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3 years ago

Help help help help please

Mathematics

2 answers:

Gnoma [55]3 years ago

5 0

4Th option is correct ✔️ ✔️

melamori03 [73]3 years ago

5 0

Answer:

Maybe Option D but I'm not sure

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A geometric progression has a third term of 20 and a sum of infinity which is 3 times the first term. Find the first term

Anna007 [38]

Answer: the first term is 45

Step-by-step explanation:

Step 1: The formular for the nth term is ar^n-1 and since we're solving for the third term ar^3-1 = ar² which is equal to 20

So ar²= 20 and we make this equation i

Step 2: the formular for the sum of infinity is Sn = a/(1-r) and according the question the sum of infinity is equals to 3 *A ( A means the first term)

Further simplification gives us

3a= a/(1-r)

We simplify Futher by multiplying both sides by (1-r)

3a.(1-r) = a/(1-r).(1-r)

3a(1-r)=a

= 3a-3ar=a

Make 3ar the subject of the formula

3ar= 2a and lets make this equation (ii)

Step 3: From the first equation since ar²=20, let's make a the subject of the formula by dividing both sides by r²

Ar²/r² = 20/r²

A=20/r²lets make this equation (iii)

Step 4: subtitle a as 20/r² into equation (ii)

Since 3ar=2a

Then 3.(20/r²).r = 2. 20/r²

= (60/r²) .r = 40/r²

60/r = 40/r2

Multiplying both sides by r² gives us

60r = 40

Divide both sides by 20 gives us

= 3r= 2

Divide both sides by 3 gives us

= r = 2/3

Step 5: substitute r for 2/3 in equation i

ar²= 20

a. (2/3)2 = 20

= a.4/9 = 20

= 4a = 180

= a = 180/4

a = 45

5 0

3 years ago

Use the cards to create an expression that is equivalent to 10 to the fifth power.

Ne4ueva [31]

10×5 is the answer. not sure though

3 0

3 years ago

What is the product?<br><br> (5r + 2)(3r − 4)

bazaltina [42]

this is the answer 15r^2 − 14r − 8

Murda on the beat so it's not nice

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Hidden Hills, deep off in the main

M&M's, sweet like candy cane

Drop the top, pop it, let it bang (pop it, pop it)

For this life, I cannot change

Hidden Hills, deep off in the main

M&M's, sweet like candy cane

Drop the top, pop it, let it bang (pop it, pop it)

Drop the top, play hide and seek

Jump inside, jump straight to the lake

Take a sip, feel just how I breathe

On freeway, but no, ain't nothin' free (straight up)

Bend laws, bend lanes

Been bustin' bills, but still ain't nothin' change

You in the mob soon as you rock the chain

She caught the waves just thumbin' through my braids (alright)

Heatin' up, baby, I'm just heatin' up (it's lit)

Fiji lover, now they need it is a must

Feelin' stuck, you know how to keep me up

Icy love, icy like a hockey puck

For this life, I cannot change

Hidden Hills, deep off in the main

M&M's, sweet like candy cane

Drop the top, pop it, let it bang (Pop it, pop it)

For this life, I cannot change

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Drop the top, pop it, let it bang

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Yeah, run it back, turn the lights on when I hit up Green Lantern

Yeah, fly the broads, fly the dogs down to Atlanta

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Yeah, If I send one, need the text back 'cause you know what I need

Oh, please (oh please)

Oh me (oh me)

Oh my (oh my)

We been movin', we been movin' for some time (Alright!)

Flexin', flexin' try to exercise

(Exercise, exercise, exercise, exercise)

For this life, I cannot change

Hidden Hills, deep off in the main

M&M's, sweet like candy cane

Drop the top, pop it, let it bang (Pop it, pop it)

For this life, I cannot change

Hidden Hills, deep off in the main

M&M's, sweet like candy cane

Drop the top, pop it, let it bang

8 0

2 years ago

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aleksklad [387]

The answer should be B! Hope this helped :)

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2 years ago

Nancy has a bank account that has a balance of $320 and allows for a maximum of 6 deposits per month. She has decided that each

LenaWriter [7]

Answer: 320,340,360,380,400,420,440

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2 years ago