Solve the following systems mathematically using substitution -4x-3y=12y=2x-14

Mathematics

1 answer:

miv72 [106K]3 years ago

6 0

Answer:

(3,-8)

Step-by-step explanation:

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Given that f(x) = x2 – 7x – 1, g(x) = 2x – 3, and h(x) = 4x – 5 find each function.

Lilit [14]

Answer:

Step-by-step explanation:

(f+g)(x) = f(x) + g(x)

now plug in the expressions of f(x) and g(x) :

(f+g)(x) = $x^{2} -7x-1 + 2x-3$

we combine like terms we get :

(f+g)(x) = $x^{2} -7x+2x -1-3$

we simplify we get :

(f+g)(x)= $x^{2} -5x-4$

so the answer is A)

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3 years ago

Shen’s mother gave him $10 to go buy groceries. He picked up a gallon of milk for $3.49, three pounds of oranges that cost $1.14

svet-max [94.6K]

Gallon of milk: $3.49
3lbs oranges: $1.14(3) = $3.42
Box of cereal: $3.46

Front end estimation is taking the number in front and the rest of the numbers coming after it will be zeroes.

Using front end estimation:
$3.49 => $3.00
$3.42 => $3.00
$3.46 => $3.00

Add all these up; Shen estimated the total cost of the groceries would be $9.00.

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4 years ago

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Jason and Eddy are traveling from Jacksonville to Miami, which is a distance of 382 miles. According to the American Automobile

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Answer:

The value is $v = 49.23 \ mph$