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krek1111 [17]
3 years ago
14

I NEED HELP QUICK, PLEASE! Find f(-10). f(x) = 7x - 5

Mathematics
2 answers:
Step2247 [10]3 years ago
8 0

f(x) = 7x-5

find f(-10)

replace x with -10

so you have 7(-10)-5

7*-10=-70 - 5 = -75

so f(-10) = -75

gogolik [260]3 years ago
4 0

f(x) = 7x-5

 find f(-10)

 replace x with -10

 so you have 7(-10)-5

7*-10=-70 - 5 = -75

 so f(-10) = -75

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{

3x+5y=2

9x+11y=14

∣⋅(−3)

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9x+11y=14

add both sides of equations

. −4y=8 ∣:(=4)

. y=−2

substitute the value of y to the first equation

3x+5⋅(−2)=2

3x−10=2 ∣+10

3x=12 ∣:3

x=4

Answer: x=4; y=−2→(4; −2)

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