3 years ago

How do the real solution of a quadratic equation show on a graph of that equation?

Mathematics

1 answer:

NeX [460]3 years ago

5 0

Answer:

They show as intersections with the x-axis

Step-by-step explanation:

For example, the quadratic y = x² - 1 has roots x = -1 and x = 1.

They show on the graph as intersections of the parabola with the x axis at x = -1 and x = 1.

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A box contains 87 coins, only Dimes and nickels. The amount of money I the box is $5.45. How many dimes and how many nickels are

Slav-nsk [51]

Write the situation as a simultaneous eqution:
x+y=87
10x+5y=545

Now solve for y by multiplying the whole of the first equation by the coefficient of x:
10x+10y=870
10x+5y=545

5y=325
y=65 nickels in the box
x+y=87
x=22 dimes in the box
To prove this is correct, we do (10 x 22)+(5 x 65)=545 cents ($5.45)

3 0

3 years ago

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There are 40 vehicles in the parking lot. Twenty percent of the vehicles are pick-up trucks. How many pick-up trucks are in the

mart [117]

Answer:

Step-by-step explanation:

20% of 40 is 8.

^.^

- Amanda

8 0

3 years ago