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
e-lub [12.9K]
2 years ago
8

The ordered pair (−3,−6) is a solution for the first equation, and it is a solution for the second equation. Therefore, (−3,−6)​

is a solution to the system of equations. ​−4x+y=65x−y=21​ true or false? HELP PLEASE I AM IN THE MIDDLE OF A QUIZ HELP!!!! ASAP
Mathematics
2 answers:
Alisiya [41]2 years ago
7 0
False. If x=-3 and y=-6 and you substitute them into the equation they do not add up

Olenka [21]2 years ago
3 0

Answer: False

I took the test. Hope you do well!!

You might be interested in
Anuja Drove 31,680 feet how many miles did Anuja Drive?
anzhelika [568]
1 foot = 0.000189 mile
31,680 feet = 6 miles
7 0
2 years ago
A rectangular bird sanctuary is being created with one side along a straight riverbank. the remaining three sides are to be encl
Mariana [72]
<span>2 km wide by 4 km long with the long side parallel to the river. So we can enclose a rectangular area using just 3 sides since the 4th side is provided free by the river. I'll use the variable L to represent the length of the side that's parallel to the river and W to represent the distance from the river that parallel side is. So the total perimeter of the fence will be 2W + L. Let's write down some equations. Area enclosed A = W * L Length of L expressed in terms of W 8 = 2W + L 8 - 2W = L Now substitute (8-2W) for L in the equation for the area. A = W * L A = W * (8-2W) A = 8W - 2W^2 Since we're looking for a maximum value, that will happen when the slope of the function is equal to 0. And the first derivative of the function tells you the slope at each point. So we need to calculate the first derivative. For simple functions such as what we have, we just need to multiply the coefficient of each term by the exponent of that term, then subtract 1 from the exponent. So let's calculate the first derivative of A = 8W - 2W^2 A = 8W - 2W^2 The term 8W has an implied exponent of 1 for W, so 8 * 1 = 8. And 1 - 1 = 0. So we have 8W^0. And since W^0 = 1, we have 8 as the 1st term of the derivative. The next term is -2W^2. So -2*2 = -4 and 2-1 = 1, giving us -4W^1. And we can get rid of the explicit exponent of 1 since that's assumed to exist giving us a term of -4W. So the first derivative becomes A' = 8 - 4W Now let's solve that equation for A' = 0. A' = 8 - 4W 0 = 8 - 4W 4W = 8 W = 2 So the ideal width of the fence is 2. And looking back at the equation 8 - 2W = L, we can calculate the length as 8 - 2*2 = 8 - 4 = 4, so the length of the fence is 4. So the dimensions of the sanctuary is 4 km parallel to the river and extended 2 km from the river for a total area of 4*2 = 8 km^2. To demonstrate that is the ideal size, let's show that if the width is either smaller or larger, then we'll have a smaller sanctuary. Let's show the smaller case. For this we'll introduce a variable called "e" which represents a very tiny, but non-zero amount of length. So we'll call the width W+e or 2+e and the length will be 8 - 2*(2+e) = 8 - 4 - 2e = 4 - 2e So the area is A = WL A = (2+e)(4-2e) A = 8 -4e + 4e - 2e^2 A = 8 - 2e^2 And as you can see, as long as e is none zero the area will be smaller than 8 km^2. Now let's try a width that's less than 2 by a tiny amount. Our width is now (2-e) and that makes our length (4+2e). So A = WL A = (2-e)(4+2e) A = 8 + 4e -4e - 2e^2 A = 8 - 2e^2 And once again, if the width is slightly smaller so the length is slightly longer, the area is once again, slightly smaller. So the absolute best side for the sanctuary is 2 km wide by 4 km long.</span>
6 0
3 years ago
If a rectangular plot measures 33 feet by 44 feet, what is
andriy [413]

Answer:

55 feet

Step-by-step explanation:

If you draw it out, the diagnonal along wiht 2 sides of the rectangle make a rigth angles traingle.

Using pythagoras theoreom, c^{2} =a^{2} +b^{2}, c is the length of the diagonal and a and b are 2 sides of rectangle.

So c=\sqrt{a^{2} +b^{2} }

=\sqrt{33^{2} +44^{2} }

put in alculator and get:

55

=55 feet

8 0
3 years ago
Critical points of x+5/x+2&gt;0
Scorpion4ik [409]

Answer:

{-5, -2}

Step-by-step explanation:

In a case like this please use parentheses to remove ambiguities.  If I were to take your "x+5/x+2" literally, I'd have to write x             plus 5/x           plus 2.

I suspect that you actually meant (x + 5) / (x + 2), and will start with that.

First of all, this function is not defined at x = -5 or at x = -2.  Thus, -5 and -2 are critical points.  

Secondly, there may be one or more critical points beyond this.  To find out, we have to differentiate (x+5)/(x+2):

           (x + 2)(1) - (x + 5)(1)

f '(x) = ------------------------------

                  (x + 2)

Here it's clear that x cannot = -2, which would cause division by zero.

Thus, our critical values are {-5, -2}.

8 0
3 years ago
Which<br> graph shows a dilation?
lukranit [14]
The second one from the top shows a dilatation.
6 0
1 year ago
Other questions:
  • How to convert Decimal to Percent?
    12·2 answers
  • A six sided fair die is rolled 4 times in a row the probability of getting a 4 only on the last trail is
    13·1 answer
  • If the area (in square units) of the region under the curve of the function f(x) = 4 on the interval [1, a] is 20 square units,
    9·2 answers
  • The average annual income, I in dollars of a lawyer with an age ox X years is modeled with the following function:
    5·1 answer
  • PLZ HELP :( <br><br>THANK YOU SOO MUCH ❤
    7·2 answers
  • What is the answer for<br> (3n + 5)(3n+6)​
    8·2 answers
  • 1/3 n=4 What does n equal?
    13·1 answer
  • 6 times the difference of d and 5
    12·2 answers
  • Please help me with this Algebra 1 question!
    7·1 answer
  • HELP ME PLEASE DUE TODAY !!! FIRST PERSON TO GIVE ME THE ANSWER I WILL GIVE YOU BRAINILYEST OR WHATEVER!!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!