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3 years ago

12

How to do quadratics

1 answer:

larisa [96]3 years ago

6 0

First, put your polynomial in standard form(ax²+bx+c=0). Then plug the a,b and c for x=(-b+-√b²-4ac)÷2a. As a result, you can either get one, two or no real answers.

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Giovanni purchased 25tickets to an airshow. the cost of an adult's ticket is $14 and the child's ticket is $8. if the total cost

Masteriza [31]

Giovanni purchased 20 adult tickets and 5 child's tickets.

Step-by-step explanation:

Let,

x = Adult tickets

y = Child's tickets

According to given statement;

x+y=25 Eqn 1

One adult ticket costs $14 and one child ticket costs $8, therefore,

14x+8y=320 Eqn 2

$Multiplying\ Eqn\ 1\ by\ 8\\8(x+y=25)\\8x+8y=200\ Eqn\ 3\\Subtracting\ Eqn\ 3\ from\ Eqn\ 2\\(14x+8y)-(8x+8y)=320-200\\14x+8y-8x-8y=120\\6x=120\\Dividing\ both\ sides\ by\ 6\\\frac{6x}{6}=\frac{120}{6}\\x=20$

Putting value of x in Eqn 1;

$20+y=25\\y=25-20\\y=5$

Giovanni purchased 20 adult tickets and 5 child's tickets.

Keywords: Linear equations, Addition

Learn more about linear equations at:

#LearnwithBrainly

6 0

3 years ago

If anyone could help me with this I'd be very thankful !

Mariana [72]

60% = 0.6 = 3/5
25.5% = 0.255 = 51/200
90% = 0.9 = 9/10
33 1/3 = 0.3333 =
62.5% = 0.625 = 5/8
7.5% = 0.07 = 7/100

6 0

3 years ago

What are the solutions of the equation 2x2−x=32x2-x=3?

klio [65]

I think it'd be x=4 but I'm not 100% sure

8 0

3 years ago

What number is 54% of 125 type an integer or a decimal round to the nearest tenth

eimsori [14]

Answer is 67.5

To get this you must first turn 54% into a decimal.
54%---> .54
125*.54= 67.5
So 54% of 125 is 67.5 <span />

4 0

3 years ago

Read 2 more answers

Part B. Hector said there will be 55 gallon of water in the pool after 11 minutes. Explain how Hector could have found his answe

Alexxx [7]

Is he measured how much gallons was in the pool in the first minute he can times that amount by 11 minutes and ended up with 55 gallons

6 0

2 years ago