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Shtirlitz [24]
4 years ago
6

HELP TO MAKE SURE WORK IS CORRECT PLEASE!!!

Mathematics
2 answers:
MrRa [10]4 years ago
4 0

Answer:

20

Step-by-step explanation:

elena55 [62]4 years ago
3 0
(55 + 150 + 325 + 510 + 780 + 990) - (40 + 150 + 300 + 500 + 800 + 1000) = 2810 - 1790 = 20
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Please help me, ill mark brainly :P
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Insert 2 geometric means between -32 and 4
denis23 [38]

Answer:

16, -8

Step-by-step explanation:

Let the terms of the geometric sequence be a, ar, ar^2, ar^3.

We know that a=-32 and thus, -32r^3=4 \implies r=-1/2.

This means ar=(-32)(-1/2)=16 and ar^2=-32(1/2)^2=-8.

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1 year ago
Math multiple choice
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What is the surface area of a cylinder with a 3 m radius and a 13 m height ?
lara [203]

Answer:

301.6 (I rounded)

Step-by-step explanation:

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7 0
3 years ago
Please help! provide thorough explanation and use elimination method!!
ICE Princess25 [194]

Multiply both sides of the second equation by 100 to get rid of the decimals:

0.05<em>n</em> + 0.10<em>d</em> = 1.50

==>  5<em>n</em> + 10<em>d</em> = 150

Multiply both sides of the first equation by -5:

<em>n</em> + <em>d</em> = 21

==>  -5<em>n</em> - 5<em>d</em> = -105

Add the two equations together:

(5<em>n</em> + 10<em>d</em>) + (-5<em>n</em> - 5<em>d</em>) = 150 + (-105)

Notice that the terms containing <em>n</em> get eliminated and we can solve for <em>d</em> :

(5<em>n</em> - 5<em>n</em>) + (10<em>d</em> - 5<em>d</em>) = 150 - 105

5<em>d</em> = 45

<em>d</em> = 45/5 = 9

Plug this into either original equation to solve for <em>n</em>. Doing this with the first equation is easiest:

<em>n</em> + 9 = 21

<em>n</em> = 21 - 9 = 12

So Donna used 12 nickels and 9 dimes.

8 0
3 years ago
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