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
Gre4nikov [31]
3 years ago
8

X+y = -16 —3х – у = 30

Mathematics
1 answer:
lys-0071 [83]3 years ago
8 0

Answer:

x = -7, y = -9

Step-by-step explanation:

The coefficient (the number before) the y is the same but the signs are opposite so add the equations together:

x-3x+y-y=-16+30

-2x=14

x=-7

y=-16-x=-16--7=-9

You might be interested in
Find the radius of the circle if the center is at (1, 2) and the point (-3, 4) lies on the circle.
Anton [14]

Answer:

2√5

Step-by-step explanation:

The radius is the distance from the center to a point anywhere along the edge of the circle. To find the distance between these two points, use the distance formula.

d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2} \\d = \sqrt{(1--3)^2 + (2-4)^2}\\ d = \sqrt{4^2 + -2^2}\\ d = \sqrt{16 + 4}\\ d = \sqrt{20} \\d = 2\sqrt{5}

7 0
4 years ago
Read 2 more answers
If 10x+6y=7 is a true equation, what would be the value of 6(10x+6y)?
aleksandr82 [10.1K]

Answer:

42

Step-by-step explanation:

We know that 10x + 6y = 7, and so

6(10x + 6y) = 6(7) = 42

8 0
3 years ago
Answer some of the questions, please
zloy xaker [14]

Answer:

1)= a 30

2)= b 2¹⁰

3)= d 0.75²

I only know this

mark me brainliest pleasee

4 0
3 years ago
Read 2 more answers
Which is the equation of a hyperbola with directrices at x = ±3 and foci at (4, 0) and (−4, 0)?
photoshop1234 [79]

Answer:A. x squared over 16 minus y squared over 4 ...

Step-by-step explanation:

4 0
2 years ago
Tommy is ordering concrete for a construction project. The price of concrete is $.02 per pound. Concrete is also taxed at a rate
uysha [10]

Answer:

$1000

Step-by-step explanation:

We are given that,

Price of concrete = 0.02 dollars per pound

Tax rate on concrete = 0.03 per pound

Thus, the total cost of the concrete = 0.02 + 0.03 = 0.05 dollars per pound

Since, we know,

1 pound = 0.0005 tons

As, Cost of 1 pound = $0.05

i.e. Cost of 0.0005 tons = $0.05

Then, cost of 1 ton = \frac{0.5}{0.0005} = $1000.

Hence, the cost Tommy needs to pay is $1000.

8 0
3 years ago
Other questions:
  • Goals and purpose of the BIA – unique to your scenario b. Summary of Findings – business functions and assessment c. Prioritizat
    8·1 answer
  • A pail holds 6 3 4 gallons of water. How much is this in cups? Write your answer as a whole number or a mixed number in simplest
    5·1 answer
  • If f(x)=3x+5/x what is f(a+2) A. 3a+ 5/a+2 B.3(a+2)+5over a+2 C.3(f(a))+ 5 over f(a)+2
    7·1 answer
  • How to write twelve hundredths in expanded
    7·1 answer
  • Can someone PLZZZZ HELP!!!!
    15·1 answer
  • The following data sets can be modeled linearly. Data Set M: {(14,95),(9,85),(4,65),(6,80),(3,73),(12,107),(7,64),(12,86),(10,96
    7·1 answer
  • Lucy uses 1/5 of a cup of vinegar in her salad dressing recipe. How much vinegar would Lucy use to make 5 recipes?
    9·2 answers
  • A student answered 56 problems on a test correctly and received a grade of 80%. How many (total) problems were on the test if al
    5·2 answers
  • Slope of a line Assignment​
    9·2 answers
  • HELP PLEASE!!!<br> Rewrite using the distributive property. -(6x-17)=[?]x+[]​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!