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
cricket20 [7]
4 years ago
13

What is the solution of the following quadratic inequality? x2 – 4x – 21 ≤ 0

Mathematics
2 answers:
Dominik [7]4 years ago
7 0

Answer:

3, and -7

Step-by-step explanation:

First factor the trinomial

y=x2−4x−21

.

Find 2 numbers knowing sum (-4) and product (c = - 21). They are the numbers in the factor pair (3, -7).

y = (x + 3)(x - 7)

Solving the 2 binomials, we get:

x = -3 and x = 7

trasher [3.6K]4 years ago
6 0

Answer: Its B

A number line going from negative 8 to 8. Closed circles are at negative 3 and 7. The line between the circles is shaded.

You might be interested in
Which of the following sets of numbers could be the lengths of the sides of a triangle?
kicyunya [14]

Answer is C. 8, 3, 6

To answer this, you must know the Triangle Inequality Theorem.

The two shortest sides when added together, must be greater than the longest side.

A. 2 + 4= 6 which can't work since it equals the longest side of 6

B. 4 +2=6 The sum would be less than 8, which doesn't work

C. 6 +3 = 9 the sum is greater than 8, which makes it a triangle

D. 3 +8 = 11 11 is less than 12

8 0
3 years ago
Read 2 more answers
If you have 1 Pokeball and 2 pokemon heal balls and 3 pokemon Ultra balls. How many balls are there?
rusak2 [61]

Answer:

6

is the correct answer

<h2><em><u>Hope </u></em><em><u>it </u></em><em><u>helps</u></em><em><u> you</u></em><em><u><</u></em><em><u>3</u></em></h2>
5 0
2 years ago
Jayden measured a community college and made a scale drawing. He used the scale 22 millimeters : 9 meters. The actual length of
juin [17]

Hey there! :)

Answer:

x = 242 mm.

Step-by-step explanation:

Begin by setting up a proportion between the actual college building and the drawing.

\frac{22mm}{9m} = \frac{x}{99m}

Cross multiply:

99 × 22 = 9 × x

2178 = 9x

Divide both sides by 9:

2178/9 = 9x/9

x = 242 mm.

5 0
3 years ago
What is the solution to 2x^2+8x=x^2-16?<br> x=4<br> x=22<br> x=2<br> x=4
Taya2010 [7]

Answer:

x = -4

Step-by-step explanation:

2x² + 8x = x² - 16

x² + 8x + 16 = 0

x² + 4x + 4x + 16 = 0

x(x + 4) + 4(x + 4) = 0

(x + 4)² = 0

x = -4

4 0
3 years ago
Read 2 more answers
1. ​Find the area of the triangle. Show as much work as possible for full credit.
Ugo [173]

Answer:

A = 5/12 x^2

Step-by-step explanation:

A = 1/2 bh

The base is 5/6x and the height is x

A = 1/2 (5/6x) *x

A = 5/12 x^2

5 0
3 years ago
Other questions:
  • Solve for m: 18d-2m+9k&lt;5k+10
    14·1 answer
  • The area of a rectangle is 14m^2, and the length of the rectangle is 3m less than twice the width. what are the dimensions of th
    13·1 answer
  • The count in a bacteria culture was 400 after 15 minutes and 1400 after 30 minutes. Assuming the count grows exponentially,
    7·1 answer
  • There are
    14·2 answers
  • What is the expression in factored form? <br> 6x^2+4x
    6·1 answer
  • A researcher is concerned about the impact of students working while they are enrolled in classes, and she likes to know if stud
    7·1 answer
  • # 6
    10·1 answer
  • Find the value of $c$ that makes $x^2+20x+c$ a perfect square trinomial. $c=$ Write the expression as the square of a binomial.
    12·2 answers
  • If x​=68 find the measures of angles​ 1, 2, and 3.
    6·2 answers
  • Quadrilateral HUJK has coordinates H(2, 3), 1(2, 6), J(-1, -8), and K(-2, 4). If the quadrilateral is
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!