please help and show work
y=-8x
y=-4-10x

Answers

Answer 1
{ y=-8x
{ y=-4-10x

Substitution Method:

-8x=-4-10x
x=-2

y=-8(-2)
y=16

(x,y) = (-2,16)

Check solution
{ 16=-8(-2)
{ 16=-4-10(-2)

{ 16=16
{ 16=16

Elimination Method:

{ 8x+y=0
{ 10x-y=-4

{ 8x+y=0
{ -10x-y=4

-2x=4
x=-2

8(-2)+y=0
y=16

(x,y) = (-2,16)

*For checking, its the same with the substitution method

Related Questions

If Jake's height from birth (measured in inches) can be modeled by the Linear Regression Equations y = 4.3x +19, with x representing his age in years after birth What does this slope mean in the context of the problem

Answers

His height. To explain, if he was a newborn his age, x, would be 0. That can be modeled by y=4.3(0)+19 and so y would equal 19. He was 19 inches as a newborn. When he turned 1, x changed to 1. This can be shown by y=4.3(1)+19 where his height, y, is now 23.3 inches. The 19 stays constant because he was 19 inches as a newborn and every year that he grows older he grows 4.3 inches. Hope this helps!

Determine the measure of angle A, B, and C in triangle ABC. If m∠A=(x-10)°,m∠B=(2x-50)°,and m∠C=x°

Answers

Answer:

m∠A = 50°

m∠B = 70°

m∠C = 60°

Step-by-step explanation:

Determine the measure of angle A, B, and C in triangle ABC. If m∠A=(x-10)°,m∠B=(2x-50)°,and m∠C=x°

In a Triangle, the sum of the interior angles of a triangle = 180°

Step 1

We solve for x

Hence:

m∠A + m∠B + m∠C= 180°

(x-10)°+ (2x-50)°+ x° = 180°

x - 10 + 2x - 50 + x = 180°

4x - 60 = 180°

4x = 180° + 60°

4x = 240°

x = 240°/4

x = 60°

Step 2

Solving for each measure

x = 60°

m∠A=(x-10)°

= 60° - 10°

= 50°

m∠B=(2x-50)°

= 2(60)° - 50°

= 120° - 50°

= 70°

m∠C=x°

= 60°

Identify the sum of the interior angle measures of a convex octagon.
O 1080°
O 1260°
O 1620°
O 1440°

Answers

(n - 2)*180
Therefore, (8 - 2)*180
Which equals to 6(180) or 1080

Hope this helps! :)

The sum of the interior angle measures of a convex octagon is 1080. the correct option is A.

What is an octagon?

An octagon is an 8-gon, or polygon with eight sides, in geometry. The Schläfli symbol for a regular octagon is 8, and it can also be built as a nearly regular truncated square.

The interior angle will be calculated as,

Angle = (n - 2) x 180

Angle = ( 8 - 2 ) x 180

Angle = 1080

Therefore, the sum of the interior angle measures of a convex octagon is 1080. the correct option is A.

To know more about an octagon follow

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I paid $42 for six hot chocolate bombs what is the unit rate price for one item 

Answers

Answer:

$7

Step-by-step explanation:

Terri borrows $3500 at an interest rate of 3% and plans on paying her loan over 4 years. Using the interest formula, what is the total amount Terri will have to repay on both the loan and the interest?

Answers

3920

Step-by-step explanation:

3500×.03=?×4. 3500÷?=?

HURRY UP ITS TIMED
Which graph shows three points that represent equivalent ratios?
Correct answer gets a brainliest

Answers

It will be B.

Hope this helps!

Answer:

A.

Step-by-step explanation:

The points are at 3,1 which 3/1=3, 6,2, which 6/2=3/1, and 9,3, which 9/3=3/1.

(hope this helps!)

The cylinder shown here has a height of 7 cm and a radius of 4 cm

How many cubic centimeters of fluid can fill this cylinder?

