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
77julia77 [94]
2 years ago
6

The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?

Mathematics
2 answers:
Karolina [17]2 years ago
5 0

Answer:

x^2 + x = 42

Step-by-step explanation:

Let x = the number

Is means equals and sum means add

The sum of a number and its square is 42

x + x^2 = 42

maks197457 [2]2 years ago
5 0

Answer:

ITS A!!! x^2 + x = 42

Step-by-step explanation:

You might be interested in
A student bought some pens at 8 each and some pencils at 31.50 each. If the total
Wittaler [7]

Step-by-step explanation:

Letthenumberofpensbexand

numberofpencilsbey

then

x+y=16ory=16−x

andtheirvalue

8x+1.5y=50

8x+(

2

3

)(16−x)=50

8x+24−(

2

3

)x=50

8x−(

2

3

)x=50−24

(

2

13x

)=26∴x=4

theny=16−x=16−4=12

5 0
2 years ago
PLZ HELP!!!!!!!!!!!!!
rewona [7]
4th from the top:  1/2base x height
5 0
2 years ago
Read 2 more answers
A road perpendicular to a highway leads to a farmhouse located d miles away. An automobile traveling on this highway passes thro
pshichka [43]

Answer:

\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+900}}

Step-by-step explanation:

A road is perpendicular to a highway leading to a farmhouse d miles away.

An automobile passes through the point of intersection with a constant speed \frac{dx}{dt} = r mph

Let x be the distance of automobile from the point of intersection and distance between the automobile and farmhouse is 'h' miles.

Then by Pythagoras theorem,

h² = d² + x²

By taking derivative on both the sides of the equation,

(2h)\frac{dh}{dt}=(2x)\frac{dx}{dt}

(h)\frac{dh}{dt}=(x)\frac{dx}{dt}

(h)\frac{dh}{dt}=rx

\frac{dh}{dt}=\frac{rx}{h}

When automobile is 30 miles past the intersection,

For x = 30

\frac{dh}{dt}=\frac{30r}{h}

Since h=\sqrt{d^{2}+(30)^{2}}

Therefore,

\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+(30)^{2}}}

\frac{dh}{dt}=\frac{30r}{\sqrt{d^{2}+900}}

3 0
3 years ago
If f'(0) = 5 and F(x) = f(3x), what is F'(0)?
Llana [10]

Answer:

\displaystyle F'(0) = 15

Step-by-step explanation:

We are given that:

f'(0) = 5 \text{ and } F(x) = f(3x)

And we want to find F'(0).

First, find F(x):

\displaystyle F'(x) = \frac{d}{dx}\left[ f(3x)]

From the chain rule:

\displaystyle \begin{aligned} F'(x) &= f'(3x) \cdot \frac{d}{dx} \left[ 3x\right] \\ \\ &= 3f'(3x)\end{aligned}

Then:

\displaystyle \begin{aligned} F'(0) & = 3f'(3(0)) \\ \\ & = 3f'(0) \\ \\ & = 3(5) \\ \\ & = 15\end{aligned}

In conclusion, F'(0) = 15.

7 0
2 years ago
Read 2 more answers
The formula to find the period of orbit of a satellite around a planet is T2=(4π2GM)r3 where r is the orbit’s mean radius, M is
tatyana61 [14]
I know what is the answer to this problem, I believe, if you cannot do it on your own check out www.answers.yahoo.com or private message me so I can explain
7 0
3 years ago
Other questions:
  • PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT
    13·2 answers
  • Driving from oban to stranraer a driver averages 8 miles per gallon of fuel. if fuel costs 83 cents a gallon how much will be th
    11·2 answers
  • kelly wants to enclose a rectangular area for her dog with 240 feet of fencing.she wants the width to be 20 feet. what will be t
    6·1 answer
  • Which expression gives the y-intercept of the line when the equation is in standard form?
    6·1 answer
  • ‍♀️always have problems with these
    11·2 answers
  • Zadanie 2c matematyka z plusem kl 8, (Oblicz długość boku rombu o przekątnych długości 10 i 6).
    6·2 answers
  • Solve in order of operation<br> Thanks
    10·2 answers
  • Dante's parents gave him a fish tank containing 20 goldfish. Each month, Dante gives away 2 goldfish from his fish tank to
    14·1 answer
  • Using the graph of f(x) and g(x), where g(x) = f(k⋅x), determine the value of k.
    9·1 answer
  • Find the y-intercept of the line 11x - 8y = -1.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!