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Hatshy [7]
3 years ago
9

Explain how you could use mental math to find a 15% tip for a $26 restaurant bill.

Mathematics
1 answer:
alekssr [168]3 years ago
3 0
10% of 26 is 2.60. Now, half of that is 1.30. Add both of them and you get 3.90. Same logic can work for a 20% tip, just double to 10%.
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Which expression is a difference of squares with a factor of 2x + 5? 4x2 + 10 4x2 – 10 4x2 + 25 4x2 – 25
Shtirlitz [24]

Answer:

  4x^2 -25

Step-by-step explanation:

The other factor of the difference of squares is the "conjugate" of the given one: (2x -5). Then their product is ...

  (2x +5)(2x -5) = (2x)^2 -(5)^2 = 4x^2 -25

5 0
3 years ago
Read 2 more answers
How do you do 3(4y-7)=15y+6​
cestrela7 [59]

Answer:

y = 27/7

Step-by-step explanation:

Perform the indicated multiplication:

3(4y-7)=15y+6 becomes:

12y - 21 = 5y + 6

Combining like terms, we get:

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7 0
3 years ago
-3=x/-9 please tell me how to solve this I’m way behind and trying to learn thank you :)
snow_tiger [21]

-3 = x/-9

To make this easier, I'll put it in normal numbers

(-3 = x/-9) -1

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Multiply both sides by nine to take out the division.

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Hope that this helped!

8 0
2 years ago
Find the domain of the function.<br> f​(x)=9x+7
Trava [24]
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5 0
3 years ago
Use distributive property to rewrite each algebraic expression: 15(2+r)
ira [324]

Answer:

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Step-by-step explanation:

I hope this helps and hope u have an Amazing day!!

8 0
3 years ago
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