Answers

Answer: 175.9 (1decimil place)

Step-by-step explanation: Volume of cylinder= πr2h

V= π(4)x2x7= 175.9291886 (175.9 1dp) cm cubed.

I need this answer ASAP

Answers

Answer:

B) 40

Step-by-step explanation:

2:10    2 out of 10

40:200      40 out of 200

A number is equal to 3 times a smaller number. Also, the sum of the smaller number and 4 is the larger number. The
situation is graphed on the coordinate plane below, where x represents the smaller number and y represents the
larger number


Answers

Answer:

The answer is that in my case y (the smaller number) is 2 and x (the bigger number) is 6

Step-by-step explanation:

The equations are x=3*y and y+4=x. This makes y=2 and x=6.

ABCD ~ FECG

Y=
Please helpp

Answers

Answer:  y = 8

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

Explanation:

Notice how EC = 5 doubles to BC = 5+5 = 10

So the larger quadrilateral (ABCD) has side lengths that are exactly twice as long compared to the smaller quadrilateral's sides. We can say the scale factor is 2.

This must mean that side FG = 4 doubles to 4*2 = 8, which is the length of side AD. So that's how we get y = 8.

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

Extra info:

x = 12 because side EF = 6 doubles to this value. w = 120 because the corresponding angles of ABCD pair up with FECG, so we see that angle D = angle G = 120.z = 80 because we solve F+E+C+G = 360 to find that F = 80, which leads to angle A = 80 as well.

Length of AD, y = 8

What are similar quadrilateral?

Two quadrilaterals are similar if their corresponding angles are equal and also their corresponding sides must be proportional.

Given,

EC = 5

FG = 4

BE = 5

AD = y

ABCD ~ FECG,

then ratio of the corresponding sides will be equal.

BC/AD = EC/FG

(BE + EC)/AD = EC/FG

(5 + 5)/y = 5/4

10/y = 5/4

5y = 40

y = 40/5

y = 8.

Hence, 8 is value of y that is length of AD.

Learn more about similar quadrilaterals here:

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A car travels 30 1/5 miles in 2/3 of an hour.What is the average speed in miles per hour of the car

[tex]Your answer=[/tex]

Answers

I dont know? You can maybe ask somone on branly

Answer:

The speed of car is 45.3 miles per hour.

why doesn't an elephant smoke?
its the bottom columns i need help with i just need like the words....

Answers

Answer:

i tried looking it up but i just got this far

Step-by-step explanation:


What is an equation in point-slope form of the line that passes through the point (6,-2) and has a slope of 3?

Answers

Answer:

y+2=3(x-6)

Step-by-step explanation:

y-y1=m(x-x1)

y-(-2)=3(x-6)

y+2=3(x-6)

what is a decimal that is equivalent to the fraction 93/100 ​

Answers

decimal equivalent of fraction 93/100 is 0.93
Answer=0.93 :)))))())))

Please help asap ll give brainliest!!!!!

Question 1
Evaluate

2y+8fory=−2


------------------------------------------------------------------------------------------------------------------------
Question 2
Evaluate

−5x+6forx=−8


-----------------------------------------------------------------------------------------------------------------------
Question 3
Evaluate

3r−2s+12forr=10ands=4


--------------------------------------------------------------------------------------------------------------------
Question 4
Evaluate

6y−4x−9forx=6andy=−3


-----------------------------------------------------------------------------------------------------------------------------
Question 5
Translate the expression

a number t decreased by 13


------------------------------------------------------------------------------------------------------------------------------
Question 6
Translate the expression

six times a number y

Group of answer choices

6y

6-y

6+y

6/y

---------------------------------------------------------------------------------------------------------------------------
Question 7
Translate the expression

three more than four times a number p

Group of answer choices

4p+3

3(4+p)

