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
poizon [28]
3 years ago
9

What number must be added to the expression below to complete the square? x^2-9x

Mathematics
2 answers:
Tatiana [17]3 years ago
5 0

Answer:

A.81/4

Step-by-step explanation:

To find the number that we add to complete the square, we take half of the value of b in the equation and then square it.

The value of b in this equation is -9; this makes half of it -9/2.  Squaring this,

(-9/2)² = 81/4.

pantera1 [17]3 years ago
3 0

Answer:

A.81/4

Step-by-step explanation:

x^2-9x

This is in the form x^2 + bx

To complete the square, we take b/2  then square it and add it

b =-9

b/2 = -9/2

(b/2) ^2 = (-9/2) ^2 = 81/4

You might be interested in
Fill in the blank. If necessary, use the slash mark ( / ) for a fraction bar.
kipiarov [429]

Answer:

cos Ф = adj / hyp could be either 4/5 or -4/5.

Step-by-step explanation:

If sin Ф = 3/5, then we can assume that the opposite side is 3 and the hypotenuse is 5.  Using the Pythagorean Theorem, we find that the adjacent side is 4:  

√(5² - 3²) = √16 = ±4.

cos Ф = adj / hyp could be either 4/5 or -4/5.

8 0
3 years ago
Read 2 more answers
Help me please with this question
Natalka [10]

9514 1404 393

Answer:

  c.  3 to 4

Step-by-step explanation:

There are 3 oranges and 4 apples in the bowl, so the ratio is ...

  oranges/apples = 3/4 or 3 to 4

8 0
3 years ago
Find the area of the figure.
Nady [450]

Answer:

Explanation:

So you want to start by finding the area of the big square.

We know the width to the big square is 60cm. The length to the big square is

19

+

24

+

13

=

56

Big square

A

r

e

a

=

L

⋅

W

=

56

⋅

60

=

3360

Now let’s find the little square inside the bigger square. We see from the picture that the width is 34 and the length is 24cm. Using the same formula, we can find the area of the little square.

Little square

A

r

e

a

=

L

⋅

W

=

24

⋅

34

=

816

The area enclosed is the area of the big square minus the area of the little square.

3360

−

816

=

2544

So the area enclosed is

2544

c

m

2

Step-by-step explanation:

4 0
2 years ago
What is 0.000000008 in scientific notation
Zanzabum

Answer: 8 x (10 to the power of -7)

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10

If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

6 0
3 years ago
1. What would be the best graph or display to represent your Home Library Statistics data? Why?
algol13

Answer:

A bar graph

Step-by-step explanation:

A bar chart will give you the visual understanding of your data.It will clearly show the book with most number of pages and compare the books according to the number of pages.You can formart using different colors for each bar.

4 0
3 years ago
Other questions:
  • 5 STARS!! PLEASE HELP
    7·1 answer
  • Which answer is correct?
    9·1 answer
  • Jordan spent a total of 14.85 on a trip to the zoo 2.85 on snacks and the rest on bus fares. How much did she spend on the bus f
    14·2 answers
  • Mr. Woods had $840. He spent 3/7 of his money in a lawn mower. He spent 1/8 of the remaining money on a gift for his wife. how m
    13·2 answers
  • Brainliest for correct answer please help
    15·2 answers
  • A store sells two different packages of soda as described below. (Standard 6.EE.9) Package A: 18 soda Package B: 10 soda Write a
    14·1 answer
  • What is the percent of change from 400,000 to 700,000?
    8·2 answers
  • 24. A rectangle has a length of x +5 and a width of 2x-9. Using the formula for the perimeter of a rectangle wrote an expression
    13·1 answer
  • Find the shaded area. Round your answer to the nearest tenth.
    8·1 answer
  • PLS HELP
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!