Please answer this today - First correct answer becomes brainliest


Suppose you know x+2y=-1 and 3y-x=-19. What is xy?

Answers

Answer 1
{ x+2y = -1
{ 3y-x = -19

{ x = -1-2y
{ -x = -19-3y

{ x = -1-2y
{ x = 19+3y

-1-2y = 19+3y
y = -4

x = 19+3(-4)
x = 7

(x,y) = (7,-4)

——
check solution
{ 7+2(-4)=-1
{ 3(-4)-7=-19

{ -1 = -1
{ -19 = -19

Related Questions

Help me please I need help

Answers

Step-by-step explanation:

angle B+angle C = 180°

= angle B= 180-79

= angle B = 101°

therefore angle A = 79°

angle D = 101°

PLEASE HELP!!!!!!! DESPERATE!!!! 20 points!!!!!
It has to be written like a +bi!!!!
Simplify the expression to a + bi form:
√81+√-6-√64+√-150

Answers

Answer:

uno de los 5 mejores deseos para el colegio y para la comunidad educativa en la definición 3 x 6=√57

each side of a square is 3 inches long. A student increases the length of each side by 3 inches. the area of the new square is how many times the area of the original square.​

Answers

Answer:

4 times larger

Step-by-step explanation:

3² = 9

(3+3)² = 36

36 is four times larger than 9

write the general form of rational numbers​

Answers

Answer:integers and 0 q ≠ , is called a rational number. ... A rational number is said to be in the standard form, if its denominator is a positive integer and the numerator and denominator have no common factor other than 1.

Step-by-step explanation:

1.       Andrea y Margarita decidieron compartir gastos en un apartamento, de manera proporcional a sus sueldos. Si Andrea gana $650.000 y Margarita gana $950.000 y, además los gastos de la casa son de $1’100.000 ¿Cuánto debe aportar cada una?​

Answers

500,000 creo yo no sé puede ser

2^4 (which number is the base)?

Answers

2, 4 is the exponent

What is the center and radius of this circle? HELP!

Answers

Answer:

Center: at the point (-3, 2)

Radius: 3 units

14. The table below represents an inverse
variation function. What is the constant of
variation?
SHOW ALL WORK !!

Answers

Step-by-step explanation:

Let xy = k, where k is the constant of variation.

By using values of x and y in the table,

we see that (2)(48) = (4)(24) = (12)(8) = 96.

Hence k = 96, which is our answer.

The diameter of a circle is 6 units.
What is the radius of the circle?
-khan academy

Answers

The radius of the circle is 24

Please only show me the check how you get the check from 1 to 5

Answers

The answers and solution from 1-5 is below. Hope this helps.

Which expression is equivalent to 4(2x +3)?

a.4 + 2x + 4 +3
8x + 12

c.8x + 3

d.
4 + 2x + 12

Answers

Answer:

c 8x+3 all you do is multiply 4 and 2 to get 8 and add an x

If 100 soldiers can eat 100 dozen rations in a week, how long will it take 400 soldiers to eat 400 dozen rations?

Answers

Answer:

1 week

Step-by-step explanation:

100 soldiers / 100 dozen = 1 soldier / 1 dozen

400 soldiers / 400 dozen = 1 soldier / 1 dozen

Therefore, it also takes a week for 400 soldiers to eat 400 dozen rations

que número sumado da 7 y multiplicado da -
18​

Answers

Answer:

hukiiiiibcgczxjwisisisigyjgffguhhhijhf

Step-by-step explanation:

xcfgghsjwueueueuririgg&jjikhffxghjh

what is 98 = u/7
PLz help

Answers

Answer:

u=686

Step-by-step explanation:

98=u/7

7*98=7*u/7

u=686

I Need help with this

Answers

Answer:

9 Miles

Step-by-step explanation:

Distance = Speed×Time

12× (45/60)

ASAP PLASE HELP AND SHOW WORK
Each choice below describes the lengths of the sides of a triangle. Select all the triangles that must be right triangles.

Triangle a- √3,√4,√5

Triangle b- 3,4,5

triangle c- 2,4,6

Triangle d- √2,√4√6

Answers

Answer:

triangle b and triangle d

Step-by-step explanation:

3^2+4^2=5^2

2+4=6

Answer:

Triangle b- 3,4,5

5²=3²+4²

Triangle d- √2,√4√6

(√6)²=(√2)²+(√4)²

Find the value of r so the line that passes through each pair of points has the given slope.
(1, r), (7, 5), m = 2/3

Answers

Answer:

r = 1

Step-by-step explanation:

slope = change in y / change in x, so:

change in y / change in x  = 2/3

5 - r / 7 - 1 = 2/3

5 - r / 6 = 2/3

[tex]\frac{5-r}{6}=\frac{2}{3}[/tex]

now solve this equation.

first, multiply both sides by 6 to get rid of the fraction:

[tex]5 - r = 4[/tex]

subtract 5 from both sides

[tex]-r=-1[/tex]

multiply both sides by -1

[tex]r=1[/tex]

I need help and show work​

Answers

A = 22 x 60 = 1320

B = 60 x 60 = 3600

Hope this helps. I'm not smart ;w;

Jayson said, "I am thinking of two fractions that when added have a sum of 1." Which fractions could Jayson have been thinking about?

Answers

Answer:

he could have been thinking of 1/2 + 1/2 or 4/8 + 4/8 or maybe 5/10 + 5/10

because 2/2=1 and so does 8/8 and 10/10

Step-by-step explanation:

What is the length if the diameter in the circle shown below?

