MATHEMATICS HIGH SCHOOL

What is the discriminant of the quadratic equation 2x + 5x2 = 1?–18
–16
22
24

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

the discriminant of the quadratic equation $2x + 5x^2 = 1$

Write the equation in the form of ax^2 +bx+c=0

$2x + 5x^2-1=0$

$5x^2+2x-1=0$

To find out discriminant we use formula

$b^2-4ac$

From the given equation the value of a=5, b= 2 and c=-1

Now we plug in the values in the formula

$b^2-4ac=2^2-4(5)(-1)=24$

Answer 2

Answer:

Answer:

Step-by-step explanation:

From this equation the value of a=5, b= 2 and c=-1

Now we plug in the values in the formula

Related Questions

Use an algebraic equation to solve the problem. The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each side if the perimeter of the triangle is 90 cm? A. 10.5 cm, 11.5 cm, and 12.5 cm B. 22.5 cm, 30 cm, and 37.5 cm C. 7.5 cm, 11.5 cm, and 32.1 cm D. 19.3 cm, 25.7 cm, and 32.1 cm
The function d(h)=50+45hd(h)=50+45h represents the distance a family traveled, in miles, h hours after they stopped for lunch.What does the value 45 represent in this situation? 1.Before lunch, the family traveled at a speed of 45 mph. 2.The family drove 45 miles after they stopped for lunch. 3.The family drove 45 miles before they stopped for lunch. 4.After lunch, the family traveled at a speed of 45 mph.
Liz polishes rings for a jeweler. She can polish 9 rings per hour. How many rhours will it take her to polish 315 rings?
chef dianapurchased 10 /1half pounds of beefand 5 1half pounds of pork to make meatloaf for her restaunant . on the weekend she used 13 and 2thirds pounds of meat how much does she have left.
"A survey reported that out out 50 teenagers 9 said they get their news from a newspaper at this rate how mant 300 teenagers would get a newspaper"

Approximately 15% of the shirts at windsor and best garment factory are labeled irregular and di not receive the windsor and best label. At this rate how many shirts neef to be made to produce approximately 500 Windsor and Best shirts are not irregular?

Answers

500 is 15% less than the number that need to be made, because 15% of
the number that are made will be irregulars.

Remember that 15% = 0.15

500 = 85% of the number.

500 = 0.85 of the number.

Divide each side by 0.85 :

The number = 500 / 0.85 = 589 shirts

Given f(x) = –5x + 1, what is f(–2)?A.
3/5

B.
-9

C.
11

D.
1

Answers

-5(-2)+1 10+1=11 Your answer is C

As viewed from a cliff 340 feet above sea level, a ship is 450 feet from the shore. What is the angle of depression from the cliff to the ship on the water below?

Answers

the angle of depression is equal to angle of elevation at ship
let m be the angle
tan m=340/450=0.76
therefore m=37.073 degrees

Help with writing equations.
The pictures below have the questions I need help with.

Answers

I'm sure you know how to find the slope of a line if you know 2 points
on it ... The slope is ...

(difference in y-values) / (difference in x-values) .

Right ?

OK. Each line in these tables is a point on the graph of the table.
Pick two points from the table, and you can get the slope of the line
from them.

The first table (Plan-A) has these points in it:

1 . . . . . $20.15
2 . . . . . $20.30
3 . . . . . $20.45
4 . . . . . $20.60

You want to find the equation of the line with these 4 points on it.
That means you need to find the slope and the intercept of the line.
Take any two points straight from the table. I'll use the first two:

1 . . . . . $20.15
2 . . . . . $20.30

There you have two points on the line: (1, 20.15) and (2, 20.30) .
The slope is (difference in 'y') / (difference in 'x').

Difference in 'y' = (20.30 - 20.15) = 0.15
Difference in 'x' = (2 - 1) = 1

Slope of the line = (0.15) / 1 = 0.15
(What that really means is 15 cents per minute on Plan-A.)

Now you know that the equation of the line is [ y = 0.15x + intercept ].

Can you think of a way to find the intercept ?
Remember ... every point in the table is on the line.
So why not just take one of these points in the table, put it into the part of the equation that you already have, and watch the intercept fall out ?
You could use any point at all from the table.
I'll use the 3rd one.

y = 0.15x + intercept

20.45 = 0.15(3) + intercept

20.45 = 0.45 + intercept

Subtract 0.45 from each side: 20.00 = intercept

The equation of the graph for Plan-A is Charge = 0.15(minutes) + $20.00
===============================

Plan-B:

First two points:

Difference in y-values = (8.00 - 6.50) = 1.50
Difference in x-values = (10 - 5) = 5

Slope of the line = (1.50) / (5) = .30 (30 cents per minute)
Intercept = 5.00

Charge = 0.3(minutes) + $5.00
======================================

Plan-C:

Slope = 4.50 / 10 = 0.45
Intercept = zero
=================================

Plan-D:

Slope = (16.50 - 11.00) / (30 - 20) = 5.5/10 = 0.55
Intercept = zero

In each plan, the intercept is the cost just to sign up, before you use
the phone, and then the slope is the cost for each minute of talking on it.

1235678 has how many tens in it? how many hundreds in it? and how many thousands? explain

Answers

My guess:
It has 7 tens because the 7 is in the tenths place.
It has 6 hundreds in it because a 6 is in the hundredths place.
And 5 thousands because a 5 is in the thousandths place.

My second mathematical guess:
123,567.8 tens because 12345678 divided by ten is that.
123456.78 hundredths because ^^^hundreds
12345.678 thousandths because^^^ thousands
Or another explanation for my second guess is each 0 it has in it is another decimal place moved to the left of the digits 12345678.

Hahaha hope I helped. It's just a guess. Lol

7 tens, 6 hundreds, and 5 thousands.

What adds to negative ten and multiplies to six