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4 years ago

Solve for x, 2x2 + x - 3 = 0

Mathematics

1 answer:

Murrr4er [49]4 years ago

4 0

2x^2 + x - 3 = 0
(x-1)(2x+3) = 0
x = 1 , x = - 3/2

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2. Evaluate the expression for a = –1 and b = 5. Show your work. 5a – 7b + b2

Katen [24]

Greetings!

Input the values which represent the variables:
$=5a-7b+b^2$

$=5(-1)-7(5)+(5)^2$

Solve following the Order of Operations:
$=5(-1)-7(5)+25$

$=-5-7(5)+25$

The Answer Is:
$\boxed{-15}$

I hope this helped!
-Benjamin

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3 years ago

A marble is randomly selected from a bag containing three red marbles to blue marbles and three green marbles what is the probab

mote1985 [20]

Answer: 1/3

aka:33.33%

Step-by-step explanation:

3/9=1/3

3 0

3 years ago

Error 404.

Black_prince [1.1K]

Answer:

Step-by-step explanation:

404 Error it occurs when a question is INPROPER like if it is not related to subjects it will be get deleted.

Then if a question is INCOMPLETE it will be deleted mostly it will be deleted in asking question paper this sorts of one because While asking a question paper one mention all detail like which class which board for which exam you needed question paper.

Then it also occur in answers. Some times you might think how my answer got deleted?

> If your answer does not have clear answer it will be deleted

> If your answer is copied from other websites it will be deleted

> And then if your answer is wrong it will be given an notification from moderator to EDIT your answer . If its not edited it will be deleted automatically

To resolve this first you should be always aware of the brainly rules

7 0

3 years ago

A neighborhood development that is 4 acres is to be divided into 2/3 acre lots. How many lots can be created?

mihalych1998 [28]

6 lots can be created

Solution:

Given that neighborhood development that is 4 acres is to be divided into $\frac{2}{3}$ acre lots

To find: number of lots created

From given information,

Total acres = 4

one lot = $\frac{2}{3} \text{ acres }$

So number of lots created can be found by dividing the total acres by acre of 1 lot

Thus the formula is:

$\text{ Number of lots } = \frac{\text{ total acres }}{\text{ acre of 1 lot }}$

Substituting the values we get,

$\text{Number of lots } = \frac{4}{\frac{2}{3}} = 4 \times \frac{3}{2} = 6$

Thus 6 lots can be created

6 0

4 years ago

three friends shared a taxi ride from the airport to their hotel. After adding 7.00 tip the friends divided the cost of the ride

Zielflug [23.3K]

What did each friend pay, where c is the cost of the trip, not including the tip.

1 / 3 ( c+7.00)=11.25
Multiply both sides by 3
c + 7 = 33.75
Subtract 7 from both sides
c = 26.75

3 0

3 years ago

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