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
Strike441 [17]
3 years ago
9

A) the quadratic x^2-4x-21 can be written in the form (x+a)^2+b find the values of and and b

Mathematics
1 answer:
MakcuM [25]3 years ago
3 0
Part a. A=-2. B=-25
Part b solutions; x=7 x=-3

You might be interested in
Solve for x 6 (8X minus 1) equals 9 (x + 2)
Oxana [17]

Answer:

x = \frac{8}{13}

Step-by-step explanation:

Given

6(8x - 1) = 9(x + 2) ← distribute parenthesis on both sides

48x - 6 = 9x + 18 ( subtract 9x from both sides )

39x - 6 = 18 ( add 6 to both sides )

39x = 24 ( divide both sides by 39 )

x = \frac{24}{39} = \frac{8}{13}

8 0
3 years ago
If a dice is rolled 18 times, how many times is the number 2 expected to come up? *
mart [117]

Answer:

the answer is B. 3 times

that's what I think

8 0
3 years ago
Find the length of side x in simplest radical form with a rational denominator
Yakvenalex [24]

Answer:

x = √(10)/2

Step-by-step explanation:

Here, we want to get the measure of the side marked x

what we have is an isosceles right triangle since the two acute angles of the right triangle are 45 degrees each

Hence, the other last side will measure x too

Mathematically, according to Pythagoras’; the square of the hypotenuse equals the sum of the squares of the two other sides

Thus;

x^2 + x^2 = (√5)^2

2x^2 = 5

x^2 = 5/2

x = √(5/2)

x = √5/√2

Rationalizing the denominator;

x = (√2 * √5)/(√2 * √2)

x = √10/2

4 0
3 years ago
Are 2/7 and 6/21 equivalent ratios
ra1l [238]
6 / 2 = 3
21 / 7 = 3

Yes, 2/7 and 6/21 are equivalent ratios.  The second number is simply the first number tripled.  
5 0
3 years ago
Read 2 more answers
If 3 inches equals 20 miles on map,<br> how<br> many inches is 72 miles?
Vsevolod [243]

Answer:

10.8 inches

Step-by-step explanation:

72/20=3.6

3.6*3=10.8

5 0
3 years ago
Other questions:
  • Place the following in increasing order:  3/5  70%   0.8  11/20  65%   0.09. How would you explain your process to someone else?
    10·1 answer
  • Can someone please simplify this for me?<br> 63 ÷ 3 2 + |2|
    9·2 answers
  • Csc theta = -8/5<br> what is theta in radians?
    12·1 answer
  • List the first twenty counting numbers in the indicated base below. twelve (Only digits 0, 1, 2, 9, A, B are used in base twelve
    8·1 answer
  • Lisa watches the vehicles that passes buy in front of he apartment building.she has counted 15 vans and 30 cars. what is the app
    6·1 answer
  • What’s the answer to the function
    12·1 answer
  • Thomas buys a case of bottled water. A case contains 36 bottles of water and it costs $4.68. How much does each water bottle cos
    5·1 answer
  • I rly need help with this..plz helpp
    7·2 answers
  • Question is in the picture:
    5·2 answers
  • How to graph <br>y=-3x +4<br><br>​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!