2 years ago

Solve the quadratic equation numerically (using tables of x- and y-values).

Mathematics

1 answer:

Stells [14]2 years ago

3 0

Answer:

Third Option: $x=6$ or $x=-3$

Step-by-step explanation:

$x^2+9x+18=0$

$(x+6)(x+3)=0$

$x=6$ or $x=-3$

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Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $ 132.

laiz [17]

Let a=price of adult ticket
let c=price of a child's ticket
start out by writing the following system of equations:
3a+4c=132
2a+3c=94
then, multiply the first equation by 2, and the second equation by 3 to get the following system of equations:
6a+8c=264
6a+9c=282
subtract the like terms to get the following equation:
-c=-18
divide both sides by -1 to get rid of the negative to get the price of a child's ticket to be $18. to find the price of an adult ticket, pick one of the original equations to substitute the 18 in for c to find a. for example:
2a+3c=94
2a+3(18)=94
2a+54=94
-54 -54
2a=40
2 2
a=20

or if you decide to use the other equation:
3a+4c=132
3a+4(18)=132
3a+72=132
-72 -72
3a=60
3 3
a=20
either way, you still get an adults ticket to be $20 and a child's ticket to be $18.

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3 years ago

rding to linear pattern. If the initial value of the vehicle is $26,000, and the value ten years later is $0, what will the depr

Verdich [7]

The answer will be 5,200

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3 years ago

What does x equals to if 3( x + 7 ) =57

zepelin [54]

3(x + 7) = 57 |÷3

x + 7 = 57/3

x + 7 = 19 |-7