3p+4

(3+4)p

-------------------------------------------------------------------------------------------------------------------
Question 8
Translate the expression

two times a number v decreased by 7

Group of answer choices

2(v-7)

2v-7

2(7-v)

(2v)-7

----------------------------------------------------------------------------------------------------------------------
Question 9
Translate the expression

six times the sum of seven and a number x

Group of answer choices

6x+7

6(7+x)

7+6+x

6(7)+x



----------------------------------------------------------------------------------------------------------------------
Question 11
Simplify the expression

-8b-10b+7

-----------------------------------------------------------------
Question 12
Simplify the expression

13 + 7t -9


---------------------------------------------------------------------------------------
Question 13
Simplify the expression (remember to write the variables in alphabetical order)

-9n-8m+8-3n+6m-2


Flag this Question
Question 141 pts
Simplify the expression

-5x+3y+9x+7


---------------------------------------------------------------------------------------------------------------------
Question 15
Bonus Question (3 pts extra credit)

Simplify and evaluate the expression for x=2 and y=-4

-2y+4x-3y+6x-12

Answers

Answer:

Step-by-step explanation:

A lot to answer here, so lets get straight into it.

Question 1 :

2y + 8 for y = -2

We just need to substitute :

2(-2) + 8

-4 + 8

4

Question 2 :

-5x + 6 for x = -8

Substitute :

-5(-8) + 6

40 + 6

46

Question 3 :

3r - 2s + 12 for r = 10 and s = 4

Substitute :

3(10) - 2(4) + 12

30 - 8 + 12

22 + 12

34

Question 4 :

6y - 4x - 9 for x = 6 and y = -3

Substitute :

6(-3) - 4(6) - 9

-18 - 24 - 9

-42 - 9

-51

Question 5 :

A number t decreased by 13

t - 13

Question 6 :

Six times a number y

6y

Question 7 :

Three more than four times a number p

4p + 3

Question 8 :

Two times a number v decreased by 7

2v - 7

Question 9 :

Six times the sum of seven and a number x

6(7 + x)

Question 11 :

-8b - 10b + 7

-18b + 7

Question 12 :

13 + 7t - 9

13 - 9 + 7t

4 + 7t

Question 13 :

-9n - 8m + 8 - 3n + 6m - 2

-9n - 3n = -12n

-8m + 6m = -2m

8 - 2 = 6

-2m - 12n + 6

Question 141? :

-5x + 3y + 9x + 7

-5x + 9x = 4x

3y = 3y

7 = 7

4x + 3y = 7

Question 15 / Bonus :

-2y + 4x - 3y + 6x - 12 for x = 2 and y = -4

Substitute :

-2(-4) + 4(2) - 3(-4) + 6(2) - 12

8 + 8 + 12 + 12 - 12

16 + 12 + 12 - 12

28 + 12 - 12

40 - 12

28

1. Find the area of the rectangle whose dimensions are:
(i) length 24.5 m, breadth 18 m (ii) length
12.5 m, breadth = 8 dm.

Answers

Answer:

i. Area(A)=L×B

24.5m×18

441m²

4.25m + 7 + 6.75m - 11 =

Answers

Answer: 7

Step-by-step explanation:

4.25+6.75=11

11+7=18

18-11=7

Answer:

11m-4

Step-by-step explanation:

Add 4.25m and 6.75m= 11m

7+-11= -4

On a coordinate grid, point R is at (−6, 2) and point S is at (8, 2). The distance (in units) between points R and S is ______. (Input only whole numbers, such as 2.)

Answers

Answer:

Step-by-step explanation:

Difference of x-coordinates = -6-8 = -14

Difference of y-coordinates = 2-2 = 0

Distance = √((-14)^2+0^2) = 14

Evaluate 81.4 % of 58.81 km Give your answer rounded to 2 DP.

