Mathematics High School

Solve the system of linear equations by elimination.
-5x+12y=8
2x-8y=0

Answers

Answer 1

Answer:

x = -4

y = -1

Step-by-step explanation:

-5x+12y=8

2x-8y=0

We multiply the first equation by 2 and the second equation by 5

-10x + 24y = 16

10x - 40y = 0

-16y = 16

y = -1

Now put -1 back in for y and solve for x

-5x + 12(-1) = 8

-5x - 12 = 8

-5x = 20

x = -4

Let's check

-5(-4) + 12(-1) = 8

20 - 12 = 8

8 = 8

So, x = -4 & y = -1 is the correct answer.

Related Questions

A cylinder with a diameter of 8 inches and height of 12 inches.
Ross is wrapping a gift. The package is shaped like the cylinder shown. What is the least amount of paper he needs to cover the entire cylinder? Use 3.14 for Pi.
401.92 in.2
602.88 in.3
1004.8 in.2
2411.52 in.3

Answers

Answer:

401.92 in.2

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

PLEASEEE HELPPP me!!!!!

Answers

Since you have 2/3 and after you give the bus driver chocolate you have 1/3 left, then you have the bus driver 1/3 because 1/3+1/3 equals 2/3. So you give the bus driver 1/3

I REALLY NEED AN ANSWER FAST! Which statement about the diagram is true?

A. m1 m3 + m4

B. m1 + m2 m2 + m3 + m4

C. m2 = m3 + m4

D. m1 m4

Pick one of the answers

Answers

Answer:

D

Step-by-step explanation:

To keep it short, refer to triangle exterior angle theorem.

Edit: If you want the full explanation,

A isn't the answer. The triangle exterior angle states that the measure of the 2 triangle interior add up to the the exterior angle of the other interior angle within the triangle.

Meaning that

measure of angle 1 equal the measure of 3 and 4 combined.

B. is wrong they are equal to each other because angle 2 is equal to angle 2

angle 1 is equal to angle 3 and 4

So they are equal

C.Wrong unless it a 30 60 90 triangle or 45 45 90 triangle, C is wrong

D. is right since measure of angle 4 and angle 3 add up to angle 1, angle 4 would be lesser than angle 1.

Answer:

d

Step-by-step explanation:

Answers PLSSSSSSSS HELP CORRECT ANSWER GETS BRAINLIEST
1.A
2.B
3.C

Answers

it is a have a nice day

Answer:

A

Step-by-step explanation:

The height of the triangle must be perpendicular to the base of the triangle and the segment A is perpendicular to the given height.

please answer correctly and quickly all the question-answer all the questions, please

Answers

Answer:

Step-by-step explanation:

81= 3 times k. K equals 27

4x-12 = 18. X is 5

4x-3=5. X is 2

4x-2=38. Answer is C

I hope this helps!

Plz, Plz, mark Brainliest!

11) 4x-3=5
+3 +3
4x=8
/4 /4
x=2

14) 81=3k
/3 /3
27=k

The last question) 4x-12=8
+ 12 +12
4x=20
/4 /4
x=5

HELP ME ILL GIVE BRAINLIEST

Answers

Answer:

D is correct but this is the math section, please put these in the history section

Answer:

Looks good to me

Step-by-step explanation:

"The Court took the position that school officials could not prohibit only on the suspicion that the speech might disrupt the learning"

can anybody help pls

Answers

Answer:

2t

Step-by-step explanation:

The expressions are not the same because different terms are negative. We can visualize the difference by rewriting the expressions as 13t + (-2t) and (-13t) + 2t. In the first expression, 13t-2t, the 2t is negative because it is being subtracted, and subtracting a number is the same as adding a negative.

The answer is 2t ^^ hope this helps

help it's due todayyyyy​

Answers

Answer:

yes

Step-by-step explanation:

Determine if the lines are parallel, perpendicular or neither. Show all work.

x - 5y = 30 and 10y = 2x + 90

Answers

Answer:

The lines are parallel

Step-by-step explanation:

Answer:

Step-by-step explanation:

Put the equations into slope-intercept form.

x-5y = 30 ⇒ y = ⅕x - 6

10y = 2x + 90 ⇒ y = ⅕x + 9

Both lines have slope = ⅕, so the lines are parallel.

Please help the problem is in the picture below.

