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
Oksi-84 [34.3K]
3 years ago
9

Find the solution to this system: 5x-2y=-11 -2x+5y=17 Multiplying equation 2 by will create additive inverses for the x-coeffici

ent
Mathematics
1 answer:
Pachacha [2.7K]3 years ago
8 0

Step-by-step explanation:

5x-2y=11

-2x+5y=17

eqn1×2=10x-4y=22

eqn2×5= -10x+25y=85

21y=107

y=107÷21

5x-2(107/21)=11

5x-(214/21)=11

105x-214=231

105x= 445

x=445/105=

You might be interested in
John is trying to drain a swimming pool. He has two pumps, but he can only use one at a time. He knows that the time a pump take
xeze [42]
What do you mean this sentence?
the time a pump takes to drain the pool varies inversely with the power in watts of the pump,
The meaning would be : if we have a power in watts greater the time to drag the pool will be less because the relation between power and time is inverse.  

40 watts--------------5 hours) 
100 watts------------  x

because the relation between power and time is inverse, we multiply directly.
40 watts(5 hours)=100 watts x
x=(200 watts hours) / 100 watts=2 hours.

Answer: the time would be 2 hours.   (the new pump is faster)
8 0
3 years ago
Can someone help me please :)
Airida [17]

Answer:

C) 3/2

Step-by-step explanation:

- 3x + 2y = 4 \\ 2y = 3x + 4 \\ y =  \frac{3}{2} x + 2 \\ y = mx + b \\ m =  \frac{3}{2}

I hope that is useful for you :)

8 0
2 years ago
Read 2 more answers
What is the sign of-5×-1/-2
Svetradugi [14.3K]
The sign would be negative because there is an odd number of negatives. If there were an even number of negatives it would be positive.

Multiply -5 by -1

The answer would be -5/2
5 0
3 years ago
Work out the circumference of this circle.
Arada [10]

Answer: 52.7856cm

Step-by-step explanation:

Circumference of a circle = 2πr

Note that radius = Diameter / 2 = 16.8/2 = 8.4cm

Circumference = 2πr

= 2 × 3.142 × 8.4

= 52.7856cm

Therefore, the circumference of the circle is 52.7856cm

6 0
3 years ago
Find the length of molding needed for a 10'5" by 9'8" floor
disa [49]
Perimeter = 2(length + width)
p = 2(10'5" + 9'8")
p = 2(19'13")
p = 38'26"

26" = 2'4"

So...
38' + 2'4" = 40' 4" for the perim,eter
4 0
3 years ago
Other questions:
  • Given a = {1, 2, 3, 4, 5, 6, 7, 8, 9} and b = {2, 4, 6, 8} what is AUB?
    11·1 answer
  • It is known that x+y=10 and that x=z show that z+y=10
    15·1 answer
  • This is a math story ok omar is making a scale model of the statue of liberty the statue is 305 feet tall mesuring from the grou
    8·1 answer
  • christian and steven are learning how to ski. Justin falls down every 30 feet. mike falls down every 25 feet. if they both start
    7·1 answer
  • Solve 6x2 = 12x − 24
    10·1 answer
  • BRAINLIEST FOR CORRECT ANSWER, IM FAILING SCHOOL AND NEED HELP ASAP. EVEN OFFICIAL HELP COUNTS
    8·2 answers
  • A plumber charges $80 for a house call and $25 per hour for his services. Which of the following is a linear model of his charge
    15·2 answers
  • Javed is building a birdhouse in the shape of a triangular pyramid. He drew the net for his birdhouse and labeled the dimensions
    9·1 answer
  • 3x + 7 = -11<br><br> how do I solve for x?<br><br> PLEASE HELP - URGENT!!
    6·2 answers
  • ice cream is served for dessert if Gio serves himself and 3 friends half a cup of ice cream how many total pints did Gio and his
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!