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
Darina [25.2K]
3 years ago
15

What is the reciprocal of -2/7

Mathematics
2 answers:
dezoksy [38]3 years ago
4 0

Just flip it to find recipricol to be

-7/2

Charra [1.4K]3 years ago
3 0

the reciprocal of -2/7 is 7/-2

You might be interested in
-2x+15y=-24<br> 2x+9y=24 <br> solve the system of equation
zhuklara [117]

Answer:

x = 12, y = 0

Step-by-step explanation:

Use elimination.

24y = 0

y = 0

Then plug back into the second equation.

2x + 9(0) = 24

2x = 24

x = 12

Plug back into the first equation to check.

8 0
3 years ago
Which ones make rectangles?
Zarrin [17]

Answer:

b.

Step-by-step explanation:

To figure this out, you just need to fold those nets in your head and see if the edges line up and it forms the figure you want it to. From what I can tell, net b is the only one that would form a rectangular prism.

3 0
2 years ago
Read 2 more answers
A grocery store sells a bag of 7 oranges for $2.80. What is the unit cost?
Elanso [62]

Answer:

The quadratic equations and their solutions are;

9 ± √33 /4 = 2x² - 9x + 6.

4 ± √6 /2 = 2x² - 8x + 5.

9 ± √89 /4 = 2x² - 9x - 1.

4 ± √22 /2 = 2x² - 8x - 3.

Explanation:

Any quadratic equation of the form, ax² + bx + c = 0 can be solved using the formula x = -b ± √b² - 4ac / 2a. Here a, b, and c are the coefficients of the x², x, and the numeric term respectively.

We have to solve all of the five equations to be able to match the equations with their solutions.

2x² - 8x + 5, here a = 2, b = -8, c = 5.                                                  x = -b ± √b² - 4ac / 2a = -(-8) ± √(-8)² - 4(2)(5) / 2(2) = 8 ± √64 - 40/4.     24 can also be written as 4 × 6 and √4 = 2. So                                                                                     x = 8 ± 2√6 / 2×2= 4±√6/2.

2x² - 10x + 3, here a = 2, b = -10, c = 3.                                                   x =-b ± √b² - 4ac / 2a =-(-10) ± √(-10)² - 4(2)(3) / 2(4) = 10 ± √100 + 24/4. 124 can also be written as 4 × 31 and √4 = 2. So                                                                              x = 10 ± 2√31 / 2×2 = 5 ± √31 /2.

2x² - 8x - 3, here a = 2, b = -8, c = -3.                                                    x = -b ± √b² - 4ac / 2a = -(-8) ± √(-8)² - 4(2)(-3) / 2(2) = 8 ± √64 + 24/4.     88 can also be written as 4 × 22 and √4 = 2. So                                                                             x = 8 ± 2√22 / 2×2 = 4± √22/2.

2x² - 9x - 1, here a = 2, b = -9, c = -1.                                                     x = -b ± √b² - 4ac / 2a = -(-9) ± √(-9)² - 4(2)(-1) / 2(2) = 9 ± √81 + 8/4.                                          x = 9 ± √89 / 4.

2x² - 9x + 6, here a = 2, b = -9, c = 6.                                                    x = -b ± √b² - 4ac / 2a = -(-9) ± √(-9)² - 4(2)(6) / 2(2) = 9 ± √81 - 48/4.                                                                             x = 9 ± √33 / 4 .

mark me as brilinist please

6 0
3 years ago
Read 2 more answers
My cupcake recipe makes 12 cupcakes and requires 1 1/2 sticks of butter. I can only buy whole sticks of butter. How many whole s
EleoNora [17]

Answer:

13 sticks of butter

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
Perform the operation. Enter your answer in scientific notation.<br><br><br> 3.2 × 107 + 7.2 × 108 =
almond37 [142]

Answer:

1, 120

Step-by-step explanation:

    3.2 x 107 = 342.4

                                               

+   7.2 x 108 = 777.6

_____________________

                       1, 120                          

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following equations could be used to solve the problem?
    15·1 answer
  • What is the radical form of each of the given expressions? 4 1/7 AND 4 7/2 AND 7 1/4 AND 7 1/2 I WILL UPVOTE
    11·1 answer
  • a bird that was perched atop 15 and a half door tree dives down six feet to a branch below. how far above the ground is the bird
    13·1 answer
  • What is the area of rectangle ABCD
    7·1 answer
  • Rule: y=x+3<br><br> HELPpppppp
    11·2 answers
  • Please help.....25 points!!!
    14·2 answers
  • The measures of the angles 7x+17 and 3x-20
    9·2 answers
  • For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of 21 N acts on
    6·1 answer
  • 0.175 as a percentage
    6·2 answers
  • 3x∧2±6x±x±20 sole by factorization
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!