Mathematics College

-7r2 + 7r + 2 = 2
Find Discriminant

Answers

Answer 1

Answer:

r = 1 , 0

Step-by-step explanation:

-7[tex]r^{2}[/tex] + 7r + 2 = 2

-7r(r-1)=2-2

-7r(r-1)=0

r-1=0

r=1

Answer 2
I think r=0 I think that’s the answer

Related Questions

A building is 52 meters tall. The building next to it is 50.36 meters tall. What is the difference between the heights of the buildings?

Answers

Answer:

1.64 meters

Step-by-step explanation:

Subtract 52 - 50.36 to find the difference between the heights. You get 1.64 meters.

Hope it helps!

a real estate agent sells a house for $360,000. the amount was 30% of her sales for the entire week. which equation could be used to determined s, the total amount of sales for the week​

Answers

Answer:

1 200 000 $

Step-by-step explanation:

(100 divide per 30 ) x 360 000 $

Dang he beat me here sorry for not getting to answer

What expression is equivalent to (-18) - 64n ?

A -2 (9 - 32n)
B 2 (9 - 32n)
C 2 (9 + 32n)
D -2 (9 + 32n)

Answers

Answer:

D

Step-by-step explanation:

Distribute the -2 to the 9 to get -18 and then to the 32n giving you -64n

what would be yearly earnings for a person with $6000 in savings at an annual interest rate of 2.0%

Answers

The yearly earnings would be $150

How have you seen racism, protest, conflict, dehumanization play out in our current world?

paragraph plz

Answers

Answer:

i have seen a lot of racist people. let me tell you something that happened the other day when i was on here i found this kid posting racist things and calling blacks ugly. and he then started being mean to my friends and every year we celebrate black history month for rights rights and this is a good thing to do cause we all matter.#black lives matter

Step-by-step explanation:

Four times the difference of a number cubed and six

Answers

Step-by-step explanation:

4(n^3 - 6)

hope this helps

Evaluate the expression when a=−15 and b=−5.

Answers

Answer:

-3/5

Step-by-step explanation:

(b + 14)/a = ((-5) + 14)/(-15) = -9/15 =-3/5


5
7
−
2
+
7

=
1
1
1

Answers

Answer:

Step-by-step explanation:

57-2=55

55+7=62

it does not equal 111

A collector has 2792 coins
altogether. Half of the coins
are on display. The collector
buys more coins at an auction
so that the coins on display
are now 40% of the collection.
How many coins are bought at
the auction?

Answers

Answer:

3490 coins

Step-by-step explanation:

Given data

Total coins= 2792 coins

Half of the coins are on display

that is 50% are on display

=2792/2

=1396

let the coins bought be x

40% of x= 1396

40/100*x= 1396

0.4x= 1396

x=  1396/0.4

x=3490

Hence 3490 coins were bought

P(AB)fxufucufgcidgfyzyfgx​

Answers

Answer:

????????????????xhrhrhdhehdhzh

Answer:

??????????????????????????????????????????????????????????????????????????///////

Step-by-step explanation:

PLEASE HELPP! WORTH 21 POINTS AND I WILL MARK BRAINLIEST!!!

Answers

Answer:

8 pizz an chick 6

Step-by-step explanation:

Wait are you from corpus

How do you solve the following word problem

A small radio transmitter broadcasts in a 49 mile radius. If you drive along a straight line from a city 67 miles north of the transmitter to a second city 63 miles east of the transmitter, during how much of the drive will you pick up a signal from the transmitter?


I must give the answer in miles and am unclear as to what equations to use and need details on what equations to use to get to the correct answer.

thanks for any help.

M

Answers

Answer:

Step-by-step explanation:

Let the transmitter be located at (0,0)

The equation for its effective coverage area will be a circle centered at  (0,0)  with a radius of 49.

So....the equation is  

[tex]x^2 + y^2 = 49^2[/tex]

[tex]x^2 + y^2 = 2401[/tex]

Let the point 67 miles north of the transmitter be (0, 67)

Let the point 63  miles east of the transmitter be (63, 0)

The line connecting these (the line of travel)  will have a slope of

[67 - 0] / [ 0 - 63]  =  -67/63

The equation of this line will be: y  = (-67/63)x  + 67

The signal will be received between the points:

(21.681, 43.942)  and (45.192, 18.938)

The distance between these points  is

[tex]\sqrt{[ ( 45.192 - 21.681)^2 + ( 43.942 - 18.938)^2 ] } = 34.322 miles[/tex]    (1)

The distance  between (0, 63) and (67, 0)

[tex]\sqrt{[ ( 63)^2 + ( 67)^2 ] }=91.97miles[/tex] (2)

So....you will receive the signal using  (1)/ (2)    

(34.322 / 91.97) x 100  ≈  37%  of the drive

let x represent one number and let y represent the other number. use the given conditions to write a system of equations. solve the system and find the numbers. three times a first number decreased by a second number is 22. the first number increased by twice the second number is 12.

Answers

9514 1404 393

Answer:

  (x, y) = (8, 2)

Step-by-step explanation:

The relevant equations are ...