Answers

its either a or d but positive its a

What is the greatest common factor (GCF) of 24 and 40?
8, 4, 24, or 16

Answers

Answer:

8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

Factors of 24 and 40

24:  1, 2, 3, 4, 6, 8, 12, 24

40:  1, 2, 4, 5, 8, 10, 20, 40

8 comes as the GCF of both

Find the value of x.
A. 90
B. 70
C. 20
D. 50​

Answers

Answer: B. 70

Step-by-step explanation:

i actually can't tell but i think this is right

If micheal invests $2000 in the bank at a rate of 5.5% for 6 years how much interest will he make?


help me plz

Answers

Answer:  14,533.79 don´t take my word for it

Step-by-step explanation:

Future Value of Annuity Due

P = 2,000

r = 5.5% (0.055)

n = 6

1.055 * (2,000 * [(1 + 0.055)^6 - 1)/(0.055)])

= 14,533.79

choose the two number sentences that are true a.5+7=11+2 b.3+8=20-9 c. 5+9=19-4 d.12+7=5+14 e.18-6=15-2

Answers

Answer:

B) 3+8=20-9 & D) 12+7=5+14

Step-by-step explanation:

3 + 8 = 11, 20 - 9 = 11

12 + 7 = 19, 5 + 14 = 19 :)

please help me I will mark you brainliest

Answers

Answer: q=4

Step-by-step explanation:

help! help! help! Please help me! question is on image below!

Answers

Answer:

D

Step-by-step explanation:

Hope you get a 100% on the test

disclaimer: this is just so u can mark that person brainliest

Round 0.9271 to the nearest whole number.

Answers

Answer:1

Step-by-step explanation:

Because 9 is a rich numbers uwill borrow one to the other side so it will become 1.0000

Answer:

1 is round off of 0.9271to the nearest whole number.

solve for x or find x ​

Answers

Answer:

considering fig. as rectangle.... diagonal are equal

so...8x-10=14

8x=24

x=3

Solve each proportion help pls

Answers

17)mixed form x=5 7/17 exact form 92/17

18)x=49

19)mixed form x=30 6/7 exact form x=216/7

20)mixed form x=2 1/4 exact form x=9/4

A scalene triangle has

A. No line of symmetry
B. one line of symmetry
C. two line of symmetry
D. three line of symmetry ​

Answers

Answer:A

scalene triangle is a triangle that has three unequal sides

Step-by-step explanation:

WILL MARK YOU BRAINLIEST

Answers

Answer:

see in the picture, we have Z(-3; -3)

so after a D(1/3), we have:

x' = -3.1/3 = -1

y' = -3.1/3 = -1

=> Z'(-1; -1)

Name three collinear points and non collinear points
I want all the answers please

Answers

L, J, and K are collinear. A, B, C, D, E, F are noncollinear.
The SAS Postulate states that if two sides of one triangle are congruent to
two sides of a second triangle, then the triangles are congruent if the angle
between the congruent sides is equal.

Numbers 100 to 125 are written on separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking in to it. What is the probability of getting a number 108?

Answers

Answer:

1/25

Step-by-step explanation:

In 100 to 125, the difference is 25.

so, there is only 1 possibility of there being 108 from 100 to 125 so its 1/25

Question 11
A house is currently worth $120,000 and is increasing in value at a rate of 6% per year
Which explicit expression would model the value of the house after 3 years?
A
120,000(0.94)3
B
120,000(1.06)
120,000 + 0.94 (3)
120,000 + 1.06 (3)
D

Answers

Answer





B




If it increases 6% after 3 years it would be something like B

Please Help Me With This Question

Answers

Answer:

4/4 quarters

Step-by-step explanation:

hope this will help you

Answer:

2 quarts

Step-by-step explanation:

based on the model there are 4 cups in 1 quart so there will be 8 cups in 2 quarts

Hailey planted
30 tomato seeds. Three out of every 5 seeds grew
into tomato plants. How many tomato plants
does Hailey have?

Answers

Answer:

18 seeds

Step-by-step explanation:

3 x 6 = 18 seeds

3/5 x 30 = 18 seeds

Hope that helps!

A right triangle has legs 2m and 3m in length. What is the
length of its hypotenuse?

Answers

Answer:

First option) √13 m

Step-by-step explanation:

Using the Pythagorean theorem. 2^2+3^2=c^2

4+9=c^2

13=c^2

c=3.61

3.61 meters

What Does 6 More Than X Mean

Answers

Answer:

if x is an unknown number you know that it is 6 more than the unknown number

Step-by-step explanation:

6x – 8y = -94
-X + 8y = 49
a. Subtract to eliminate y.
b. Subtract to eliminate x.
c. Add to eliminate y.
d. Add to eliminate x.

Answers

Answer:

photomath, assistant in mathematics, will decompose everything and give the correct answer.


Triangle ABCis rotated 90° clockwise around the origin to get
triangle A'B'C. Find the length of the line segment, AC
A. 2.23
OB. 4.47
O c. 2.44
D.2

Answers

Answer:

The distance A’C’ is 4.47 units

Step-by-step explanation:

Before we go on, we need to get the appropriate transformation

Mathematically, we have a 90 degrees clockwise rotation yielding the following;

(x,y) to (-y,x)

A is (-4,1)

C is (-2,5)

By transforming, we have

A’( -1,-4)

C’ (-5,-2)

To get the magnitude of the line segment, we are going to use the distance formula between points

We have this as;

D = √(x2-x1)^2 + (y2-y1)^2

D = √(-5-(-1))^2 + (-2-(-4))^2

D = √(-4)^2 + (2)^2

D = √(16 + 4)

D = √20

D = 4.47 units

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