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
Natalka [10]
2 years ago
7

Please answer fast this is due soon

Mathematics
1 answer:
ladessa [460]2 years ago
6 0

Step-by-step explanation:

multiply the first equation by 1, the second by -1 and add.

x + 2y = -16

-x - 6y = 28

--------------------

0 - 4y = 12

-4y = 12

y = -3

x + 2×-3 = -16

x - 6 = -16

x = -10

You might be interested in
a country will produce 3000 missels this year. each of the short range missles costs $200,000 to produce. Each of the medium ran
guapka [62]

Answer:

Step-by-step explanation:

3000/10=300   300=10% of total missiles

300*3=900(30%)   That country (assuming it is Iran) would produce 900 short missiles and 900 medium missiles. 3000-900(2)=3000-1800=1200.

Iran will produce 1200 long range missiles.

For the cost of the missiles,

200,000*900=180,000,000. 300,000*900=270,000,000.

870M-(180M+270M)=870M-450M=420M

420,000,000/1200=350,000.

Long Range Missiles are $350,000 each... got me thinkin bout buying some...

5 0
3 years ago
A counterexample for the expression sin y tan y= cos y is 0.
umka21 [38]

Answer:

True

Step-by-step explanation:

To answer this question we must evaluate

y = 0° on both sides of the equation.

For the left side we have:

sin(0\°) tan(0\°)

We know that tan(0\°) =\frac{sin(0\°)}{cos(0\°)}

We know that cos(0\°) = 1 and sin(0\°) = 0.

Therefore tan(0\°) = 0.

Then the left-hand side of the equals is equal to zero.

On the right side we have:

cos(y)

When evaluating cos(y) at y = 0

We have to cos(0\°) = 1.

0 ≠ 1

The equation is not satisfied. Therefore y = 0 ° is a counterexample to the equation

3 0
3 years ago
Read 2 more answers
The sum of 3/4 and 18/19
SIZIF [17.4K]
The answer to this question is 2.
4 0
3 years ago
Read 2 more answers
WHERE DO THE NUMBERS GO? help!!!!!!
Marat540 [252]

Answer:

Other: \frac{3}{4} , 0.25

Whole Numbers: -20, -6

Natural Numbers: 532, 10, 0, \frac{6}{2}

Step-by-step explanation:

Natural numbers have to be positive whole numbers such as 10 and 0

Whole numbers are similar, but you can have negative numbers here. You just can't put fractions in there.

The 3rd section is a little odd, Integers don't use fractions or decimals, same as whole numbers. The fractions and decimal numbers would go outside of that section.

Extra note: \frac{6}{2} might be a tricky one because it is in fraction form but it is also written as 3. This means it is a natural number. The reason numbers such as \frac{3}{4}  and 0.25 are not natural numbers is because they cannot be put as whole numbers.

6 0
3 years ago
What is equivalent to -1/4y -2 1/4y + 1/2 (4-2y) a) -3y + 2 b) -3 1/2y + 2 c) -4y + 4
Amanda [17]

Answer:

B. -3 1/2y + 2

Step-by-step explanation:

Our expression is: \frac{-1}{4} y-2\frac{1}{4} y+\frac{1}{2} (4-2y).

Let's first distribute out that parentheses. Remember that distribution is simply taking the sum of the product of the outside term with each of the inside terms. Here, the outside term is 1/2 and the inside terms are 4 and -2y:

\frac{1}{2} (4-2y)=\frac{1}{2} *4+\frac{1}{2} *(-2y)=2-y

Now, we have:

\frac{-1}{4} y-2\frac{1}{4} y+2-y

We want to combine like terms, which means combining all the terms with y in them:

\frac{-1}{4} y-2\frac{1}{4} y-y+2=\frac{-1}{4} y-\frac{9}{4} y-\frac{4}{4} y+2=\frac{-1-9-4}{4} y+2=\frac{-14}{4} y+2=\frac{-7}{2} y+2

Remember that -7/2 can be written as the mixed number -3 1/2, so our final answer is:

-3 1/2y + 2

The answer is thus B.

<em>~ an aesthetics lover</em>

7 0
3 years ago
Other questions:
  • a scientist wants to study 24 stars he studies 1/3 of them one week and 1/4 of them next week how many of them are left to study
    12·1 answer
  • Diameter = 6 inches circumference =?
    10·2 answers
  • the diagonal of Andres rectangular TV screen is 39 in. The width of his TV screen is 34 inches. Which measurement is closest to
    6·2 answers
  • Find the center (h, k) and the radius r of the circle 4 x^2+ 7 x+ 4 y^2 - 6 y - 8 = 0 .
    7·1 answer
  • What is the image of (-5, -1) after a reflection over the x-axis?​
    15·2 answers
  • I want to know what to do with my Brainly points. I have all the points I’ll ever need, and I hate answering questions because p
    10·2 answers
  • PLEASE ANSWER ASAP WILL MARK BRAINLIEST SHOW WORK
    8·1 answer
  • The Table below is a data set that lists how many pairs of shoes are owned by some of your classmates.
    10·1 answer
  • Find dy/dx by implicit differentiation. 5y sin(x2) = 3x sin(y2)
    12·1 answer
  • On a coordinate plane, a line is drawn from point R to point Q. Point R is at (4, negative 1), and point Q is at (negative 5, 3)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!