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
7- Simplify each expression.<br> -8+2(-5)
postnew [5]

Answer:

-18

Remember PEMDAS.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Please explain how to do and set up
In-s [12.5K]

A

using the Cosine rule in ΔSTU

let t = SU, s = TU and u = ST, then

t² = u² + s² - (2us cos T )

substitute the appropriate values into the formula

t² = 5² + 9² - (2 × 5 × 9 × cos68° )

   = 25 + 81 - 90cos68°

   = 106 - 33.71 = 72.29

⇒ t = \sqrt{72.29} ≈ 8.5 in → A


6 0
3 years ago
Is 3.5 &gt; or &lt; or equal to 1/2
Sloan [31]
Simple, we know > sign is greater than sign and < sign means less than sign. We divide 1/2 and that gets us 0.5. 3.5 is greater than 1/2 so the answer would be 3.5>1/2
5 0
3 years ago
Read 2 more answers
Give s reason to divide 15 into 3 equal groups
liubo4ka [24]
Divide the cookies to each friend. each friend gets 5 cookies
7 0
3 years ago
Tripp and Rico are two dogs. Tripp weighs exactly 35 pounds more than Rico. Together, they weigh exactly 49 pounds. How much doe
babymother [125]
Call the weights of the two dogs t and r.

We know that Tripp weights 35lbs more than Rico, or:
t=r+35

We also know that the total weight of both dogs is 49lbs.:
t+r=49

Now, by substitution:
(r+35)+r=49
2r+35=49
2r+35-35=49-35
2r=14
r=\frac{14}{2}
r=7
Rico weighs 7lbs.

Then:
t=r+35
t=7+35
t=42
Tripp weighs 42lbs.

To check our work:
t+r=49
42+7=49
49=49  CHECK!
5 0
3 years ago
Other questions:
  • Write the function below in the form .P=Po^a^t Is this exponential growth or exponential decay? P=2e^-2.2t
    14·1 answer
  • Help with math homework pls! No wrong answers PLS!!
    13·2 answers
  • Please help I need you guys A farmer sells corn for $2 per pound and blueberries for $4 per pound. The farmer's goal is to make
    13·1 answer
  • The difference of a number q and 8
    10·2 answers
  • What is the value of n?<br><br><br><br> −6.5(n−5)=18.2
    10·1 answer
  • The admission fee at an amusement park is $1.50 for children and $4 for adults. On a certain day, 334 people entered the park, a
    9·1 answer
  • Chicken: 8%=<br> How much and help plz
    7·2 answers
  • What is equivalent to the product (x-4) (x+9)
    8·2 answers
  • Shortbread fingers
    14·1 answer
  • The coordinate grid shows the cost of different numbers of book marks. How many cents do 4 bookmarks cost?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!