Mathematics High School

Selesaikan persamaan linear serentak berikut.
2x + y = -5
3x - 4y = 9

Answers

Answer 1

Answer:

(-1;-3)

Step-by-step explanation:

[tex]\left \{ {{4(2x+y)=4*(-5)} \atop {3x-4y=9}} \right. \ => \ \left \{ {{8x+4y=-20} \atop {3x-4y=9}} \right. \ => \ \left \{ {{11x=-11} \atop {2x+y=-5}} \right. \ => \ \left \{ {{x=-1} \atop {y=-3}} \right.[/tex]

Related Questions

helppp
what is the slope?

Answers

Answer:

I don't see the image either-

Step-by-step explanation:

Upload this again please so we can answer this :')

One kilometer is 1000 meters. 1. Complete the table. meters kilometers 1,000 1 250 12 1

Answers

1000 km = 1000000 meter
1 km= 1000 meter
250 km = 250,000 meter
12 km = 12,000 meter

(1/2a - 2/3b) ( 3/5a + 2/3b) multiply the following ​

Answers

Answer:

Step-by-step explanation:

[tex](\dfrac{1}{2}a-\dfrac{2}{3}b)(\dfrac{3}{5}a+\dfrac{2}{3}b)=\dfrac{1}{2}a*(\dfrac{3}{5}a+\dfrac{2}{3}b) - \dfrac{2}{3}b*(\dfrac{3}{5}a+\dfrac{2}{3}b) \\\\\\= \dfrac{1}{2}a*\dfrac{3}{5}a + (\dfrac{1}{2}a*\dfrac{2}{3}b) - \dfrac{2}{3}b*\dfrac{3}{5}a- \dfrac{2}{3}b*\dfrac{2}{3}b\\\\\\=\dfrac{3}{10}a^{2} + \dfrac{1}{3}ab - \dfrac{2}{5}ab -\dfrac{4}{9}b^{2}\\\\=\dfrac{3}{10}a^{2} +\dfrac{1*5}{3*5}ab-\dfrac{2*3}{5*3}-\dfrac{4}{9}b^{2}\\\\\\[/tex]

[tex]=\dfrac{3}{10}a^{2}+\dfrac{5}{15}ab-\dfrac{6}{15}ab -\dfrac{4}{9}b^{2}\\\\=\dfrac{3}{10}a^{2}-\dfrac{1}{15}-\dfrac{4}{9}b^{2}[/tex]

WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER + 100 POINTS WHEN YOU DO ANSWER!!

Hello, below I have a screenshot of the question I need to be answered in particular. I would also like to have an explanation as to how you got the answers you did please. I will move on to try other questions whilst I wait, to see if I may be able to do something different without getting stuck again. Thank you for your time and I hope you have/had a good day(or night)!

Answers

y=-2x(squared)+3x-7

the 2x is squared

hope that helped

pls help 20 points if u answer

Answers

i have absolutely no idea i hate math so much

Someone plz help me :(

Answers

Answer: 5 : 12

Step-by-step explanation:

the total flower = 5 + 7 = 12

so tulips to total flowers = 5 : 12

please give me a brainliest answer

Answer:

the answer is D

Step-by-step explanation:

hopefully im right

I really need help for this I need explanations of this please I need to submit right now please help

Answers

No because a rigid motion does not change the area (shape or/and size). It would be a non-rigid motion because is B was to be on planted on A it would overlap A.

that's it can you did it?​

Answers

Answer:

no sorry

Step-by-step explanation:

i just need the points tho so thanks

Answer:

[tex] \sqrt[3]{16 {a}^{3} } = \sqrt[3]{2(8) {a}^{3} } = 2a\sqrt[3]{2} [/tex]

I hope I helped you^_^

How much will you pay in all for the $78 lunch bill with a 15% tip ?

Answers

→ You will pay $ 89.7.

The tip value is based on the bill value. Hence, to find the total payment you have to multiply 78 by 1.15 (this includes the tip, 1.15).

[tex]\Large \text {$Total = 78 \times 1.15 = 89.7 $}[/tex]

Or you can first find how many 15% is from $78:

[tex]\Large \text {$0.15 \times 78 = 11.7$}[/tex]

And then add this to $78:

[tex]\Large \text {$78 +11.7 = 89.7$}[/tex]

→ See more on:

https://brainly.com/question/12901165

Answer:

$89.70

Step-by-step explanation:

15/100=0.15

78 * 0.15 =89.70

The velocity of a moving body is given by the equation V = 12t – 6t2. For what
value of t is the velocity greatest?

Answers

Answer:

greatest velocity 6

Step-by-step explanation:

v=12t-6t2

dv/dt=0

12-12t=0

t=1

v at t=1=12-6=6

help :)))))))))))))))))))))))))))))

Answers

Answer:

-6 is the same as Subtracting 6, C.

Hope this helps!

