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2 years ago

Consider the equation:

Mathematics

1 answer:

Dmitrij [34]2 years ago

3 0

Answer:

Step-by-step explanation:

Question 1:

x² = -8x - 7

x² + 8x = -7

(x + 4)² = 9

So the answer is (x + 4)² = 9

Question 2:

(x + 4)² = 9

So x = -4 ± 3

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A sinusoidal source is usually described by the function cos(ωt+ϕ), where the units of the frequency ω are radians/second and th

xenn [34]

Answer:

49.999999999999974312306505198184 V

Step-by-step explanation:

Step 1: you see 45°, which gives you a easy conversion $\frac \pi 4$ ).

Now, $t = 392.7 \mu s = 392.7* 10^{-6} s$ , start replacing.

$V= 50 cos ( 2* 10^3 * 392.7 *10^{-6} -\frac \pi 4) = 50 cos (0.7854 - \frac \pi 4) =\\ 49.999999999999974312306505198184 V$

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4 years ago

Find each rate and unit rate.

Georgia [21]

Answer:

c is the answer

Step-by-step explanation:

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3 years ago

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Biologists use a formula to estimate the mass of a

balu736 [363]

Answer:

The approximate mass of the brain of a mouse is 2 grams

Step-by-step explanation:

The correct question in the attached figure

Let

B -----> the approximate mass B of the brain in grams

m ----> the mass of a mammal's brain in grams

we know that

$B=\frac{1}{8}m^{\frac{2}{3}}$ ----> given problem

we have

$m=64\ g$

substitute in the formula above

$B=\frac{1}{8}(64)^{\frac{2}{3}}$

Remember that

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3 years ago

61 1/20 as a decimal

OleMash [197]

Answer:

61.05

Step-by-step explanation:

1/20 = 5/100 = 0.05

61+0.05 = 61.05

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koban [17]

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