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
AnnyKZ [126]
3 years ago
11

سا (a) From the definition of derivatives determine dy÷dx if y = -2÷x​

Mathematics
1 answer:
harina [27]3 years ago
3 0

Step-by-step explanation:

Given: y = -\dfrac{2}{x}

Derivative of a power function x^n:

\dfrac{d}{dx}(x^n) = nx^{n-1}

Therefore,

\dfrac{dy}{dx}=-2(-1)x^{-2} = \dfrac{2}{x^2}

You might be interested in
Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below
Anastaziya [24]

Answer:

Nico

Step-by-step explanation:

In order to compare who had the best performance on the aptitude test, we can use Z score. Z score indicates how many standard deviation a result  is over the mean. For this case the higher the result is, the best is the performance on the aptitude test.

Z score is expressed with the following formula:

Z=(X-μ)/σ

Where:

X is the test score

µ is the mean

σ is the standard deviation

Replacing in the formula we obtained

For Nico:

X = 88.3

µ = 66.2

σ = 13

Z=(88.3-66.2)/13=1.7

For Justin:

X = 226.2

µ = 216

σ = 17

Z=(226.2-216)/17=0.6

For Tera:

X = 7.97

µ = 7.2

σ = 0.7

Z=(7.97-7.2)/0.7=1.1

Nico had the higher Z score which means he had the better performance on the test and he should be offered the job.

3 0
3 years ago
Can someone solve this quick plz
Gwar [14]

Answer:

length = x + 5

Step-by-step explanation:

Given

area = x² + 8x + 15 and area = length × width

We require to factorise x² + 8x + 15

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are + 5 and + 3, since

5 × 3 = 15 and 5 + 3 = 8, thus

x² + 8x + 15 = (x + 5)(x + 3)

x + 3 is the width, thus x + 5 is the length

5 0
3 years ago
A principal of $2000 is placed in a savings account at 3% per annum compounded annually. How much is in the account after one ye
natita [175]

Answer:

Step-by-step explanation:

After one year

A=p(1+r/n)^nt

=2000(1+0.03/12)^12*1

=2000(1+0.0025)^12

=2000(1.0025)^12

=2000(1.0304)

=$2060.8

After two-years

A=p(1+r/n)^nt

=2060.8(1+0.03/12)^12*2

=2060.8(1+0.0025)^24

=2060.8(1.0025)^24

=2060.8(1.0618)

=$2188.157

After three years

A=p(1+r/n)^nt

=2188.157(1+0.03/12)^12*3

=2188.157(1+0.0025)^36

=2188.157(1.0025)^36

=2188.157(1.0941)

=$2394.063

8 0
3 years ago
Mr Denmark has 28 students in his class he wants to see them in seven equal rows how many students will be nitro
finlep [7]
4 people would be in each row of there were 7 rows
4 0
3 years ago
5<br> 2a<br> 22 +22+1<br> 1+<br> 22 +4a+3
lara [203]

Answer:6a+75

Step-by-step explanation:

5+2a+22+22+1+1+22+4a+3

add 22,22,1,1,22,5, and 3

2a+4a+75

6a+75

7 0
3 years ago
Other questions:
  • Does a rectangle have four congruent sides?
    6·1 answer
  • A measure of the capacity of a three-dimensional figure is called the figure’s ______
    13·1 answer
  • What is th difference in length between a 1 1/4 inch button and a 3/8 inch button
    11·1 answer
  • The quotient of two numbers is 20. Their sum is 84. What are the two numbers?
    6·1 answer
  • What is 67,456 divided by 32 and tell me how
    13·1 answer
  • A piece of fabric is 2 yards long Marcus puts one patch at each end of the fabric and at each quarter foot mark how many patches
    8·2 answers
  • The coordinates of triangle BCD are B(8.2), C(11, 13) and D(2,6). Which equality proves that triangle BCD is isosceles? (d =
    5·2 answers
  • Find three consecutive odd integers such that
    9·1 answer
  • The sum of 7 and the cube of a number as an equation
    9·2 answers
  • 2.<br> 3 in<br> x in<br> 2 in<br> If the volume of prism is 60 in³,<br> X =
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!