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stira [4]
3 years ago
6

What does y equal? ​

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
5 0

Answer:

y=-4x+17

Step-by-step explanation:

\begin{pmatrix}4&1\end{pmatrix}\quad \mathrm{and}\quad \begin{pmatrix}2&9\end{pmatrix}

\mathrm{Computing\:dot\:product\:of\:two\:vectors}:\quad \left(x_1,\:\:\ldots ,\:\:x_n\right)\cdot \left(y,\:\:\ldots ,\:\:y_n\right)=\sum _{i=1}^nx_iy_i

=4\cdot \:2+1\cdot \:9

=17

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Pachacha [2.7K]

Answer:

C

Step-by-step explanation:

Let's check the first condition [y=110, t=0] for all the choices and eliminate:

A)

y = 110e^{7t} - 80\\y = 110e^{0} - 80\\y=30

NO

B)

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C)

y = 30 + 80e^{-2t}\\y = 30 + 80e^{0}\\y=110

YES

D)

y = 110 - 80e^{2t}\\y = 110 - 80e^{0}\\y=30

NO

E)

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Note: e^0 = 1

Only C is satisfied. But let's make sure the 2nd condition applies as well.

y = 30 + 80e^{-2t}\\y = 30 + 80e^{-\infty}\\y=30+\frac{80}{e^{\infty}}\\y>>30

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Answer is C

4 0
4 years ago
The sides of a triangle have lengths of x, x + 5, and 25. If the longest side is 25, which of the following values of x would ma
Amiraneli [1.4K]
In a right angle, the sum of the squares of the two shorter sides is equal to the square of the longest side.
Here, the longest side is 25, the shorter sides are x and x+5.

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x^2+20x-15x-300=0 \\
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(x-15)(x+20)=0 \\
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6 0
4 years ago
WILL MARK BRAINLIEST AND 5 STARS ✨
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Answer:

11.25

Plan B as it is cheaper

Yes as in both equations the change in y repeats

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(E I dont know how to do)

Step-by-step explanation:

22.50 divided by the slope

0.1 < 0.5

They cross each other on the graph at 25 texts and 12.50 dollars

3 0
4 years ago
A 12-foot by 15-foot patio is increased by placing a stone border around the patio. The width of the border is the same all arou
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<span>That will get you to 378.</span>
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4 years ago
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