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Brums [2.3K]
3 years ago
10

1/7 ÷ 4/9 = _ × _=_​

Mathematics
1 answer:
pogonyaev3 years ago
8 0
1/7 x 9/4 = 9/28

This process to solving division involving fractions is called “keep, change, flip”
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The length of a rectangular pool is 20 feet and the width is 15 feet. The
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Answer:

$255

Step-by-step explanation:

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= 20 x 15 = 300 square foot

So for painting

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So for 300 square foot = $0.85 x 300

= $255

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2 years ago
Evaluate 7 sigma n=1 2(-2)^n-1
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\[\sum_{n=1}^{7} 2(-2)^{n-1}\]
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Joanne has a cell phone plan that charges a flat rate of $97 and $0.10 for every text she sends. Her goal is to spend less than
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I’m pretty sure the answer would be A,because if her bill is $97 and it’s $0.10 every txt she sends then and she wants to spend less then $113 then if you take $113 and subtract it by 97 it gives you 16 then if you divided 16/ 0.10 then it gives you 160 so she is sending atleast 160 txt.
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2 years ago
five consecutive terms of an arithmetic sequence have a sum of 40. The product of the middle and the two end terms is 224. Find
ratelena [41]
Let the five terms be: a, a + d, a + 2d, a + 3d, a + 4d, then
a + a + d + a + 2d + a + 3d + a + 4d = 5a + 15d = 40
i.e. a + 3d = 8
Also, (a + 2d)(a + 3d)(a + 4d) = 224
(a + 3d - d)(a + 3d)(a + 3d + d) = 224
(8 - d)(8)(8 + d) = 224
(8 - d)(8 + d) = 224/8 = 28
64 - d^2 = 28
d^2 = 64 - 28 = 36
d = sqrt(36) = 6
But a + 3d = 8
a + 3(6) = 8
a = 8 - 18 = -10

Therefore, the term of the sequence is: -10, -10 + 6, -10 + 2(6), -10 + 3(6), -10 + 4(6)
= -10, -4, -10 + 12, -10 + 18, -10 + 24
= -10, -4, 2, 8, 14

4 0
3 years ago
Write the expanded form of 5360
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Answer:

5000+300+60+0

Step-by-step explanation:

4 0
1 year ago
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