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3 years ago

Pls, help. Whichever one you want, but whoever does all of them first I will give them the brainiest.

Mathematics

1 answer:

egoroff_w [7]3 years ago

5 0

Answer:

what am i supposed to help with??

Step-by-step explanation:

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Evaluate the expression when a is -5 and y is 7<br> a-5y

Sonbull [250]

Answer:

The answer is -40

Step-by-step explanation:

<h3><u>Given</u>;</h3>

a = -5
y = 7

a – 5y

Now,

a – 5y

(-5) – 5(7)

-5 – 35 = -40

Thus, The answer is -40

<u>-TheUnknownScientist</u><u> 72</u>

8 0

3 years ago

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A particle starts at the point P=(−5,−1,3) when t=0 and moves along a straight line toward Q=(−6,−6,8) at a speed of 9 cm/sec. L

navik [9.2K]

Answer:

Step-by-step explanation:

Given

Particle moves from $P\ (-5,-1,3)\ to\ Q\ (-6,-6,8)$

speed of particle is $v=9\ cm/s$

Unit vector in the direction of vector $\vec{PQ}$ is given by

$\hat{n}=\frac{\vec{Q}-\vec{P}}{|\vec{Q}-\vec{P}|}$

$\hat{n}=\frac{-}{\sqrt{(-1)^2+(-5)^2+(5)^2}}$

$\hat{n}=\frac{}{\sqrt{1+25+25}}$

Now Position of Particle at any time is given by

$\vec{r(t)}=velocity\cdot time\cdot direction$

$\vec{r(t)}=9\cdot t\cdot \frac{}{\sqrt{1+25+25}}$

Parametric vector equation is given by

$x=\frac{-9t}{\sqrt{51}}$

$y=\frac{-45t}{\sqrt{51}}$

$z=\frac{45t}{\sqrt{51}}$

6 0

4 years ago

I need help wit this

Lina20 [59]

Answer:

1. $2

2. $4

3. 2x

Step-by-step explanation:

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4 years ago

Solve the solution (25a²)½

mina [271]

Answer:

25/2 a^2 and the alternative form 12.5a^2

Step-by-step explanation:

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3 years ago

How do you convert a mixed number into a improper fraction

Llana [10]

To convert a mixed number into an improper fraction, you can multiply the denominator of the fraction by the whole number. Then, you add the product with the numerator to get the new numerator. The denominator remains the same.

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3 years ago

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