Answers

Answer:

d = 7

Step-by-step explanation:

In the circle shown, the radius is 3.5. The diameter is double the radius (d = 2r), so:

d = 2 (3.5)

d = 3.5 + 3.5

d = 7

Write down the solution to these simultaneous equations. y=2x + 1 and y= 0.5x - 2

Answers

Answer:

(-2, -3)

Step-by-step explanation:

y=2x + 1

y= 0.5x - 2

2x+1= 0.5x -2

1.5x= -3

x= -2

y= 2x+ 1

y= 2(-2)+1

y= -3

The solution is (-2,-3)

The solution to the set of simultaneous equations is; (-2, -3)

We are given the equations;

y = 2x + 1   ---(eq 1)

y = 0.5x - 2   ---(eq 2)

subtract eq 2 from eq 1 to get;

0 = 2x - 0.5x + 1 - (-2)

0 = 1.5x + 3

x = -3/1.5

x = -2

Thus;

y = 2(-2) + 1

y = -4 + 1

y = -3

Read more at; https://brainly.com/question/12647791

The figure is a parallelogram.
True false

Answers

Answer:

Which picture?

Step-by-step explanation:

Also I am guessing false but I don't see the picture

5

Jill built a robot to enter a race at her school. The robot travels 8 meters in 3 seconds.

how many meters can the robot travel in each second?

Answers

Answer:

8 is answer why can't I send

1After paying off her two-year loan of $5000, Janice noticed she had paid a total of $5200. Find
out what interest rate they used to charge her during this time.

Enter your answer

Answers

Answer:

2%

Step-by-step explanation:

Interest = Principal x Rate x Time

200 = 5000(2)·r

200/10000 = r

r = 2/100 which is .02 or 2%

find the radius circumference of this circle

Answers

Answer:

YOUR QUESTION IS NOT COMPLETE WITHOUT MENTIONING ANY FOLLOWING NUMBERS WE CANNOT FIND THE CIRCUMFERENCE OR diameter,radius....

DIU
metry:The vertices of AABC represent the buoy markers that form the legs of the course for a swim race. What is the distance from marker C to marker
A? Round your answer to the nearest tenth of a meter.

Answers

Answer:

130.5

Step-by-step explanation:

The solution is,  the value of x is approximately 116.5 meters.

What is trigonometry?

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

here, we have,

We are given the following information

From this picture, we want to find the vaule of x. To so, we will use the sine law. to solve this problem.

The sine law relates the sine of the angles of the triangle and the length of the opposite sides of the triangle. If we have a triangle of the form

Then,the sine law states that

sinA/a =sinB/b =sinC/c

Which is equivalent to

a/sinA = b/sinB = c/sinC

In our case, we are given the measure of angles A and B and missing the measure of angle C. Also, we are given the measure of side c. If we apply the sine law to the given triangle we have

x/ sin 35  = 200/ sin 80

So, first we need to identify the value of C. To do so, we will use the following fact:

The sum of the inner angles of a triangle is 180°.

Then, we have the following equation

65 +35 +C = 180

If we operate on the left side, we get

100+C = 180

So, by subtracting 100 from both sides, we get

C= 80

So, if we replace the value of C in the equation we had, we get

x/ sin 35  = 200/ sin 80

If we multiply both sides by sin(35) we get

x = 200* sin 35/ sin80

so, using a calculator we get

x = 116.5

so the value of x is approximately 116.5 meters

To learn more trigonometry click:

brainly.com/question/26719838

#SPJ7

WILL MARK BRAINLIST please help me ive done this like 9 times and i cant figure this out
will mark brainlist if correct

Answers

Answer:

30

1.301

Step-by-step explanation

f(x) and g(x) are inverse functions.  Note that the logrithmic notation for [tex]f(x) = y = b^{x} \\ is\\ log y_{b} = x[/tex]

So, when x = 1.477,  f(x) = y = 30

and when x = 20, g(x) = y = 1.301

Are the ratios 3:5 and 6:10 equivalent?

Answers

Answer:

Yes

Step-by-step explanation:

An equivalent ratio is two or more ratios that have the same proportion. 3:5 and 6:10 do, so they are equivalent. An explanation is below.3:5 is exactly half of 6:10. I will explain the math in the steps below6 ÷ 2 = 310 ÷ 2 = 5Put them together: 3:5

I hope this helps!

Solve for x, then find the perimeter. You should select TWO answer choices.
18
3x
52
T
12
B
D
V
a
P= 140
x = 6
C
x = 18
d
P= 128

Answers

Answers:

x = 6 and P = 128

=================================================================

Explanation:

The tangents CT and CU are equal to each other. The rule is that tangent segments that meet at a common point are the same length.

Let's solve for x

CT = CU

3x = 18

x = 18/3

x = 6

Because CT = 18, this makes BC = BT+TC = 12+18 = 30

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

For similar reasoning as mentioned earlier, we can say tangents BT and BV are the same length. This means BV = 12.

Segment CD = 52 and CU = 18, which makes UD = CD-CU = 52-18 = 34

From there, we can say segment DV = 34 also. This leads to BD = BV+VD = 12+34 = 46

Triangle BCD has the three sides

BC = 30CD = 52BD = 46

The perimeter is

P = sum of the three sides

P = (side1)+(side2)+(side3)

P = BC + CD + BD

P = 30+52+46

P = 82+46

P = 128

find the n term of this number sequence 15,12,9,6

Answers

this sequence is decreased by 3 for every digit

so

-3n+18

-3n+18

1) Find the difference (Decreasing by -3)
2) N is -3
3) Find the number before the first digit (15+3 = 18) as if we follow the difference of -3: 18-3 gives us 15.

Therefore, the nth term is -3n+18
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