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
gavmur [86]
3 years ago
8

Answer any of the following:

Mathematics
1 answer:
Volgvan3 years ago
4 0
<span>1. Solve the system by substitution -2x+y=-11, 3x-4y=11. 
</span>-2x+y=-11<span>
y = 2x-11

</span><span>3x-4y=11
</span>3x-4(2x-11)=11
3x -8x + 44 = 11
-5x = -33
<span>x =33/5
y = 11/5

</span><span>2. Solve the system using elimination- 2x+6y=-12, 5x-5y=10. 
</span><span>(-2x+6y=-12)5
</span>-10x + 30y = -60

<span>(5x-5y=10)2
</span>10x - 10y = 20

Adding the two equations,
<span>-10x + 30y = -60
</span><span>10x - 10y = 20
</span>
20y = -40
y = -2
x = 0

<span>3. What is the solution of the following system?-3x-2y=-12, 9x+6y=-9. 
</span><span>-3x-2y=-12
</span>y = -3/2 x + 6

<span>9x+6y=-9
</span>y = -3/2 x - 3/2

Since the slopes are equal then they are parallel lines so they never meet at one point.

You might be interested in
What is the value of the expression 8p4
Nady [450]

ANSWER

8P_4 = 1680

EXPLANATION

We use the formula

nP_r =  \frac{n!}{(n - r)!}

For

8P_4

and n=8, r=4.

8P_4=  \frac{8!}{(8- 4)!}

This simplifies to

8P_4=  \frac{8!}{4!}

We expand the numerator using factorial notation,

8P_4=  \frac{8 \times 7 \times 6 \times 5  \times 4!}{4!}

The common factors cancel out.

8P_4=  8 \times 7 \times 6 \times 5

8P_4= 1680

3 0
3 years ago
Find the volume of the tank below.<br> A. 63 m^3<br> B. 54 m^3<br> C. 78 m^3<br> D. 96 m^3
Andrei [34K]

Answer:

V = 62.832m^3 (Approximation to the nearest thousandth)

Step-by-step explanation:

The area of a cylinder can be determined by the formula:

V = \pi r^2h    (We know that the radius, r, is 2m, and the height, h, is 5m, so we can substitute them into the formula to calculate the volume of this cylindrical tank)

V = \pi * 2^2 * 5    (Simplify)

V = 20\pi

V = 62.832m^3 (Approximation to the nearest thousandth)

4 0
3 years ago
Robin has a piece of ribbon that is 4.5 meters long. She wants to cut it into pieces that are .05 meters long. How many pieces o
Nana76 [90]
Answer: 9 pieces of ribbon

Explanation: 4.5 / 0.5 = 9
6 0
2 years ago
Read 2 more answers
Tonisha has a lemonade stand. She has 34$ in expenses and wants to make at least 80$per day.
lukranit [14]

Answer:

is there anything else to the question?

Step-by-step explanation:

8 0
3 years ago
How do i work this problem out
evablogger [386]
7/10 times 3/6 is 21/60 just multiply a cross
7 0
3 years ago
Other questions:
  • Ms. Nina wants to buy candy mix for $1.00 per pound. If she already bought 50 pounds of candy for $1.20 per pound, how much cand
    15·1 answer
  • Franklin deposits $3500 in an account that earns 3.5% interest compounded annually. Which function equation represents the balan
    6·2 answers
  • Sam is a waiter at a local restaurant where he earns wages of $5 per hour Sam figures that he also earns about $3 in tips for ea
    11·2 answers
  • a group consisted of 2 girls for every boy. 24 girls joined the group. there are now 5 girls for every boy. how many boys are in
    7·2 answers
  • Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7).
    5·2 answers
  • 283,980 in word form
    14·1 answer
  • When the variable is on both sides of the equation, it must be isolated on one side, and it doesn't matter which
    13·1 answer
  • Which day and time represents the best predicted time during this week to explore the tide pools in Point Loma?
    7·2 answers
  • Which expression is equivalent to squareroot 36/25
    13·1 answer
  • What is the defining property of a function
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!