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

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

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.

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

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 :')

what is the length of wz??

Answers

I think it’s b
——————————-

pls help 20 points if u answer

Answers

i have absolutely no idea i hate math so much

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:

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.

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:

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

Write 0.0038 as a fraction.

Answers

Answer:

0.0038 = 19/5000

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

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^_^

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

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.

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

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

Answers

Answer:

4 groups of 3

Step-by-step explanation:

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

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

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)

Answer fasttt please help!!!

Answers

What the question I will answer fast and fix your help

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

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

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

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

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 :)

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^_^

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

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.

(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]

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