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mixer [17]
2 years ago
14

10. (07.07 LC)

Mathematics
1 answer:
Serhud [2]2 years ago
6 0

Answer:

81

Step-by-step explanation:

(9x - 4)(9x + 4) = ax² - b

81x² - 36x + 36x - 16

= 81x² - 16

=> a = 81

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Please can someone help me work out the missing length​
Otrada [13]
Vol=area x Height

length= 3
breadth= X
Height = 2

area must = half of 42 because to get the volume of 42cm cubed, you had to times the area by 2 so

42 devided by 2 is 21 so to find the length you myst do 21 devided by 3 which is 7

so the missing length is 7cm
8 0
3 years ago
#13 help asap please
zalisa [80]

Answer:

8 pictures / minute

Step-by-step explanation:

16/2 = 32/4 = 48/6 = 64/8 = 8/1

3 0
3 years ago
What is the missing number?<br><br> –3.4 + (–8 + 2) = [ _ + (–8)] + 2
Kisachek [45]
-3.4 + (-8 + 2) = ( _ + (-8) + 2)
-3.4 + (-6) = ( _ + (-8) + 2)
-9.4 = ( _ + (-8) + 2)
-9.4 = ( _ + -6)
Now remember whatever you do to one side you have to do to the other. :)
-9.4 - -6 = -6 - -6
= -3.4
You had to do one side of the equation before you could do the other side because you needed an answer to follow. 
4 0
2 years ago
Read 2 more answers
(2x - 3) + (1x + 2)<br> How do I solve it
aalyn [17]

Answer:

3x - 1

Step-by-step explanation:

Note that you are adding the parenthesis together. In this case, you can disregard the parenthesis. Combine like terms (terms with the same amount of variables):

2x + 1x - 3 + 2

(2x + 1x) + (-3 + 2)

3x + (-1)

3x - 1

3x - 1 is your answer.

~

6 0
3 years ago
Read 2 more answers
What is the next number in the following pattern?
liq [111]
Answer:
A

Explanation:
the common difference is 12. 51+12= 63
6 0
3 years ago
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