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
RoseWind [281]
3 years ago
12

Part A: Explain why x = 5 makes 4x - 1 5 19 true but not 4x - 1 < 19.

Mathematics
1 answer:
Westkost [7]3 years ago
6 0

9514 1404 393

Answer:

  • 19 ≤ 19 . . . true
  • 19 < 19 . . . false
  • x = 9

Step-by-step explanation:

A) A number cannot be less than itself, but can be equal to itself.

In each case, the left side of the inequality evaluates to 19:

  4(5) -1 = 20 -1 = 19

It is true that 19 is less than or equal to 19. This is true because 19 = 19.

It is not true that 19 is less than 19. A number cannot be less than itself.

__

B) 5x +2 = 47

  5x = 45 . . . . . . subtract 2 from both sides

  x = 9 . . . . . . . . . divide both sides by 5

The element 9 from the set is the solution to the equation.

You might be interested in
Which ordered pairs are solutions to the inequality 2y-x≤-6 ?
Ray Of Light [21]

Answer:

C

Step-by-step explanation:

3 0
3 years ago
The first derivative of x^2+2y^2=16 is -x/(2y), the second is -(2y^2+x^2)/(4y^3). Find the third implicit derivative of x^2+2y^2
gtnhenbr [62]

Answer:

d³y/dx³ = (-2xy² − 3x³ − 4xy²) / (8y⁵)

Step-by-step explanation:

d²y/dx² = (-2y² − x²) / (4y³)

Take the derivative (use quotient rule and chain rule):

d³y/dx³ = [ (4y³) (-4y dy/dx − 2x) − (-2y² − x²) (12y² dy/dx) ] / (4y³)²

d³y/dx³ = [ (-16y⁴ dy/dx − 8xy³ − (-24y⁴ dy/dx − 12x²y² dy/dx) ] / (16y⁶)

d³y/dx³ = (-16y⁴ dy/dx − 8xy³ + 24y⁴ dy/dx + 12x²y² dy/dx) / (16y⁶)

d³y/dx³ = ((8y⁴ + 12x²y²) dy/dx − 8xy³) / (16y⁶)

d³y/dx³ = ((2y² + 3x²) dy/dx − 2xy) / (4y⁴)

Substitute:

d³y/dx³ = ((2y² + 3x²) (-x / (2y)) − 2xy) / (4y⁴)

d³y/dx³ = ((2y² + 3x²) (-x) − 4xy²) / (8y⁵)

d³y/dx³ = (-2xy² − 3x³ − 4xy²) / (8y⁵)

8 0
3 years ago
Read 2 more answers
Jamal(j) and Mackenzie (m) are brother &amp; sister. Jamal(j) is 4 years older than Mackenzie(m). If Jamal (j)is 16 years old, w
KatRina [158]

Answer:

20

Step-by-step explanation: easy j is 16 years old and m is 4 years older so m is 20

8 0
3 years ago
Helen plays basketball. For free throws, she makes the shot 78% of the time. Helen must now attempt two free throws. C = the eve
riadik2000 [5.3K]

Answer:

0.6708 or 67.08%

Step-by-step explanation:

Helen can only make both free throws if she makes the first. The probability that she makes the first free throw is P(C) = 0.78, now given that she has already made the first one, the probability that she makes the second is P(D|C) = 0.86. Therefore, the probability of Helen making both free throws is:

P(C+D) =  P(C) *P(D|C) = 0.78*0.86\\P(C+D) = 0.6708

There is a 0.6708 probability that Helen makes both free throws.

5 0
3 years ago
Graph the Image of square KLMN after a translation 3 units left .​
AURORKA [14]

Answer:

N' (-8,9) K' (-8,3) L' (-2,3) M' (-2,9)

Step-by-step explanation:

To translate the square 3 units to the left you would subtract 3 from the x-coordinates of the points shown.

3 0
2 years ago
Other questions:
  • Describe how to decide if 94 is a prime number or a composite number
    6·2 answers
  • The area of the rectangle is 20 square inches. The rectangle is enlarged by a factor of 6.
    9·2 answers
  • What is the slope of the line that passes through the points -2, 2, and -4, 2​
    15·2 answers
  • Wastewater is filling barrels at the rate of 13 quarts per hour. The recycling facility picks up 96 full barrels on each trip, a
    14·2 answers
  • Solve the inequality. 6 &gt;= -3/2d
    5·1 answer
  • If the sum of five consecutive even integers is 90, what is the smallest of the five integers?
    15·1 answer
  • A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.
    14·1 answer
  • The sum of three consecutive even integers is 276. Find the integers. Please help and leave explanation if possible
    7·2 answers
  • HELP ME PLEASE i beg u
    13·2 answers
  • What was the median number of posts made?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!