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3 years ago

I really need help!!

Mathematics

2 answers:

Burka [1]3 years ago

6 0

Your answer would be 377.454

11111nata11111 [884]3 years ago

3 0

283.80x0.33% =93.654

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What are the zeros of the function f(x) = x2 + 8x + 4, expressed in simplest radical form? x = –4 ± 2StartRoot 3 EndRoot x = –4

SCORPION-xisa [38]

Answer:

Step-by-step explanation:

Discriminant Δ = √(8²-4×(1)×(4)) = √(48) = √(4×12) = √(4)×√(12) = 2√(12)

then x = (-8 ± 2√(12))÷2 = -4 ±√(12) = -4 ±√(3×4) = -4 ± 2√(3)

4 0

3 years ago

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Vector u has a magnitude of 5sq rt 3 feet and is directed due west. Vector v has a magnitude

Vikki [24]

The magnitude and the direction angle for the resultant vector are 10N and 120degrees respectively

The formula for calculating the resultant vector is expressed as:

$R^2 = u^2 + v^2\\R =\sqrt{u^2+v^2}$

Given the following distances:

u = -5√3 feet (west direction)

v = 5 feet

Substitute the given values into the formula above;

$R=\sqrt{(5\sqrt{3} )^2+5^2} \\R=\sqrt{(25 \times 3)+25}\\R=\sqrt{75 + 25}\\R=\sqrt{100}\\R = 10 feet$

The magnitude of the resultant vector is 10feet

Get the direction:

$\theta = tan^{-1}\frac{y}{x} \\\theta = tan^{-1}\frac{5}{-5\sqrt{3} }\\\theta =tan^{-1}\frac{-1}{\sqrt{3} }\\\theta = -60^0$

Since tan is negative in the second quadrant, hence;

$\theta = 180 - 60\\\theta = 120^0$

Hence the magnitude and the direction angle for the resultant vector are 10N and 120degrees respectively.

Learn more here: brainly.com/question/5177683

7 0

2 years ago

Solve by whatever method you would prefer. (Leave answers as improper fractions) 3x+2y=-10 2x-5y=3 (Show your work (Brainliest)

alexandr1967 [171]

Answer:

y = -29/19 and x = -44/19

Step-by-step explanation:

3x + 2y = -10 multiply by -2 ⇔ -6x - 4y = 20

2x - 5y = 3 multiply by 3 ⇔ <u> 6x - 15y = 9 </u>

Add the two equation -19y = 29

y = -29/19

Use equation one and solve for x

3x + 2(-29/19) = -10

3x - 58/19 = -10

3x = -10 + 58/19

3x = -190/19 + 58/19

3x = (-190 + 58)/19

3x = -132/19

x = - 132/ 19 ÷3 $\frac{-132}{19} (\frac{1}{3} ) = \frac{-44}{19}$

x = -44/19

5 0

2 years ago

Find the area of a circle with a radius of 21 inches.

Alex

Answer:

A≈1385.44in²

Step-by-step explanation:

A=πr2=π·212≈1385.44236in²

3 0

3 years ago

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jennifer is trying to save up for emergency fund of 3000. which saving strategy would likely be most effective in helping her me

dybincka [34]

Answer:

Save money by a job

Step-by-step explanation:

She can help peoplw, oe get a small job and save up :)

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3 years ago