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Troyanec [42]
3 years ago
14

Solve the equation -x^2+5x+9=0

Mathematics
1 answer:
vivado [14]3 years ago
6 0

-x² + 5x + 9 = 0

On comparing this equation to: ax²+bx+c= 0

We get, a = -1; b = 5; c = 9

Solving by quadratic formula,

x = [-b ± √(b²-4ac)]/2a

=> x = [-5 ± √{5²-4(-1)(9)}]/2(-1)

=> x = [-5 ± √(25-(-36)]/-2

=> x = [-5 ± √(25+36)]/-2

=> x = [-5 ± √61]/-2

=> x = [-5 + √61]/-2 or [-5 - √61]/-2

=> x = (-5/-2) + (√61/-2) or (-5/-2) + (-√61/-2)

=> x = (5/2) + (-√61/2) or (5/2) + (√61/2)

So, x = (5/2) + (-√61/2) or (5/2) + (√61/2)

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If Jill is selling lemonade for $1.50 per cup on Tuesday. On Wednesday she is selling the lemonade for the same price and sells
Molodets [167]

Answer:

Jill make $18 on Wednesday

Step-by-step explanation:

Given :Jill is selling lemonade for $1.50 per cup on Tuesday.

To Find :On Wednesday she is selling the lemonade for the same price and sells 12 cups. How much money did she make on Wednesday?

Solution:

Jill is selling lemonade for $1.50 per cup on Tuesday.

Cost of 1 cup of lemonade = $1.5

Cost of 12 cups of lemonade = 1.5 \times 12 =$18

Hence She make $18 on Wednesday

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3 years ago
The polynomial 6x2 + 37x – 60 represents an integer. Which expressions represent integer factors of 6x2 + 37x – 60 for all value
Maslowich
The answer is 3x-4 and 2x+15
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3 years ago
Read 2 more answers
maeve likes to make her salads in advance she made 15 salads for 3 days how many salads does she eat per day unit rate
Tju [1.3M]

The number of salads Maeve eats per day if she made 15 salads for 3 days is 5 salads eaten per day.

<h3>Unit rate</h3>

Unit rate refers to the number of units of the first type of quantity corresponding to one unit of the second type of quantity.

  • Number of salads = 15 salads
  • Number of days = 3 days

Unit rate of salad eaten per day = Number of salads ÷ Number of days

= 15 ÷ 3

= 5 salads eaten per day

A salad is a food made primarily of a mixture of raw or cold ingredients, typically vegetables, usually served with a dressing such as vinegar or mayonnaise.

Therefore, the number of salads Maeve eats per day if she made 15 salads for 3 days is 5 salads eaten per day.

Learn more about unit rate:

brainly.com/question/4895463

#SPJ1

7 0
1 year ago
Y&lt;2x+2 find the slope
Vesna [10]

<em>The slope is 2x.</em>

<em>X represents the slope.</em>

<em>Y represents the total cost or value</em>

<em>The +2 represents the Y-intercept.</em>

<em>I know this all for a fact because the equation is written out in the slope-intercept form which is commonly displayed like this:</em>

<em>Y = MX + B</em>

<em>Hope this helps and have a nice day.</em>

<em>-R3TR0 Z3R0</em>

3 0
3 years ago
Multiply and reduce 4x^2/3*(9/x)3
Lilit [14]
So you follow the steps and i hope this will be easy for you .

4 0
3 years ago
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