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3 years ago

Help! Due soon!!!!!!!!!

Mathematics

2 answers:

denis23 [38]3 years ago

8 0

Answer:

78.75

Step-by-step explanation:

450 is increased by 75%

450 + 450*75%

Change to decimal form

450 +450*.75

450+337.5

787.5

Now decrease by 90%

787.5-787.5*90%

Change to decimal form

787.5-787.5*.9

787.5-708.75

78.75

juin [17]3 years ago

5 0

Answer:

78.75

Step-by-step explanation:

450 + (450 x .75) = 787.5

787.5 - (787.5 x .90) = 78.75

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Explain 3(x - 2)= 3x -2 using words numbers and symbols

Shalnov [3]

Answer:

x=.3

Step-by-step explanation:

3(x-2)=3x -2

(1x-2)=3(-1x)=3x -2

3(-1x)=3x -2

+3x +3x

3*2x=2

6x=2

6x/6=2/6

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3 years ago

The 8th term of a GP is -7/32 find its common ratio if its first term is 28

Ugo [173]

<h2>Common ratio = -1/2</h2>

Step-by-step explanation:

$\text{8}^{th}$ term of a Geometric progression is given as $\dfrac{-7}{32}$ . The first term is given as $28$ .

Any general Geometric progression can be represented using the series $a,ar,ar^{2},ar^{3},ar^{4}...\text{ }ar^{n-1}$ .

The first term in such a GP is given by $a$ , common ratio by $r$ , and the $n^{th}$ term is given by $ar^{n-1}$ .

In the given GP, $a=28;t_{8}=ar^{7}=\dfrac{-7}{32}\\\\28r^{7}=\dfrac{-7}{32}\\\\r^{7}=\dfrac{-1}{128}\\\\r=\dfrac{-1}{2}$

∴ Common ratio is $\dfrac{-1}{2}$ .

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3 years ago

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Step-by-step explanation:

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In 1968 the estimated population was 3,559,028,982 people. When this number is written in expanded form in exponents 1 power of

Fed [463]

Hundred thousand because there is a zero in that spot

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3 years ago

(4x-y) to the 3rd power -(4-xy-2) for x=-2 and y=3

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First of all, we can simplify the expression:

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Substitute x=-2 and y=3 to get

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4 years ago