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Mathematics

2 answers:

Ivahew [28]3 years ago

7 0

2x+20 for the first one

algol133 years ago

3 0

For 3(x-2)+14,
Use distributive property:
3x-6+14
then add the like terms:
3x+8

For 9.1-4(m+3.2)
Distribute -4:
9.1-4m-12.8
add like terms:
-4m-3.7

For 5n+1/2(8n-7)
Distribute the 1/2:
5n+8/2n-7/2
simplify:
5n+4n-7/2
add like terms"
9n-7/2

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I really need help with this problem steps

melamori03 [73]

Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20

Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation
-2 (7y+10)+14y=-20
Distribute
-14y-20+14y=-20
Add and simplify
Us cancel out =0
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10)
Let me know if I have answered your question

5 0

3 years ago

Inverse of <br>f(X) = 3x - 7

poizon [28]

Step-by-step explanation:

y = f(X) = 3x - 7

3x = y + 7

x= (y +7)/3

f ^-1(x) = (x + 7)/3

5 0

2 years ago

Ratios equivalent to 4:12?