Mathematics College

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Find the zeros of the following function f (x) = 2x^2 – x – 10

Answers

Answer 1

Step-by-step explanation:

the formula to find the x values to deliver y=0 results of a squared equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

a, b, c are the constant factors in the 3 terms of a squared equation.

here in our example of 2x² - x - 10

a = 2

b = -1

c = -10

x = (1 ± sqrt(1² - 4×2×-10))/(2×2) =

= (1 ± sqrt(1 + 80))/4 = (1 ± sqrt(81))/4 =

= (1 ± 9)/4

x1 = (1 + 9)/4 = 10/4 = 2 2/4 = 2 1/2 = 2.5

x2 = (1 - 9)/4 = -8/4 = -2

Related Questions

Solve for d.

2d = 6 + 3d

p.s the virus bots of brainly your not slick no one is falling for it

Answers

Answer:

D = -6

Step-by-step explanation:

2d= 6 + 3d

Subtract 3d from each side

-d =6

divide by a -1

d = -6

Answer:

d=(-6)

Step-by-step explanation:

2×(-6)=(-12)=6+(3×(-6))

In 8 hours, Keiko reads 24 chapters of a book.
What is her rate in chapters per hour?

Answers

Answer:

3 chapters per hour

Step-by-step explanation:

24/8 = 3 chapters per hour

how to solve y=-10x+3?

Answers

9514 1404 393

Answer:

  top down: 13, 3, -7, -47

Step-by-step explanation:

You evaluate any equation by putting the numbers in place of the corresponding variables and following the rules of arithmetic.

For x = -1, put -1 where x is and do the math.

  y = -10(-1) +3 = 10 +3 = 13

For x = 0, put 0 where x is and do the math.

  y = -10(0) +3 = 0 +3 = 3

For x = 1, put 1 where x is and do the math.

  y = -10(1) +3 = -10 +3 = -7

For x = 5, put 5 where x is and do the math.

  y = -10(5) +3 = -50 +3 = -47

The table values are 13, 3, -7, -47.

At the aquarium there are 1350 sharks and 600 lion fish, for a total of 1950 fish all together. What is the ratio of fish to lion fish?

Answers

Answer:

2.25 Sharks to 1 lion fish

Step-by-step explanation:

1350 sharks / 600 lion fish =2.25

Suppose you deposit $200 in a savings account that earns 4% per year. Find the simple interest earned in 2 years. Then find the total of principal plus interest.

Answers

9514 1404 393

Answer:

interest: $16account total: $216

Step-by-step explanation:

The amount of interest is given by the simple interest formula:

  I = Prt . . . . where P is the amount earning interest, r is the annual rate, t is the number of years

  I = $200·0.04·2 = $16.00

The simple interest earned in 2 years is $16.00.

__

The total of principal and interest is found by adding those values:

  $200.00 +16.00 = $216.00

The total amount is $216.00.

4 + (8 + 4)3power -5​

Answers

Answer:

i dont know what you want but exact form is 983/243

decimal form is 4.04526748

mixed form 4 [tex]\frac{11}{243}[/tex]

Step-by-step explanation:

A serving size in a party pack of M&Ms is
32 pieces of candy. If the bag contains
38.2 serving sizes of candy, how many
M&Ms are in the party size bag? .

Answers

Answer:

38.2×32=1222.4

-----------------------

Multiply
8.12.30.3

Please help me

Answers

Answer:

8640

Step-by-step explanation:

What is the GCF of (4+16) using the distributive property?

Answers

Answer:

20

Step-by-step explanation:

The GCF of 4 and 16 is 4.

[tex] \frac{4}{4} = 1 [/tex]

[tex] \frac{16}{4} = 4 [/tex]

We can rewrite this using the distribute property like so:

[tex] 4(1 + 4)[/tex]

Using the distribute property:

[tex] = 4 + 16[/tex]

[tex] = 20[/tex]

We can also add inside the parentheses and multiply we'll get the same answer.

[tex] = 4(5) \\= 20[/tex]

A shop sells packs of black pens, packs of red pens and packs of green pens.
There are
2pens in each pack of black pens
5 pens in each pack of red pens
6 pens in each pack of green pens
On Monday,

number of packs
of black pens sold:
number of packs of red pens sold: number of packs of green pens sold =7:3:4
A total of 212 pens were sold.
Work out the number of green pens sold.

Answers

Answer:96 green pens

7x ,3x,4x

assume that the  black pens amd red pens  and green pens are sold respictely

7x.2+3x.5+4x.6=212

53x=212

x=4

number  of green pens sold

4x.6=4x4x6=96

6 + blank = 4 what is the blank part

Answers

Answer:

-10 also I POSTED A MATH PROBLEM PLS HELP IF U CAN!! :)

the answer is -2.

6 + ? = 4

6 + -2 = 4 is basically the same thing as saying 6 - 2 = 4 :)

solve pls brainliest

Answers

Answer:

x = 45

Step-by-step explanation:

JKL = MKL + JKM

80 = 35 + x

x = 80 - 35

x = 45

I hope I helped you^_^

00.8 is 10 times greater as

Answers

0.08 x 10 = 0.8 that’s the answer

What is the next number in the sequence? (4, 11, 25, 53, 109, ?)

Answers

Answer:

221

Step-by-step explanation:

109×2+3=221, pattern is x2+3

--

4×2+3=11

11×2+3=25

25×2+3=53

53×2+3=109

find the force needed to lift 3000n weight using a machine with a mechanical of 15

Answers

Answer:

20N

Step-by-step explanation:

Force=3000N/15

F=600/3

F=20N


10 push-ups in 2 days= ?


