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3 years ago

Please help me with this, and thx in advance

Mathematics

1 answer:

lianna [129]3 years ago

5 0

X + 5 = 20 is the answer

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Quadratic equations Please Help Me!!!!!!

igor_vitrenko [27]

The roots are 1 +√7 and 1 -√7.

<h3>What is Quadratic equation?</h3>

A quadratic equation in the variable x is an equation of the form ax² + bx + c= 0, where a, b, c are real numbers, a≠0

Given equation:

y= x²+2x-6

First,

Half the coefficient of x and add and subtract the square of (b/2)

y= x²+2x-6+(1)²-(1)²

y= x²+2x+(1)² -6 -(1)²

y= (x+1)² -7

Now, equate y=0

(x+1)² -7 =0

(x+1)² = 7

x+1= ±√7

x=1 ±√7

Hence, the roots are 1 +√7 and 1 -√7.

Learn more about quadratic equation here:

brainly.com/question/1962219

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7 0

2 years ago

Im trying to pass the hardest quiz in the world(will give brainliest) the first question is

Ymorist [56]

Whatever your color eyes are

hope this helps

5 0

3 years ago

Read 2 more answers

The school sold 200 tickets to play. Student tickets are $4 and adult tickets are $6. If they made a total $930 how many of each

r-ruslan [8.4K]

$200 + \div 4 =$
$50$
$200 \div 6 =$
$33 \infty$
There was 50 student tickets sold for the play.
There was 33 infinity adult tickets sold for the play

5 0

3 years ago

Function h(x) = x + 4<br> If your input was 2, what is your output?

Natalka [10]

Answer:

h(2)=6

Step-by-step explanation:

just plug in 2 where you have an x, and you’d have 2 + 6, which equals 6

3 0

3 years ago

Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. Th

dexar [7]

Answer:

The labor fee is $14.25, each quart of oil costs $2.25.

Step-by-step explanation:

Let $x be thee price of each quart of oil and $y be a flat fee for labor.

1. If the oil change for one car required 5 quarts of oil, then these 5 quarts cost $5x and together with a flat fee for labor it cost $25.50. Thus,

5x+y=25.50.

2. If the oil change for another car required 7 quarts of oil, then these 7 quarts cost $7x and together with a flat fee for labor it cost $30.00. Thus,

7x+y=30.00.

3. Subtract from the second equation the first one, then

$7x+y-(5x+y)=30.00-25.50,\\ \\7x+y-5x-y=4.50,\\ \\2x=4.50,\\ \\x=\$2.25.$

Substitute it into the first equation:

$5\cdot 2.25+y=25.50,\\ \\y=25.50-11.25,\\ \\y=\$14.25.$

The labor fee is $14.25, each quart of oil costs $2.25.

6 0

3 years ago