column 2 of $\mathbf{AB}$ is

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The second option is the correct answer.

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3 years ago

A 11-inch candle is lit and burns at a constant rate of 1.3 inches per hour. Let t represent the number of hours since the candl

dem82 [27]

Answer:

f(t)= 11 in - 1.3 in/h *t

Step-by-step explanation:

defining the length of the candle as L , then since the candle burns at a constant rate , then

-dL/dt = 1.3 in/h = a

therefore

-∫dL = a∫dt

-L(t)=a*t + C , C=constant

at t=0 , the length of the candle is L₀= 11 in ,thus

-L₀=a*0 + C → C= -L₀

replacing the value of C

-L(t)=a*t - L₀

L(t) = L₀ - a*t = 11 in - 1.3 in/h *t

then

f(t)= 11 in - 1.3 in/h *t

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3 years ago