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dezoksy [38]
3 years ago
11

Which shows the correct way to use the rule "multiply by the reciprocall for the expression below? 5 divided by 2/9

Mathematics
1 answer:
tatuchka [14]3 years ago
6 0
5x9/2 because multiplying by reciprocals are basically flipping the fraction and multiplying.
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Find inverse of y=1/2x+3
yKpoI14uk [10]

Answer:  f⁻¹(x)=2x-6

Step-by-step explanation:

To find the inverse of an equation, you replace y with x and x with y. Then, you solve for y.

y=1/2x+3          [replace y with x and x with y]

x=1/2y+3          [subtract both sides by 3]

x-3=1/2y           [multiply both sides by 2]

y=2(x-3)            [distribute]

y=2x-6

Now, we know the inverse function is f⁻¹(x)=2x-6.

8 0
3 years ago
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2 years ago
Derek had 104 more stamps than Ahmad. Derek then gave 1/9 of his stamps to
Flauer [41]

Answer:

  117

Step-by-step explanation:

Let d represent the number of stamps Derek had at first. After he gave 1/9 of his stamps to Ahmad, Ahmad had (d -104) +(d/9). Derek had 4 times this number after giving away d/9 stamps:

  (d -d/9) = 4((d -104) +d/9)

  (8/9)d = 4d -416 +(4/9)d

  416 = (32/9)d . . . . add 416 -8/9d

  117 = d . . . . . . . . . . multiply by 9/32

Derek had 117 stamps at first.

_____

<em>Check</em>

1/9 of Derek's collection is 13 stamps. 104 less than Derek's collection is 13 stamps.

So, Ahmad started with 13 stamps and was given 13 stamps by Derek. Meanwhile, Derek started with 117 stamps and gave away 13, so ended with 104 stamps. That number (104) is 4 times Ahmad's new number (26), as it should be.

5 0
3 years ago
Number 2 please. i need help fast
mezya [45]

Answer:

81+86+89+96 equals an average of 88. If she wants an average of 90 she needs to score a 93 and 96 on the next two tests.

Step-by-step explanation:

Thanks You For Typing it so i can understand hope this helps

8 0
3 years ago
A rectangle is drawn on a coordinate grid. The equation for one side of the rectangle is 2x – 5y = 9. Which could be the equatio
olga nikolaevna [1]

Answer:

the second 1

Step-by-step explanation:

I hope this helped

7 0
3 years ago
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