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2 years ago

Please help ASAP I need done. Thanks

Mathematics

2 answers:

Irina18 [472]2 years ago

7 0

Answer:

man what is this....I haven't learnt this one yet

DiKsa [7]2 years ago

6 0

Rise=4 Run=1. Therefore, the slope is -4/1, or negative four over one. It is decreasing, down four, one right.

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A part of the city of New Orleans is 6 feet below sea level. We can use "-6 feet" to describe its

andriy [413]

Answer:

[-8]

Step-by-step explanation:

6 0

3 years ago

I will give brainliest thanks

bogdanovich [222]

Answer:

The correct answer is A which is

$\:$

Step-by-step explanation:

The angle of elevation from the submarine to the boat is $\:$ .

This is the angle through which an observer from the submarine will raise the head before seeing the boat.

See diagram in the attachment for illustration.

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4 years ago

A projectile is fired with muzzle speed 250 m/s and an angle of elevation 45° from a position 30 m above ground level. Where doe

qaws [65]

The projectile's horizontal and vertical positions at time $t$ are given by

$x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ\,t$

$y=30\,\mathrm m+\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ\,t-\dfrac g2t^2$

where $g=9.8\dfrac{\rm m}{\mathrm s^2}$ . Solve $y=0$ for the time $t$ it takes for the projectile to reach the ground:

$30+\dfrac{250}{\sqrt2}t-4.9t^2=0\implies t\approx36.2458\,\mathrm s$

In this time, the projectile will have traveled horizontally a distance of

$x=\dfrac{250\frac{\rm m}{\rm s}}{\sqrt2}(36.2458\,\mathrm s)\approx6400\,\mathrm m$

The projectile's horizontal and vertical velocities are given by

$v_x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ$

$v_y=\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ-gt$

At the time the projectile hits the ground, its velocity vector has horizontal component approx. 176.77 m/s and vertical component approx. -178.43 m/s, which corresponds to a speed of about $\sqrt{176.77^2+(-178.43)^2}\dfrac{\rm m}{\rm s}\approx250\dfrac{\rm m}{\rm s}$ .

7 0

3 years ago

Rewrite the expression log(5) 7 using only the natural logarithm.

PSYCHO15rus [73]

Do you mean log(5)^7 ?

4 0

3 years ago

Please help me! Write the slope intercept form of an equation for the line that passes through (0,3) and is perpendicular to 9x-

lesya692 [45]

Answer:

y = -4/9x + 3

Step-by-step explanation:

Keep in mind:

- the equation for slope-intercept form is y = mx + b.

- "y" means output, "x" means input, "m" means slope, and "b" means y intercept

The first step in this equation is to turn 9x - 4y = -8 into slope intercept form.

Step 1: subtract 9x from both sides to begin to isolate y.

9x - 4y = -8

-4y = -9x - 8

Step 2: divide both sides by -4 to further isolate y.

y = 9/4x + 2

Now, we have the equation for the perpendicular line. Remember, the slope of a line is the opposite reciprocal of the slope of the line perpendicular to it.

This means that the slope of the line we are trying to find the equation for is -4/9.

Now that we have a slope and a point the line passes through, (0, 3), we can find the equation. Plug the coordinates of the point and the slope into the equation for slope-intercept form.

3 = -4/9(0) + b

To find the equation, solve for b.

Step 1: Simplify -4/9(0)

3 = 0 + b

Step 2: Simplify 0 + b

3 = b

Now that we know b and m, we have our equation.

The final answer is y = -4/9x + 3.

6 0

4 years ago