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Anni [7]
3 years ago
11

Please help! Thanks so much! Will mark brainiest if you answer all!!! :)

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
3 0
Answer is A) -64m^3 -60n^2
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HELP QUICK PLEASE 20 POINTS
trasher [3.6K]

Answer:

-2

Step-by-step explanation:

-5n + 18

where n is the number of the term


4 0
3 years ago
Read 2 more answers
Expand and simplify: 
Allisa [31]
1.\\(n-2)(3n+7)+2n(2n+3)\\\\=n\cdot3n+n\cdot7-2\cdot3n-2\cdot7+2n\cdot2n+2n\cdot3\\\\=3n^2+7n-6n-14+4n^2+6n\\\\=7n^2+7n-14

==============================================================

2.\\4x^2-25=(2x)^2-5^2=(2x-5)(2x+5)
5 0
3 years ago
Read 2 more answers
I need help with question number 2.. I have a test coming up and i’m really lost
Korvikt [17]

(9a+5b-7)+(4b-2)

Add the like terms

9a+9b-9

6 0
3 years ago
Find the equation for the linear function that passes through the points ( see photo)
Sidana [21]

Answer:

f(x) = (-4/5)*x + 4

Step-by-step explanation:

The line which passes through these points will decrease y by 12 for every x increase of 15. This is the same as decreasing y by 4 for every x increase of 5. This means the slope (rise over run) is -4/5. If this is applied to the first point to find what y is at 0, then the point (0, 4) is on the line.

This means that f(x) = (-4/5)*x + 4

6 0
3 years ago
Read 2 more answers
Will mark brainliest!!
olga55 [171]
Subtract the two equation from each other
-3x-7y=-66
-10x-7y=-24
--------------------
7x =-42
x=-6
by substituting in equation 1
(-3)(-6)-7y=-66
18-7y=-66
-7y=-84
y=12
so to check we substitute in the first equation

(-3*-6)-(7*12)=-66
18-84=-66
-66=-66
we check the second equations
-10(-6)-7(12)=-24
60-84=-24
-24=-24
8 0
3 years ago
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