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2 years ago

Help answer this question asap

Mathematics

1 answer:

olya-2409 [2.1K]2 years ago

7 0

Answer:

∠NMJ and ∠KJH

Step-by-step explanation:

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Andrea had 32 problems to do for mathematics homework over a weekend. She did of the problems on Friday night, and on Saturday s

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none of she did what was left on saturday

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2 years ago

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Sara can type 90 words in 4 minutes. About how

LiRa [457]

Answer:

225 words

Step-by-step explanation:

In order to find the answer to this question we have to find how many words she writes in 1 minute. To do this you need to divide 90 words by 4 minutes:

(90)/4 = 22.5 words/minute

Now that the words per minute is found, we can multiply it by the 10 minutes to find how many words she can write in 10 minutes:

(22.5)(10) = 225

Therefore, Sara can type about 225 words in 10 minutes.

I hope this helps!!

- Kay :)

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2 years ago

A pyramid-shaped vat has square cross-section and stands on its tip. The dimensions at the top are 2 m × 2 m, and the depth is 5

Strike441 [17]

Answer:

the water level increases at a rate of 1.718 m/min when the depth is 4 m

Step-by-step explanation:

the volume of the pyramid is

V = (1/3)(height)(area of base) = 1/3 H*L²

For the diagonal in the pyramid

tg Ф = Side Length/ Height = L / H = x / h

where h= depth of water , x= side of the corresponding cross section

therefore x= L *h/H

the volume of the water is

v= 1/3 h*x² = 1/3 (L/H)² h³

in terms of time

v = Q*t

then

Q*t = 1/3 (L/H)² h³

h³ = 3*(H/L)² *Q *t

h = ∛(3*(H/L)² *Q *t) = ∛(3*(H/L)² *Q) *∛t = k* ∛t , where k=∛(3*(H/L)² *Q)

h = k* ∛t

then the rate of increase in depth is dh/dt

dh/dt = 1/3*k* t^(-2/3)

since

t = (h/k)³

dh/dt = 1/3*k* t^(-2/3) = 1/3*k* (h/k)³ ^(-2/3) = 1/3*k* (h/k)^(-2) = 1/3 k³ / h²

= 1/3 (3*(H/L)²*Q) / h² = (H/L)²*Q /h²

dh/dt= [H/(h*L)]²*Q

replacing values, when h=4m

dh/dt= [H/(h*L)]²*Q = [5m/(4m*2m)]² * (3m³/min)= 1.718 m/min

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3 years ago

If the length of one leg of a right triangle is 3 and the hypotenuse is √34, what is the length of the other leg?

Elenna [48]

To answer this question you must use Pythagorean theorem

$a^{2} +b^{2}=c^{2}$

a and b are the legs (the sides that form a perpendicular/right angle)

c is the hypotenuse (the side opposite the right angle)

In this case...

a = 3

b = unknown

c = √34

^^^Plug these numbers into the theorem

$3^{2} +b^{2} =√34^{2}$

Simplify

9 + b² = 34

solve for b

$b^{2}$ = 25

Take the square root of both sides to cancel out the square from the b

√b² = √25

b = 5

Hope this helped!

~Just a girl in love with Shawn Mendes

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3 years ago

Find the surface area of the prism. Explain how you got your answer pls

zavuch27 [327]

Answer:

Step-by-step explanation: I’m too lazy to do it but just substitute the values into the formula of a Rectangular prism Surface Area

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2 years ago

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