Solve the equation 5x^2-6x-7=0

Answers

Answer 1

Answer:

0.37

Step-by-step explanation:

5x^2-6x-7=0

25x-6x-7=0

19x-7=0

19x=7

0.37

Answer 2

Answer:

x = (3-2√11)/5 ; x= (3+2√11)/5

Step-by-step explanation:

Δ/4 = (b/2)^2 - ac  where b is the term that multiplies x, a is the therm that multiplies x^2 and c is the therm without x

Δ/4 = (-3)^2 - (-7*5) = 9 + 35 = 44 = 2^2 *11

x1 = (3 - √2^2 *11)/5 = (3-2√11)/5

x2 = (3+ √2^2 *11)/5 = (3+2√11)/5


Related Questions

A soccer player is going to kick a soccer ball from one corner of a field to the opposite corner. If the field is 80 meters long and 60 meters wide, how far will the soccer player have to kick the ball

Answers

Answer:

100 meters

Step-by-step explanation:

To figure this out, do the Pythagorean theorem

a^2 + b^2 = c^2

60^2 + 80^2 = c^2

3600 + 6400 = c^2

10000 = c^2

c = 100

Answer:

100 meters

Step-by-step explanation:

a^2 + b^2 = c^2

What is the area of a garden plot that measures 6 1/2 feet by 4 feet?​

Answers

Answer:

26 sq. ft.

Step-by-step explanation:

So 6 1/2*4

6*4=24, 1/2*4=2

24+2=26

Evaluate whether the value makes a true or false statement.
-16 < b-8, if b = -8
a. True
B) False

Answers

Answer:

False they would be equal

Step-by-step explanation:

Write each verbal expression as an algebraic expression.

6 times the difference of d and 5

help please

Answers

Answer:

6(d-5)

Step-by-step explanation:

i think this must be the equation

Write an inequality for this statement . ( you do not have to solve) Miguel is planning on going to the arcade with $17.60 in his pocket. It will cost him $8 to get there and get home by a taxi . If all games cost 25 cents . Write and solve an inequality to show the number of games he can play.

Answers

Answer:

8 + .25x < 17.60

Step-by-step explanation:

The inequality sign should be less or equal to 17.60, but I don't have that on my phone.

Determine whether the Law of Cosines or the Law of Sines is needed to solve the triangle a = 11, b = 13, c = 7

Answers

Answer:

Step-by-step explanation:

Use the Law of Cosines:

c^2 = a^2 + b^2 - 2ab*cos C becomes

7^2 = 11^2 + 13^2 - 2(11)(13)cos C.

Once you have cos C, and then side c, you can use the Law of Sines to find the other two interior angles.

Three hikers wanted to share the weight of their backpacks equally. Their backpacks weigh 31, 37, and 25 pounds. How much weight should each hiker carry?
a) 31
b) 39
c) 93
d) 30

Answers

Answer:

A

Step-by-step explanation:

Answer:

The answer is A) 31

Step-by-step explanation:

31 +37 +25 = 93

93 divided by 3 = 31

Please help I got the answer wrong-

Answers

Answer:

[tex]x {}^{2} = 150[/tex]

Step-by-step explanation:

What I did was

[tex]5 \times 5 = 25[/tex]

then I did

[tex]5 \times 5 = 25 \times 5 = 150[/tex]

and I'm hoping 150 is the answer. HOPE THIS HELPED

Consider the graphs of functions f(x) and g(x). Use the drop-down menu to complete the statement. On the interval 3≤x≤∞, function Choose... has a greater rate of growth.

Answers

Answer:

g(x) has the greater rate of growth

Step-by-step explanation:

A jewelry designed a new box for earrings. The box is to be covered in leather. How much leather will be needed?

Answers

Answer:

76.8 I believe

Please write Everything down steps and things like that

Answers

Answer:

here ya go

Step-by-step explanation:

Height is 7 inches and the diameter is 2 inches what is the radius

Answers

Answer,  1

The radius is half the diameter

The radius is 1 inch because the radius is half the diameter

A mini-golf course charges a group rate of $6 plus a fee to rent each putter. A family rents
putters and pays a total of $27.

Answers

Answer:

i think im not sure but i got 4.5

Step-by-step explanation

reasoning for my 4.5 LOL i divided 27 by 6 and i think the 4.5 is the fee maybe? im not sure there isnt much information i can go off of. but i hope this helped.

Plz help me!!! Giving brainliest if someone else answers it. I put 2 questions

Answers

Answer:

1) C

2) A

Hope it Helps!

