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
zimovet [89]
2 years ago
7

Subtract -2x² from the sum of 4x² and 15x².​

Mathematics
2 answers:
tatuchka [14]2 years ago
8 0

Answer:

21x^{2}

Step-by-step explanation:

4x^{2} +15x^{2} --2x^{2}

4x^{2} +15x^{2} +2x^{2}...........2 negatives signs next to each make a positive

21x^{2}.................................combine like terms

harkovskaia [24]2 years ago
6 0

Answer:

Step-by-step explanation:

(4x²+15x²)-(-2x²)=19x²+2x²=21x²

You might be interested in
Any one know the answer for this question??????
Romashka [77]

Answer:

C) y > 0

Step-by-step explanation:

I graphed it

7 0
2 years ago
which graph could represent y, the amount owed on a car loan, as regular payments are made each month, x?
lianna [129]

Answer is the second graph

The more payments you pay, the less money you owe.

4 0
3 years ago
Read 2 more answers
Write an expression that can be used to check the quotient of 646 ÷ 3
Ipatiy [6.2K]
646/3=x
To check it: x*3 should =646
5 0
3 years ago
Read 2 more answers
Rewrite in simplest terms:
tangare [24]

Answer:

If one −5s−7(8s−1): -61s+7

If two −5s−7(8s−1): -112s+14

Step-by-step explanation:

-5s-7(8s-1)

Multiply -7 onto 8s and -1:

-5s-56s+7

add -5s and -56s:

-61s+7

−5s−7(8s−1)−5s−7(8s−1)

Multiply both -7 to 8s and -1

-5s-56s+7-5s-56s+7

add:

-112s+14

6 0
3 years ago
(12x + y + z = 26
mel-nik [20]

Option D. D has the matrix of constants [[12], [11], [4]].

Step-by-step explanation:

Step 1:

With the given equations, we can form matrices to represent them.

The coefficients of x, y, and z form a matrix of order 3 ×3, the variables x, y, and z form a matrix of order 1 ×3 and the constants form a matrix of order 1 ×3.

Step 2:

The linear system A is represented as

\left[\begin{array}{ccc}12&1&1\\1&-11&0\\1&-1&4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] = \left[\begin{array}{ccc}26\\17\\23\end{array}\right].

Step 3:

The linear system B is represented as

\left[\begin{array}{ccc}4&1&1\\1&-11&0\\1&-1&12\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] = \left[\begin{array}{ccc}23\\17\\26\end{array}\right].

Step 4:

The linear system C is represented as

\left[\begin{array}{ccc}1&1&1\\1&-1&0\\1&-1&1\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] = \left[\begin{array}{ccc}4\\11\\12\end{array}\right].

Step 5:

The linear system D is represented as

\left[\begin{array}{ccc}1&1&1\\1&-1&0\\1&-1&1\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] = \left[\begin{array}{ccc}12\\11\\4\end{array}\right].

Step 6:

Of the four options, the linear system D has the matrix of constants [[12], [11], [4]]. So the answer is option D. D.

4 0
2 years ago
Other questions:
  • A court reporter is transcribing a report from Canada. The report states that the suspect was driving his vehicle at a rate of 1
    7·2 answers
  • Which of the following tables represents a function?
    8·1 answer
  • Is -6.333 greater less equal to -6.375
    15·2 answers
  • What is the average rate of change over the interval (-1, 5)​
    14·1 answer
  • Which number is represented by "C" on the number line? A) 5 B) 6 C) 7 D) 8
    12·1 answer
  • DIRECTIONS: Use this information to answer Parts A and B. Scientists measure temperature in degrees Celcius and in kelvin. A tem
    9·1 answer
  • A key code must contain 2 letters and 3 numbers
    9·2 answers
  • Can someone please help me out with a small explanation thank you :)
    6·1 answer
  • Find the greatest common factor of 4w and 6c^3
    7·2 answers
  • Express (81^1/4)^3<br> in simplest radical form.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!