Answers

Answer:

47.87

.................

create an equation to match my polynomial

Answers

(10,-10) i think that’s what it would be

Tanya is n years old today. How old will she be in 5 years

Answers

Answer:

n+5

Step-by-step explanation:

Answer:

n + 5 or 5 + n

Step-by-step explanation:

add 5 to n, tanya's current age, to find how old she'll be in 5 years.

since the variable n is not defined, the answer cannot be simplified further than n + 5.

if n had been defined, you would be able to figure out her exact age after 5 years, which would be the fully simplified answer. for example, if n were to equal 10, then tanya would currently be 10 years old. by plugging in 10 for n in n + 5, you would figure out that in 5 years (aka 10 + 5) tanya would be 15.

i hope this helped! have a great day <3

Plz help me i just need the name..thankyou!

Answers

Answer:

You can try E, G, D, N, L, and F. I will help you if you have any questions on it, but I will give you a little hint that do the way I did. It will make it much more easy to understand it. Hope this helps, thank you :) !!

In the diagram below shows the cross section of a bridge with a semi circle hole. If the perimeter of the cross section is 24m. Calculate
A. the length PQ.
B. Area of the cross section ( π =22/7)​

Answers

I can’t answer that and I’m sorry
PQ=8m do you know the diameter of the semicircle

Find the sine of ∠E.

Answers

Answer:

solution

by using pythagorus theorem

h^2 =p^2 +b^2

10^2 = p^2 +under root 82 squaretherefore p is equal to

[tex]3 \sqrt{2} \\ [/tex]

sine E =p/h

=

[tex]3 \sqrt{2} \div 10[/tex]

hyp = 10
adj = √82

√82 ² + opp² = 10²

82 + opp² = 100

opp² = 100-82

opp = √18


Sin E = √18 / 10

E = 25.6°

Think About the Process Van purchased a DVD player on sale. The original
selling price was $175.90. The sale price was $149.62. What is the first step in
finding the percent markdown? Find the percent markdown.


much appreciated if helped :(

Answers

Answer:

14.940306992% or 15%

Step-by-step explanation:

To solve for percent or price markdown, you first have to find the difference between the original selling price and the sale price.

$ 175.90 - $ 149.62 = $26.28

Then, find the percentage that $26.28 is of the original selling price. You are decreasing the original by this much to get to the sale price.

$26.28 / $175.90

= 0.14940306992

Finally, multiply by 100 and round up to reach a percentage.

15%

pls help with this problem if u do thx <3

Answers

2 Answers: Choice B and Choice D

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

Work Shown:

c = price of coat before discount

0.33c = discount = amount you save

c - 0.33c = original price minus discount = final price

c - 0.33c = 1c - 0.33c = (1-0.33)c = 0.67c = final price

In short, c - 0.33c = 0.67c

They are two ways of expressing the same thing.

You can think of it like saying 100% - 33% = 67%

If you save 33%, then you still have to pay the remaining 67% of the original cost.

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

Example:

Let's say the coat is $100 before the discount

c = 100

0.33*c = 0.33*100 = 33 dollars is how much you save

c - 0.33c = 100 - 33 = 67 dollars is the final price

0.67c = 0.67*100 = 67 matches with the previous figure above

i give you brainline if you hep me its ez

Answers

Answer: 2 1/6

Step-by-step explanation:

13/6 simplified is 2 1/6

can someone help me with this problem im stuck..

Answers

9514 1404 393

Answer:

  100% is an integer multiple of 10%

Step-by-step explanation:

100% is not an integer multiple of 30%, so it is difficult to use 30% directly to determine the value of 100%. Dividing 30% by 3 to get 10% then gives you a value that can be multiplied by 10 to find 100%.

Can someone please give me the answer to this please:(

I will give the first person who answer it correct a brainliest

I need the answer ASAP!!!!!!!!

Answers

You didn't ask a question or put a picture on this

Factor b3 +b2 + b + 1.

Answers

Answer:

(b+1)(b²+1)

Step-by-step explanation:

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