3 years ago

I need help with this, due like right now!

Mathematics

1 answer:

adelina 88 [10]3 years ago

7 0

Answer:

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Step-by-step explanation:

nhgvf

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If 6 is added to twice a number and the sum is multiplied by 5 the result is the same as if the number is multiplied by -18 and

exis [7]

5(2x+6)=-18x+2
10x+36=-18x+2
28x=-34
x= $\frac{-34}{28}$
x= $\frac{-17}{14}$

6 0

4 years ago

Solve y+2x=5;x=-1,0,3

Anni [7]

If x=-1 => y-2=5=> y=7,x=-1
If x=0=> y+0=5=> y=5,x=0
If x=3=> y+6=5=> y=-1,x=3

8 0

4 years ago

Solve the equation in the interval 0 to 2pi.

galben [10]

Answer:

You don't need to single out $\cos \theta$ to solve this question.

To solve:

$\begin{aligned}3 \cos 4 \theta & = -2\\\\\cos 4 \theta & = -\dfrac{2}{3}\\\\4 \theta & = \cos^{-1}\left( -\dfrac{2}{3\right)}\\\\\implies 4 \theta & =2.30053... \pm 2 \pi n, -2.30053...\pm 2 \pi n\\\\\theta & =\dfrac{2.30053...}{4} \pm \dfrac{\pi n}{2}, -\dfrac{2.30053...}{4}\pm \dfrac{\pi n}{2}\end{aligned}$