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
Anvisha [2.4K]
3 years ago
6

*Brainliest* I need help with 4 problems like this...KHAN ACADEMY.

Mathematics
1 answer:
Sedaia [141]3 years ago
5 0

9514 1404 393

Answer:

  1. (x +1)² = 4
  2. (D)  x = -1 ±2

Step-by-step explanation:

Start by getting the x-terms on one side of the equal sign. We can do that by subtracting x from both sides.

  3 = x² +2x

Now, add the square of half the x-coefficient.

  3 +1 = x² +2x +1

  (x +1)² = 4 . . . . . . . . write as a square in the desired form

__

To solve, take the square root, and add the opposite of the left-side constant.

  x +1 = ±2

  x = -1 ±2 . . . . . . matches choice (D)

You might be interested in
Which best explains whether or not all isosceles triangles are similar?
Natali5045456 [20]

Answer:

C: All isosceles triangles are not similar. The pair of congruent angles within one triangle is not necessarily congruent to the pair of congruent angles within the other triangle.

Step-by-step explanation:

An Isosceles triangle is one that 2 of it's sides are equal and thus two of its angles are congruent which means they are equal.

Now, another Isosceles triangle may not necessarily be similar to another one because the congruent angles in one Isosceles triangle may not be the same with that of another Isosceles triangle.

Thus, correct answer is option C

5 0
3 years ago
Dont steal points please if you do you will get repo answer all please I will give brainliest if its correct and 5 stars rating
WINSTONCH [101]

Answer:

Here is the work I did yesterday for you

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
How do you do this?Can you help me with the steps? I don't really get this a lot
polet [3.4K]
Before you do the steps, change the fractions given to improper fractions:
2 2/3 = 8/3
3 1/6 = 19/6

Now, I think the first step they want you to write is:
8/3 (divided by) 19/6

When you divide two fractions, it's the same as multiplying the first fraction by the reciprocal of the second fraction. (A reciprocal is a fancy way of saying you flip the fraction)
So the next step will look like this:
8/3 x 6/19

With this setup, you can cross simplify the fractions so that they look like this:
8/1 x 2/19
When you multiply this, you get 16/19
Let me know if you have any questions!
4 0
3 years ago
Read 2 more answers
Which proportion could be used to find the length of side b?​
Goshia [24]

Answer:

B

Step-by-step explanation:

Using the Sine Rule in ΔABC

\frac{a}{sinA} = \frac{b}{sinB} = \frac{c}{sinC}

∠C = 180° - (82 + 58)° = 180° - 140° = 40°

Completing values in the above formula gives

\frac{a}{sin58} = \frac{b}{sin82} = \frac{8.4}{sin40}

We require a pair of ratios which contain b and 3 known quantities, that is

\frac{b}{sin82} = \frac{8.4}{sin40}

OR

\frac{sin40}{8.4} = \frac{sin82}{b} → B

8 0
3 years ago
Read 2 more answers
What is 23.4 x 0.4 equals
Hunter-Best [27]
9.36 is what it equals
5 0
3 years ago
Read 2 more answers
Other questions:
  • On one day, the stock of Seraj Food Technologies went up by $30\%.$ The next day, the stock fell by $30\%.$ Over the two days, t
    10·1 answer
  • Someone help me plz!!!!
    11·2 answers
  • Help please! detailed would be great!
    6·1 answer
  • A company that manufactures toothpaste is studying five different package designs. Assuming that one design is just as likely to
    10·1 answer
  • What is the square root of 32?
    9·2 answers
  • Is 16 tons greater then less then or equal to 32000 ib​
    10·1 answer
  • A satellite weighs 150 pounds on Earth. Using
    15·1 answer
  • Question 2 of 10
    8·1 answer
  • What is the simplest form of this expression?<br> 2y^2(-6y + 3) + 4y^3
    12·2 answers
  • a box with a square base has length plus girth of 108 in. What is the length of the box if its volume is 2200 in^3?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!