Step-by-step explanation:

For example,

5 - 6

5 is positive, +5

and 6 is negative, -6

Answer:

easy subtracting 6 :))

Step-by-step explanation:

can i get brainliest uwu^_^

In 1990 the profit of Gamma company was 11,218,614 . each year after 1990, profits fell by 13,189 on average. construct a linear model for this scenario and use it to solve the profits in the year 2020.

Answers

Answer:

4019800

Step-by-step explanation:

number name

4 million 19 thousand 800

Help me please !!!!!

Answers

Answer:4.2 ft/sec, 63 feet, -2 points

Step-by-step explanation:

1.  21 feet/5 sec = 4.2ft/sec

2.  15 sec*(4.2ft/sec) = 63 feet

3.  2-5-3+4 = -2 points

What division problem is being modeled? Please ignore the 3/4!

Answers

Answer:

4 groups of 3

Step-by-step explanation:

cho tập hợp A=(2;7)và tập hợp B=[7;10]tìm tập hợp a∩B

Answers

sorry po di ko ma intindihan

Step-by-step explanation:

sorry po

what is the length of wz??

Answers

I think it’s b
——————————-

y = 6(x – 3)2 + 4
How do I rewrite the quadratic function in standard form

Answers

Answer:

6x^2 -36x + 58

Step-by-step explanation:

expand (x-3)^2 = x^2 -6x +9

6(x-3)^2 +4=6(x^2 -6x +9) +4 =6x^2 -36x + 54 +4 = 6x^2 -36x + 58

Answer fasttt please help!!!

Answers

What the question I will answer fast and fix your help

the difference between 4/9 of a number and seven is five

Answers

Answer:

if x is the number

4/9x - 7=5

4/9x= 7+5

4/9x= 12

x= 12×9/4

x= 108/4

x=27

Write 0.0038 as a fraction.

Answers

Answer:

0.0038 = 19/5000

If the probability for an event is 1/6, what would that be as a percent rounded to the nearest tenth?​

Answers

Answer:

16.7%

Step-by-step explanation:

1/6 as a percent is 16.67 and to round to the nearest tenth would make that number 16.7

Please help me this question

Answers

5x-147=2x
3x=147
X=49
Smallest angle is 49*2=98

Answer:

Angle C = 48°

Step-by-step explanation:

Kites have one pair of congruent angles.

In this case it is B and D:

m∠B = m∠D5x - 147 = 2x5x - 2x = 1473x = 147x = 49

Find the measure of B and D:

m∠B = 2*49 = 98°

Find the measure of angle C:

m∠C = 360 - 2*98 - 116 = 48°

The smallest angle is C

Noel bought a 10 ounce box of cereal for $1.63. What was the cost per ounce?

Answers

Answer:

0.163 per ounce

Step-by-step explanation:

Find the range of data set 10, 18, 21, 28, 12, 20

Answers

Answer:

range 18

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

1. The range of a data set is the difference between the largest and smallest number. In this case, the largest number is 28, and the smallest number is 10.

[tex]28 - 10[/tex] [tex]18[/tex]

Therefore, the range is 18.

Can u help me with this please it’s due in 5 mins. Find value of x.

Answers

Answer:

x = 35°

Step-by-step explanation:

Co-interior angles add up to 180°, so:

2x + 43 + 2x - 3 = 180° (now, simplify)

4x + 40 = 180° (subtract 40 from both sides)

4x = 140° (divide both sides by 4)

x = 35°

Hope this helps!

Answer:

x=35

Step-by-step explanation:

given: two lines cut by a transversal to find x

solution: the given two angles are supplementary since they are consecutive interior angles.

(2x+43)+(2x-3)=180°

⇒ 4x+40=180°⇒4x=140°

⇒x=[tex]\frac{140}{4}[/tex]=35

hope this helps :)

Jenna is having her birthday party at the ice cream palace. The ice cream party palace charged 2.49 for each ice cream cone and 24.99 for a birthday cake Jenna decides to buy a birthday cake and an ice cream cone for each of her friends. Jenna needs to determine the total cost for her birthday party.

Answers

Answer:

multiply the cost of the ice cream cones by the amount of friends then add the cost of the birthday cake.

example: (2.49 × n) + 24.99 = a

I would give you an answer but I dont have enough information, I'm sorry for the inconvenience.

help angels this geometry is a pain in the 4$$

Answers

Answer:

1. 4.5

2. The scale factor is 3/4

Step-by-step explanation:

a new car increased in price from 78200 to 136850 what is the percentage increase

Answers

Answer:

The percentage increase is by 1.75

Step-by-step explanation:

78,200 x 1.75 = 136,850

A tiger shark swims an average of 32 miles per hour. About how many hours will it take the tiger shark to swim 8 miles?

Answers

Answer:

0.25 hours, or 15 minutes

Step-by-step explanation:

Ok, so the rate is 32 miles per hour, so it would take about 1/4 of a hour to go 8 miles (8/32= 0.25)

help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Hey

(a+b)^2 = a^2+2ab+b^2

(a+b)^3 = a^3+3a^2b+3ab^2+b^3

PHOTO MATH (app) , it’s really helpful.
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