:)

Mandy made a circular flower garden with a
diameter of 7 feet. She wants to put a fence
around the outside of the garden. About how
much fence does Mandy need to buy? (Use 3.14
for r.)
A.
11 feet
B. 22 feet
C. 38 feet
D. 44 feet

Answers

Answer:

b. 22

Step-by-step explanation:

7 x 3.14 = 21.95

( you have to buy 22 because you connot buy half of one so

you have to round up)

21.95 - 22

Find the value of x. *
(x + 15)
106
(x-10)
(2x - 35)°

Answers

Answer:

m gc

Step-by-step explanation:

What is the volume of the Cylinder ? Use 3 14 round the answer to the nearest hundredth . h = 7in r = 7in

Answers

Answer:

V = 1077.02 in³

Step-by-step explanation:

To find the volume of a cylinder, we use this formula:

V = πr²h

Let's plug in what we know.

V = (3.14)(7)²(7)

Evaluate the exponent first.

V = (3.14)(49)(7)

Multiply.

V = 1077.02 in³

Hope this helps!

PLEASE HELP!! Write the equation on the line that matches the table.

Answers

pretty sure it would be y=3x+4

A parallelogram-shaped field in a park needs sod. The parallelogram has a base of 21.5 meters and a height of 18 meters. The sod is sold in pallets of 50 square meters. How many pallets of sod are needed to fill the field?

Answers

Answer: C

Step-by-step explanation:

Answer:

the answer is 8 pallent

Step-by-step explanation:

Only answer if you are 100% sure about the answer.

Answers

Answer:

180

Step-by-step explanation:

Answer: 180ft^3

Step-by-step explanation:

Ramsay cuts out a piece from a circular cardboard for a school project. The radius of the cardboard is 10 inches and the measure of the central angle is 54 degrees, as shown.

What is the length of the curved boundary of the piece of the cardboard Ramsay cuts out?
Leave in terms of π.

Answers

Answer:

34 inches

Step-by-step explanation :

54/360 X 20

please please help me im begging you T_T

Answers

S= 25
To find the rest you just do 180-25

Answer:

s = 25

r = 155

t = 155

Step-by-step explanation:

r + 25 = 180

t + 25 = 180

s + t = 180

help me plzz please please​

Answers

Answer:

132 square feet

Step-by-step explanation:

a+b/2*h

20+24/2*6=132

PLZ help for branliest answer. I NEED CORRECT ANSWER

Answers

B

“Two angles are called supplementary when their measures add up to 180 degrees.”

The table below shows the amount of money Michelle has
in her savings account each month.
Month
0
1
2
3
Savings ($$)
50
65
80
95
Michelle deposited the same amount every week. Based on
this information, which statement about the table is true?
A.
The slope represents the total amount of money in
Michelle's savings account. The slope is $50.
B.
The slope represents the amount of money Michelle
deposited each month. The slope is $15.
C.
The slope represents the amount of money Michelle
began with in her savings account. The slope is $50.
D.
The slope represents the number of months Michelle
saved. The slope is 3

Answers

Answer: b
Explanation: every month she get $15 more added which means the slope is $15

Hello I need help with this question. Can you please explain how to got your answer?

Answers

Answer:

B) y = 4/3x - 2

Step-by-step explanation:

In pic below.

Answer:

The correct answer is B

Step-by-step explanation:

hope it will help you

Ma Lee swims for 4 weeks. Each week she swims for 6.3 hours. How many hours does Ma Lee swim in 4 weeks? *

Answers

Answer:

13.2

Step-by-step explanation:

multiply 6.3×4

she swims 6.3 hours per week for 4 weeks. to find the answer you just need to multiply then together

Answer: Ma Lee swims for (4x6.3) which equals 25.2

Step-by-step explanation:

If you write them stacked on top of each other like this

6.3

6.3

6.3

6.3

when you add up the tenths place first you get 12 so regroup the 1 over to the ones place and put 2. Next add up 6's 6x4 equals 24 but dont forget the regrouped 1. Add 24+1=25. So altogether your answer is 25.2.

What is the value of y in the equation 2(3y − 15) = 0?

Answers

Answer:

y = 5

Step-by-step explanation:

2(3y - 15) = 0

6y - 30 = 0

6y - 30 + 30 = 0 + 30

6y = 30

6y ÷ 6 = 30 ÷ 6

y = 5

PLEASE HELP!! I WILL GIVE BRAINLIEST!!

A rubber ball is dropped from 60 ft. high and bounces 5/6 as high on each bounce. What is the vertical distance it has traveled by the 4 ^ (th) bounce?

Answers

Answer:

28.9351851852

Step-by-step explanation:

PLEASE HELP MEEE ITS DUE IN 30 MINUTES!

Answers

Answer:

(suprisingly easy) 6x3x4=72 in.

Step-by-step explanation:

Answer:

look for the formular of volume

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