Answers

Answer:20

Step-by-step explanation:

Cuz 10+10=20

PLS I NEED HELP!!!! If the base of a rectangle is 9 cm and the area is 112.3 cm2, what is the height of the rectangle? Round your answer to the nearest tenth.

Answers

Answer:

12.5

Step-by-step explanation:

112.3 / 9 = 12.47777......

5. Suppose a set of math test scores is normally distributed with a mean of 100 (you do not need to know the standard deviation to answer this question, but you may find it helpful to plug in a standard deviation of your choice). If you randomly select a sample of scores from this distribution, which of the following probabilities is higher? Explain your answer.

a. The probability of the sample mean falling between 100 and 105 with a sample of 25 scores.
b. The probability of the sample mean falling between 100 and 105 with a sample of 36 scores.

Answers

Answer:

A

Step-by-step explanation:

It is more likely because there is less of a chance of an outlier. Hope this helps.

What is the value of each expression 12 x 1/8 in simplest form?

Answers

Answer:

1 1/2

Step-by-step explanation:

12 x 1/8 =

12/1 x 1/8 =

12/8 =

3/2 =

1 1/2 (1.5)

*At Step #3, 4 goes into both numbers to get 3/2. But, The simplest form is 1 1/2 (1.5)

z – yx + x; use x = 2, y=-3, and z=4

Answers

Step-by-step explanation:

z-yx+x

4-(-3•2) +2

4-(-6)+2

4+6+2

12

Answer:

12

Step-by-step explanation:

4-(-3)•2+2

4+3•2+2

4+6+2

10+2

12

Ms. Parker wants to buy 10 books. Six of them cost $12.50 each, and the rest cost $26.35
each. If she only has $150, how much more does Ms. Parker need to buy all 10 books?

Answers

Answer:

180.4

Step-by-step explanation:

6 times 12.50 is 75

and the rest is 4 and 4 times 26.35 is 105.4

Answer 105.4 + 75 = 180.4

bill and Andy were racing to see who could run the farthest in 5 minutes bill ran 5/8 of a mile and Andy ran 3/4 of a mile how much farther did andy run than bil​

Answers

Andy ran 1/8 of a mile more than bill
3/4 *2/2=6/8
6/8-5/8=1/8

Please help me as soon as possible!

Answers

Answer:

9.53 AU

Step-by-step explanation:

please help w my khan acc

Answers

Answer:

y=2x+4

Step-by-step explanation:

When X is at 0 Y is 4 so you add four at the end and then you backtrack it and get 2x+4.

Hope it helps

4325 as a product of its prime factors
​

Answers

Answer:

5*5*173=4325

Step-by-step explanation:

please mark brainiest hope it works out for you

Answer:

5²×173

Step-by-step explanation:

4325 as a product of its prime factors

5²×173

WHO ANSWERS I WILL MARK BRAINLIEST
Jarvis works in a garage for $9 an hour.
If he works on Saturday he is paid time and a half.

If he works on Sunday he is paid time and three quarters.

Last weekend Jarvis worked for FIVE hours on Saturday and TWO hours on Sunday.

Hours paid on Saturday ( Mixed fraction ) =
Hours paid on Sunday ( Mixed fraction ) =
Total hours paid ( Mixed fraction ) =

How much was Jarvis paid last weekend altogether?

Answers

$237 is how much Faze Jarvis made last weekend
jarvis was paid 237$ altogether

7. Mao counts by fives to 30. Alana counts by tens
to 40. Who will say more numbers? Explain.

Answers

Answer:

Mao will say more numbers.

Step-by-step explanation:

Think about it like this, 5x6=30 Mao will be saying 6 numbers

10x4=40... Alana will be saying 4 numbers.

What is the value of g(2)

Answers

Answer:

Its value is 9.8 m/s2

Answer:

9.8 m/s2

Step-by-step explanation:

A square with 20 meters shown as 12 centimeters, how long would a girder appear 15 meters long?

Answers

9.6 centimeters

EXPLANATION

20 meters = 12 centimeters

15 meters = x

20 meters/12 centimeters = 15 meters/x

20 meters/0,12 meters = 16 meters/x

1666.66 = 16 meters/x

x = 16 meters : 1666.66

x = 0.096 meters

x = 9.6 centimeters

#LearnWithEXO

q(x)= 1/2x - 3; q(x) =-4. Find the value of x

Answers

Answer:

[tex]q(x) =-5[/tex]

Step-by-step explanation:

I am solving this using Function Notation.

We are given:

[tex]q(x)= \frac{1}{2}x - 3[/tex]

While we are to find:

[tex]q(x) =-4[/tex]

In Function Notation, replace all the "[tex]x[/tex]" you see with the value you are given.

So, in this case,

[tex]q(x)= \frac{1}{2}x - 3\\\\=\frac{1}{2}x - 3[/tex]

Would become

[tex]q(x)= \frac{1}{2}x - 3\\\\=\frac{1}{2}(-4) - 3[/tex]

Now we can solve.

[tex]\frac{1}{2}(-4) - 3[/tex]

Use PEMDAS; Parenthesis first;

[tex]\frac{1}{2}(-\frac{4}{1})[/tex]

Cross divide: 1 cancels 1, -4 ÷ 2 = -2

Hence, we are left with

[tex](-2) - 3[/tex]

[tex]-5[/tex]

Therefore, the value of x is -5

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