All categories

4 years ago

Solve. 2x2 + 3x = –8

1 answer:

6 0

$2x^2+3x=-8\ \ \ \ |add\ 8\ to\ both\ sides\\\\2x^2+3x+8=0\\a=2;\ b=3;\ c=8\\\\\Delta=b^2-4ac\\\\\Delta=3^2-4\cdot2\cdot8=9-64=-75 \ \textless \ 0\\\\Answer:No\ real\ solution$

You might be interested in

Choose the pair of events that is mutually exclusive.

barxatty [35]

Answer:

even numbers greater than 50 and prime numbers greater than 50

Step-by-step explanation:

An event can be considered as mutually exclusive in probability and statistics when two sample propositions cannot be held as true by any means. Therefore, the pair that clearly illustrates a mutually exclusive event would be "even numbers greater than 50 and prime numbers greater than 50."

The only prime number that is even is 2, so even numbers over 50 would be divisible by 2, and then not prime.

5 0

3 years ago

Help now pls !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

meriva

D. 25

This is the answer

5 0

3 years ago

Read 2 more answers

How do I find the Axis of Symmetry for a parabola

soldier1979 [14.2K]

Answer:

Explanation given below.

Step-by-step explanation:

The first step is to put the parabola in the form $ax^2+bx+c$ , which is the standard form of a parabola

Note: a is the coefficient before x^2 term, b is the coefficient before x term, and c is the independent constant term

The axis of symmetry divides the parabola symmetrically. The axis of symmetry has the equation $x=-\frac{b}{2a}$

Where a and b are the respective values shown above

So, that is how you get the axis of symmetry of any parabola.

4 0

3 years ago

Read 2 more answers

Ann purchased a prepaid phone card for $20. Long distance calls cost 11 cents a minute using this card. Ann used her card only o

inn [45]

Answer:

I believe the answer is 33 minutes.

Step-by-step explanation:

20$-16.37 is 3.63$

.11cents × 33 minutes is 3.63$

4 0

3 years ago

jessica weighs x+34 pounds and Ronda weighs 12 pounds less. If Jessica gains 5 pounds and Ronda loses 2 pounds, what is the sum

Vladimir [108]

Answer:

2x+59.

Step-by-step explanation:

Let J represent Jessica's weight and R represent Ronda's weight.

Jessica weighs x+34 pounds. Thus:

$J=x+34$

Ronda weighs 12 pounds less than Jessica. In other words:

$R=J-12=(x+34)-12\\R=x+22$

The sum of their weights, therefore, is:

$J+R\\=(x+34)+(x+22)=2x+56$

Now, if Jessica gains 5 pounds and Ronda loses 2 pounds, the net gain of the total weight would be 3 pounds. Thus, we only need to add 3 to the original total to find the sum of their new weights:

$2x+56+3=2x+59$

The sum of the new [weights] is represented by 2x+59.

8 0

3 years ago