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Kobotan [32]
3 years ago
15

Need help please I’ll mark as brainliest !! “Use all three formulas”

Mathematics
1 answer:
klemol [59]3 years ago
7 0

Answer:

-21

Step-by-step explanation:

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Three oblique pyramids have the same regular square base. Which one has a volume of 15 cubic units if the area of the bases are
deff fn [24]

Answer:

The one which has a height of 3 units. H=3

Step-by-step explanation:

Well, the volume of pyramid is equal to the area of base multiply by the height of pyramid and divide by 3. Writing as a formula it can be expressed as V=(A*H)/3 where V is volume of pyramid, A is area of base and H is the height of pyramid. If V=15 cubic units and A=15 square units, H should be equal to 3 (to be cancelled out by 3. Please look at formula above) in order to make V=15.

8 0
3 years ago
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(_____) + (7 − 3i) + (5 + 9i) + 13i = 10 − 5i. whats the missing term?
Kobotan [32]
-2 - 24i, you can easily sum all real and imaginary parts to find this.
Alternatively, you can of course write -(2+24i)
5 0
4 years ago
I really need help on number 6 please !!! :(((
malfutka [58]

I am pretty sure the answer to this is .18 :)

7 0
3 years ago
What is the simplest form of the expression?
Stella [2.4K]
The answer is C. 4√5 

To calculate this, we must find the greatest common divisor of these 3 numbers √20,√45, and √5.
The greatest common divisor is √5:
\sqrt{20} = \sqrt{5*4} = \sqrt{5} * \sqrt{4} = \sqrt{5} *2= 2\sqrt{5}
\sqrt{45} = \sqrt{5*9} = \sqrt{5} * \sqrt{9}=\sqrt{5}*3 = 3\sqrt{5}

Therefore,
\sqrt{20} + \sqrt{45}- \sqrt{5}=2 \sqrt{5} +3\sqrt{5}-1\sqrt{5}=\sqrt{5}(2+3-1)=4\sqrt{5}
6 0
3 years ago
Read 2 more answers
What is true about the slope of the line graphed?
IRINA_888 [86]

Answer:

B, slope is negative

Step-by-step explanation:

if the line, starting from left, goes down then the slope is negative

7 0
3 years ago
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