1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Goshia [24]
2 years ago
14

5) The solution to 7X2 + 2X – 1 = 0 can be written as:

Mathematics
2 answers:
belka [17]2 years ago
5 0

Answer:

Step-by-step explanation:

7x² + 2x - 1 = 0

x = (-2 ±\sqrt{2^2 - 4(7)(-1)} )/ (2(7))

x = (-2 ± \sqrt{32} ) /14

x = (-2 ± 4\sqrt{2} ) /14

x = \frac{-1}{7} ± \frac{2}{7}\sqrt{2}

tia_tia [17]2 years ago
4 0

Answer:

2/7 or -30/7

Step-by-step explanation:

Use the quadratic formula

a = 7, b = 2, c = -1

-2 + or - (sqrt (2^2 - 4 * 7 * -1) / 2 * 7

-2 + or - 32/14

-2 + or -  16/7

2/7, or -30/7

You might be interested in
Evaluate 7(-4) - |-6| + |4|
Zanzabum

\red { \green {\boxed {\boxed{Answer}}}}

= 7( - 4) -  | - 6|  +  |4|

=  - 28 -  | - 6 |  +  |4|

=  - 28 - 6 +  |4|

=  - 34 +  |4|

=  - 34 + 4

=  - 30

The absolute value of a real number a is a when a≥0, or -a when a<0. The absolute value of -6 is 6. The absolute value of 4 is 4.

 ‍ 

#IfWrongPleaseReport

#StudyTogetherWithMe

#ILoveMath

7 0
3 years ago
MAX POINTS!!!! Please help me solve the problem in the picture and tell me what I’m doing also explain each step.
lapo4ka [179]

Answer: j=0.4

-j+0.8=-0.9j+0.76

-j+0.8+0.9j=-0.9+0.76+0.9j

-0.1j+0.8=0.76

-0.1+0.8-0.8=0.76-0.8

-0.1j=-0.04

-0.1j/-0.1=-0.04/-0.1

j=0.4

Ya have a good day.

5 0
2 years ago
Read 2 more answers
Hey whats 2+2? i need to know ASAP! IM IN PRESCHOOL-
Karo-lina-s [1.5K]

Answer:

lol Its 4

Step-by-step explanation:

Dont worry you got this

4 0
3 years ago
Read 2 more answers
B - 1/4 = 3 1/2 find the variable and explain how to got the answer please thanks
Art [367]

Answer:

b - 1/4 = 3 1/2

Step-by-step explanation:

b - 1/4 = 3 1/2

b - 1/4 = (3 + 1/2)

4b = 15

b = 15/

4

= 3.75

6 0
3 years ago
If I have 85 dollars and I have to split it between 7 people, what is the most I can spend on each person?
pashok25 [27]

Each person will get 12 dollars

Step-by-step explanation:

Given

Total amount = 85 dollars

Total people = 7

As it has to be divided among 7 people, the total amount will be divided by 7

So,

Each person will get:

=\frac{85}{7}\\= 12.14

Rounding off to nearest whole number

12 dollars each with 1 dollar remaining

Hence,

Each person will get 12 dollars

Keywords: Dollars, Fractions

Learn more about fractions at:

  • brainly.com/question/4522984
  • brainly.com/question/4550858

#LearnwithBrainly

4 0
3 years ago
Other questions:
  • 3.6m by 1.8 m wall How many 6 cm by 6 cm pictures could fit on the wall?
    14·2 answers
  • What is 43% of 600 gallons of water
    6·2 answers
  • Need help with this angle don't know what to do with the x
    7·1 answer
  • What is 1258 rounded to the nearest hundred?
    14·2 answers
  • A broken faucet leaks 1 gallon of water every 1 and1/3 months the amount of months that pass m varies directly with the amount o
    13·1 answer
  • Certain items are purchased jointly. If each person pays 8 coins, the surplus is 3 coins, and if each person gives 7 coins, the
    15·1 answer
  • Suppose a car is traveling at 60 km/hr, and that the positive y-axis is north and the positive x-axis is east. Resolve the car's
    10·1 answer
  • Simplify 32 ⋅ 35. (4 points)
    15·1 answer
  • A. 12/35<br> B. 35/12<br> C. 35/37<br> D. 12/37
    13·1 answer
  • If ∆ABC = ∆EDF where the coordinates of A(0,2), B(2,4), and C(2,-1), what is the measure of DF?A-3B-3.1C-5D-5.9Please respond qu
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!