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
Lerok [7]
3 years ago
7

Question Which of these strategies would eliminate a variable in the system of equations? 2x - y = 11 5x + 3y = -11 How many pos

sible solutions will this system have?
Mathematics
1 answer:
kenny6666 [7]3 years ago
3 0

Answer:

Elimination (multiplication and subtraction)

There is 1 solution

Step-by-step explanation:

The only way to solve this system of equations is by elimination (multiplication). Let's say that we want to cancel out the x. You multiply the first equation by 5 and you multiply the second equation by 2.

Your equations now are:

10x-5y=55 and 10x+6y=-22

You can subtract these equations to get -11y = 77.

Now that we know that y = -7, we can substitute y in to solve x.

10x-5(-7) = 55

10x=20

x=2

Final answer (2,-7)

You might be interested in
Tell me if I’m right
insens350 [35]

Answer:

yesssirrr

Step-by-step explanation:

8 0
2 years ago
Question is in the picture
ANTONII [103]

Answer:

She forgot to flip the inequality sign when dividing both sides by -4

8 0
2 years ago
Read 2 more answers
Melanie found 50 seashells on the beach, she gave Sam some of
monitta
She gave him 28 seashells
6 0
2 years ago
Find the exact value of each trigonometric function for the given angle θ.
Kay [80]

Answer:

\sin (240^\circ)=-\dfrac{\sqrt{3}}{2},\cos (240^\circ)=-\dfrac{1}{2},\tan (240^\circ)=\sqrt{3},\cot (240^\circ)=\dfrac{1}{\sqrt{3}},\sec (240^\circ)=-2,\csc (240^\circ)=\dfrac{2}{\sqrt{3}}.

Step-by-step explanation:

The given angle is 240 degrees.

We need to find the exact value of each trigonometric function for the given angle θ.

Since \theta=240, it means θ lies in 3rd quadrant. In 3d quadrant only tan and cot are positive.

\sin (240^\circ)=\sin (180^\circ+60^\circ)=-\sin (60^\circ)=-\dfrac{\sqrt{3}}{2}

\cos (240^\circ)=\cos (180^\circ+60^\circ)=-\cos (60^\circ)=-\dfrac{1}{2}

\tan (240^\circ)=\tan (180^\circ+60^\circ)=\tan (60^\circ)=\sqrt{3}

\cot (240^\circ)=\cot (180^\circ+60^\circ)=\cot (60^\circ)=\dfrac{1}{\sqrt{3}}

\sec (240^\circ)=\sec (180^\circ+60^\circ)=-\sec (60^\circ)=-2

\csc (240^\circ)=\csc (180^\circ+60^\circ)=-\csc (60^\circ)=-\dfrac{2}{\sqrt{3}}

Therefore, \sin (240^\circ)=-\dfrac{\sqrt{3}}{2},\cos (240^\circ)=-\dfrac{1}{2},\tan (240^\circ)=\sqrt{3},\cot (240^\circ)=\dfrac{1}{\sqrt{3}},\sec (240^\circ)=-2,\csc (240^\circ)=-\dfrac{2}{\sqrt{3}}.

8 0
3 years ago
Simplify.<br> Rewrite the expression in the form z^n<br> z^7/z^-14<br> =<br> 21
beks73 [17]

Step-by-step explanation:

z^7/z^-14=21

z^21=21

5 0
2 years ago
Read 2 more answers
Other questions:
  • Princess Poly found the king's stash of garden plans and sees that the area of each plot is described as a polynomial. She has n
    6·1 answer
  • Find the common difference of an Arithmetic progression of 7,11,15,19...​
    6·1 answer
  • The midpoint between points (-3, 10) and (5,0) is (x, 5). What is x?
    12·1 answer
  • -7w + 2(w + 8) = -24<br><br> Can you help me find w?
    13·1 answer
  • Match the vocabulary terms to the correct definitions.
    12·2 answers
  • 5 magazines and 3 books cost $41.50. 2 magazines and 5 books cost $42.25. Find the cost of each item.
    15·1 answer
  • A sailboat sails for 1/6 of an hour and travels 2 1/2 miles. What is it's rate in miles per hour? ​
    10·1 answer
  • Combine like terms in 5m2+16k2+13m2
    7·2 answers
  • Which ratios correctly compare bananas to apples, as shown in the picture ( 6 apples in a circle and 1 banana in the center ) ch
    12·2 answers
  • 11 points!!!!!!!! and brainliest
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!