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forsale [732]
3 years ago
13

How do I do mental math

Mathematics
2 answers:
irga5000 [103]3 years ago
8 0
In mental math is in your head
wariber [46]3 years ago
7 0
By answering the questions in your head its simple
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If you get this question right I will give you brainlist
Mama L [17]

Answer:

I think 99in

Step-by-step explanation:

3x13=39

5x12=60

39+60=99

6 0
3 years ago
I need answers I’ll cash app 10 dollars
posledela

1. 0 > 3x - 3 - 6

0 > 3x -9

9 > 3x

3 > x

It would be a closed circle starting from 3 going to the right.

2. 4x + 1 - 1 >/ -8

4x >/ -8

x >/ -2

It would be an open circle starting from -2 going to the right.

3. -1 </ 2n + 4 - 5

-1 </ 2n -1

0 </ 2n

Undefined.

4. -6 > 5n + 5 + 4

-6 > 5n + 9

-15 > 5n

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It would be a closed circle going to the right

4 0
2 years ago
Write an exponential function in the form y=ab^xy=ab
Tcecarenko [31]

Answer:

y = 8 · 10ˣ

Step-by-step explanation:

y = abˣ

When x = 0, y = 8.

8 = ab⁰

8 = a

When x = 3, y = 8000.

8000 = 8b³

1000 = b³

10 = b

The function is:

y = 8 · 10ˣ

3 0
2 years ago
Joanne is planning her spring garden. Plants cost an average of $4.95. She will be
olga_2 [115]

Answer:

49.50

Step-by-step explanation:

3 0
2 years ago
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Express x3 + 4x2 – 45x in factored form.
Dafna1 [17]
A is the answer because of x is all the same
5 0
3 years ago
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