  3x -y = 22

  x +2y = 12

__

We can eliminate y by adding twice the first equation to the second.

  2(3x -y) +(x +2y) = 2(22) +(12)

  7x = 56

  x = 8

Substituting into the first equation gives ...

  3(8) -y = 22

  y = 24 -22 = 2

The first number is 8; the second number is 2.

Please help me with this question I am really confused

Answers

Step-by-step explanation:

The answer is consistent

If f(1) = 2 and f(n+1) = f(n)^2 – 3 then find the value of f(3).

Answers

Answer:

The value of f(3) = -2.

Step-by-step explanation:

First of all, let's find f(2).

[tex]f(n+1)=f(n)^{2}-3[/tex]

[tex]f(1+1)=f(1)^{2}-3[/tex]

[tex]f(2)=f(1)^{2}-3=2^{2}-3=1[/tex]

Now, we can find f(3):

[tex]f(2+1)=f(2)^{2}-3[/tex]

[tex]f(3)=f(2)^{2}-3=1^{2}-3=-2[/tex]

Therefore, the value of f(3) = -2.

I hope it helps you!

PLEASE ANSWER ASASP FOR BRAINLEST!!!!!!!!!!!!!!

Answers

Answer:

48 units squared

Step-by-step explanation:

HELP!!!!!!!!!!!!!!!!

Answers

Answer:

c

Step-by-step explanation:

;)

Which expresses a ratio in fraction form?
4:7
4 to 7
4/7
714

Answers

Answer:

I think it is 4/7 I might be wrong

I’m pretty sure it might be 4:7
But I’m not positive that’s the answer

A rectangular has an area of 12 ft.² and a length of 5 feet what is the width

Answers

Answer:

12/5

Step-by-step explanation:

Width times Length = the area

w*5 = 12

w = 12/5

Answer:

w=2.4ft

Step-by-step explanation:

Use the calculator to find the value of x for the equation: × + 3.2=6.3​

Answers

Answer:

x = 3.1

Step-by-step explanation:

Subtract 6.3 - 3.2 to find the value of x. You get 3.1.

Hope it helps!

14. What is the value of the missing angle? (1 point)
151
х
75
75-
115
135
O 129°
O 1530
O 1690
0720°

Answers

Answer:

75+ po e photo math nyo po sa play store I download nyo po

Step-by-step explanation:

sana po makatulong po

Pls help ASAP I’ll brainlest

Answers

Answer:

x=-0.26

Step-by-step explanation:

x=0.4

-7.5x+0.59=-2.41
add 0.59 to both sides
-7.5x=-3
divide by -7.5 on both sides
x=0.4

Find the measure of angle4

A.113
B. 33.5
C.67

Answers

Answer:

B

Step-by-step explanation:

Took it

Anand knows from experience that if he does not review a new vocabulary word that he has learned, that
he has a 70% chance of forgetting it each day. Let D be the number of days Anand goes without reviewing
a word until he forgets it.
Find the probability that it takes Anand 4 or more days to forget the word.
You may round your answer to the nearest hundredth.
P(D > 4) =

Answers

Answer:

0.031

Step-by-step explanation:

1-0.973 = 0.027 ≈ 0.03

when graphing what does "b" stand for in y-intercept
a. base
b. begin
c. binomial
d. bound

Answers

Answer:

A. base

Step-by-step explanation:

if this helped please press the pink "thanks" button

Which value or values for the variable c from the set below will make 2 + 0.5c < 2c true
{0.2, 0.7, 1, 3}
A) Only 3
B) 1 and 3
C) 0.7, 1, and 3
D) All the values in the set

Answers

B should be the answer but I’m not that sure

Pls help I’ll brainlest ASAP pls

Answers

Answer:

k=63

Step-by-step explanation:

(k/3)+3=24

---> (k/3)=21

- this is because we subtracted 3 from each side

---> k=63

- this is because we multiplied each side by 3

i hope this helped :D

Answer:

k=63

Step-by-step explanation:

i jus checked

Please could answer this question for me

Answers

Answer:

a) 26.2cm

b) 13.8 cm

please mark brainliest

Step-by-step explanation:

a) perimeter = 2(9+4.1) = 2(13.1) = 26.2 cm

b) perimeter = 3.6+3+7.2 =13.8 cm

You estimate that there will be 85 people at your party, but only 75 show up, what is the percent error of your estimate?

Answers

Answer:

Percentage error of your estimate = 13%    

Step-by-step explanation:

Given

Approximate value = 85

Exact value = 75

To determine

Percentage error can be determined using the formula

Percentage Error =  |Approximate Value − Exact Value| / |Exact Value| × 100%

                             = |85 − 75| / |75| × 100%

                             = 10 / 75 × 100%

                             = 0.1333 × 100%

                             = 13%

Therefore, percentage error of your estimate = 13%                                    

Answer:

i got Observed Value as 10 and True Value as 11. someone tell me if i was wrong

(-6, -2) (4, -5) what is the distance in units, between the two points

Answers

answer: √109 ≈ 10.44
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