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2 years ago

Braincells = lost can someone fill in the blank

Mathematics

2 answers:

Sergio [31]2 years ago

8 0

Answer:

I believe it’d be 5

Step-by-step explanation:

AH || BC

AH || FG

AH || DE

AB || HG

CD || FE

Masteriza [31]2 years ago

3 0

<h3>Answer: 8 pairs of perpendicular lines</h3>

===============================================

The 8 perpendicular pairs of lines are:

AB and BC
BC and CD
CD and DE
DE and EF
EF and FG
FG and GH
GH and HA
HA and AB

I started with AB and worked counterclockwise around the figure so that I could methodically list each pair of perpendicular lines. Perpendicular lines always form a 90 degree angle. While the square angle markers aren't there, I'm assuming your teacher meant to put them in.

Alternatively, you can count the number of right angles and you'll also get 8 as the answer.

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Convert the following numbers into scientific notation. ( i did them but I feel like they wrong can y’all correct them if they a

ladessa [460]

Answer:

only 4 is incorrect...

1,450,000 = 1.45 x $10^{6}$ NOT

1,450,000 = 1.45 x $10^{7\\}$

Step-by-step explanation:

4 0

2 years ago

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trapecia [35]

Answer:

Question 1) 10+32

 = 42

Question 2) 8+9

Step-by-step explanation:

<h3>I hope this helps!!</h3>

3 0

2 years ago

Read 2 more answers

The cost to rent a car from Hertz is $15 for the day plus $0.50 per mile that you drive that day. The cost to rent a car from En

aniked [119]

Answer:

40 miles.

Step-by-step explanation:

Given that the cost of renting a car in Hertz is $ 15 per day plus $ 0.50 for each mile traveled, while in Enterprise the cost is $ 25 per day plus $ 0.25 per mile traveled, to determine how many miles should be traveled to incur the same expenditure in both companies the following calculation must be made:

25 - 15 = 10

0.50 - 025 = 0.25

10 / 0.25 = 40

Therefore, to incur the same cost, 40 miles must be traveled, which is verified with the following calculation:

25 + 0.25 x 40 = 35

15 + 0.50 x 40 = 35

5 0

2 years ago

Find the area of the helicoid (or spiral ramp) with vector equation r(u, v) = ucos(v) i + usin(v) j + v k, 0 ≤ u ≤ 1, 0 ≤ v ≤ 9π

Natasha2012 [34]

Let $H$ denote the helicoid parameterized by

$\mathbb r(u,v)=u\cos v\,\mathbf i+u\sin v\,\mathbf j+v\,\mathbf k$

for $0\le u\le1$ and $0\le v\le9\pi$ . The surface area is given by the surface integral,

$\displaystyle\iint_H\mathrm dS=\iint_H\|\mathbf r_u\times\mathbf r_v\|\,\mathrm du\,\mathrm dv$

We have

$\mathbf r_u=\dfrac{\partial\mathbf r(u,v)}{\partial u}=\cos v\,\mathbf i+\sin v\,\mathbf j$
$\mathbf r_v=\dfrac{\partial\mathbf r(u,v)}{\partial v}=-u\sin v\,\mathbf i+u\cos v\,\mathbf j+\mathbf k$
$\implies\mathbf r_u\times\mathbf r_v=\sin v\,\mathbf i-\cos v\,\mathbf j+u\,\mathbf k$
$\implies\|\mathbf r_u\times\mathbf r_v\|=\sqrt{1+u^2}$

So the area of $H$ is

$\displaystyle\iint_H\mathrm dS=\int_{v=0}^{v=9\pi}\int_{u=0}^{u=1}\sqrt{1+u^2}\,\mathrm du\,\mathrm dv$
$=\dfrac{9(\sqrt2+\sinh^{-1}(1))\pi}2$

5 0

3 years ago

Which equation has a slope of 1/4 and a y-intercept of 3

inysia [295]

Answer:

y= 1/4x + 3

F(x)= 1/4x + 3

Step-by-step explanation:

Y= Mx+B

M is slope

B is y-intercept

3 0

2 years ago