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masya89 [10]
3 years ago
7

Wats the answer ~!!!!!!!

Mathematics
1 answer:
shtirl [24]3 years ago
6 0
The answer is c. My dude good luck
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If the 4th and 7th terms of a GP are 250 and 31250 respectively. Find the two possible values of a and r
Over [174]

Answer:

a = 2, r = 5

Step-by-step explanation:

Nth term of a GP = a×r^(n-1)

Where 'a' is the first term and 'r' is the common ratio

4th term = a×r^3 = 250

r^3 = 250/a

7th term = a×r^6 = 31250

a×r^6 = 31250

a×(r^3)^2 = 31250

a×(250/a)^2 = 31250

a×(62500/a^2) = 31250

62500/a = 31250

a = 62500/31250 = 2

a = 2

since r^3 = 250/a,

r^3 = 250/2 = 125

r = (125)^(1/3)

r = 5

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3 years ago
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A car drives 120 miles at a speed of 40 mph. How long did it take?
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Four brother each bought two hotdogs and a bag of chips at the football
jeyben [28]

Answer:

A-$1.65

Step-by-step explanation:

You multiply 1.25 by 4 because each brother bought a bag of chips. Then you subtract that by the total and get $13.20 you divide that by 8 hot dog because each brother got 2 hot dogs. By dividing 8 by the  left over amount from subtracting the chips you get how much each hot dog is worth.

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A grocery store sells a bag of 3 oranges for $2.79. How much would it cost for 4 oranges?
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Answer:

$3.72

Step-by-step explanation:

Divide $2.79 by 3

$0.93 is the price of one orange

$0.93 times 4 is $3.72

Hope this helps!

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3 years ago
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