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
Helppppppppppppppppppppp
KIM [24]

Answer:

C. 2, 1

Step-by-step explanation:

6 0
3 years ago
Which equation represents the line of best fit shown?
Dominik [7]

Answer:

b is the correct answer.

Step-by-step explanation:

Since the slope is negative, it can't be a or d. The y intercept is 810, so c can't be right. Therefore, b is right.

5 0
2 years ago
Read 2 more answers
How many real zeroes does y = ( x + 8 )^3 + 9 have?
algol13
It looks like y = x^3 only shifted to the left 8 units and up 9 units

So i think the amount of real zeroes that this equation has is :

1 Real zero

hope this helps
6 0
4 years ago
Read 2 more answers
A 6th grade math teacher can grade 15 homework assignments in 24 minutes. If he works at the same rate, how long should it take
leva [86]

Answer:

its 57.6

Step-by-step explanation:

6 0
2 years ago
if a rectangle has am area of 2x²+11x+15, what would be an expression for the length, and for the width?
lozanna [386]

Answer:

Length = 2x + 5

Width = x + 3

Step-by-step explanation:

Area of rectangle = length × width

Expression for area of the rectangle = 2x² + 11x + 15

Factorising the quadratic expression

2x² + 11x + 15 = 2x² + 6x + 5x + 15 = (2x² + 6x) + (5x + 15) = 2x(x + 3) +5(x + 3) = (2x + 5)(x + 3)

Length = 2x + 5

Width = x + 3

3 0
3 years ago
Other questions:
  • If you know f(x) equations please help
    11·1 answer
  • John checked his bank account and noticed that he had a balance of −$12.00. He immediately deposited $12.00 in his account. What
    9·2 answers
  • Solve for x<br> HELP ASAP <br> 20 points
    7·1 answer
  • Solve for c. −18c=2<br><br> −16<br><br> −4<br><br> 4<br><br> 16
    13·2 answers
  • Cassidy is going to the county fair with her friends but can only stay at the fair for 4 hours. The fair offers two different pr
    15·2 answers
  • There are 91 eighth-grade students signing up for electives.
    8·1 answer
  • What is the equation of a line that passes through points K(3, 5) and L(9, 3)?
    13·1 answer
  • Let’s say you go to the store and you want to buy cheese and you find out for 1 pound it’s $3.10 and you buy 2.3 pounds. What is
    11·1 answer
  • Pls help me in this one
    5·2 answers
  • PLEASE HELP
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!