Mathematics High School

I just started this new chapter in math, can somebody teach me how to solve this?

I Just Started This New Chapter In Math, Can Somebody Teach Me How To Solve This?

Answers

Answer 1

Answer: (-15, 3)

Let's solve your system by substitution.

x+5y=0;3y+2x=−21

Rewrite equations:

x+5y=0;2x+3y=−21

Step: Solvex+5y=0for x:

x+5y=0

x+5y+−5y=0+−5y(Add -5y to both sides)

x=−5y

Step: Substitute−5yforxin2x+3y=−21:

2x+3y=−21

2−5y+3y=−21

−7y=−21(Simplify both sides of the equation)

−7y

−7

=

−21

−7

(Divide both sides by -7)

y=3

Step: Substitute3foryinx=−5y:

x=−5y

x=(−5)(3)

x=−15(Simplify both sides of the equation)

Answer:

x=−15 and y=3

Related Questions

Solve the absolute value equation:
|x| -7=-3

Answers

Divide by -7. This gives you |x|=the answer. Then split it into two equations like
x= the answer but positive
x= the answer but negative
Then solve both of your equations for x to get the two answers.

Answer:

Step-by-step explanation:

-3+7=4

x=4

Question 23 of 25
What is the value of x in the diagram below?
49
IN
14
2
A. 6
B. 9
C. 8
D. 7
HELP ASAPPPPPP

Answers

Answer: D

Step-by-step explanation:

because 7x7= 49

Kip took out a loan for $750. He earned $60 in interest and his interest
rate was 4%. How long did he take to repay the loan?
1 year
2 years
2.5 years
3 years

Answers

9514 1404 393

Answer:

  (b)  2 years

Step-by-step explanation:

The interest formula is ...

  I = Prt . . . . interest rate r on principal P for t years

We can fill in the known values and solve for t.

  60 = 750·0.04·t

  60/30 = t = 2

The loan was repaid in 2 years.

A passenger train travels between two
cities at a constant speed. After 6 hours,
it has traveled 450 miles. After 9 hours, it
has traveled 675 miles. Which equation
shows the relationship between the
distance d in miles and the time t in hours?

Answers

Answer:

The train travels 75 mph.

Step-by-step explanation:

Hope this helps!

Answer:

(75, 1)

Step-by-step explanation:

One way we can figure out how fast the train goes, is bylooking at what we have. We know that the train travels 450 miles in 6 hours. When we divide, we get 75. So, we know that the train is going at 75 miles per hour. We can check our work by looking at the second relationship on there. When 675 is divided by 9, we get 75. So for every hour, the train travels 75 miles.

I hope that this helps you out :)

what is the solution
y=-4x+20 y=2x-22

Answers

Answer: x=7 y=-8

Step-by-step explanation:

Help! I don't know the meaning of life.

Answers

Keep ya head up king
the condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death (dictionary )

35,651,000,000 in to scientific notation

Answers

3.5651 × 10 to the tenth power

image down below thx

Answers

Answer: I thinks its B

Step-by-step explanation:

The answer is b
As 66/6 is 11
And the sign doesn’t change


Two angles are complementary. The measure of angle W is four times the
measure of angle N plus 10 degrees. What is the measure of angle N?

Answers

W=4N+10
N+4N+10=90
5N=80
N=80/5=16

On a coordinate plane, a line with a 90-degree angle crosses the y-axis at (0, 1), the x-axis at (1, 0), turns at (3, negative 2), and crosses the x-axis at (5, 0). What is the lowest value of the range of the function shown on the graph?

Answers

Answer:

-2

Step-by-step explanation:

Answer:

THE ANSWER IS B) -2

Step-by-step explanation:

ON EDGE 2021

what is the disadvantage and advantage​

Answers

Answer:

An advatage is that he has a scholorship to pay most of his college or school, but a disadvantage is that he will need to pay back his student loan.

Step-by-step explanation:

hope this helps :)

Answer:

Step-by-step explanation:

One advantage would be with a student loan he could probably get more money than a scholarship however the disadvantage is he would eventually have to pay that money back in the future. A scholarship would be free money given by a college but he would receive it in small amounts.

What is the classification for this polynomial? 5 Click on the correct answer monomial binomial trinomial​

Answers

where is the polynomial?
u can reply to my answer and i’ll help.

The value of a baseball​ player's rookie card began to increase once the player retired. When he retired in 1997 his card was worth ​$4.51 The value has increased by ​$1.02 each year since then. Express the relationship relating the value of the card y in dollars and the number of years x the player has been in retirement with an equation. Is the relationship between x and y​ proportional? What was the value of the card in ​2008?

Answers

Step-by-step explanation:

When he retired in 1997 his card was worth ​$4.51 The value has increased by ​$1.02 each year since then.

Express the relationship relating the value of the card y in dollars and the number of years x

y = $1.02 x + $4.51

Is the relationship between x and y​ proportional?

Yes. This is because as  x increases, the value of y also increases.

What was the value of the card in ​2008?

Number of years from 1997 to 2008 = x = 11

y = $1.02 x + $4.51

y = $1.02 (11) + $4.51

y = $ 11.22  + $4.51

y = $ 15.73

Which expression is equivalent to (8m + 6) + (3m - 2) ?

Answers

Answer:

(11m-4)

Step-by-step explanation:

8m+3m=11m

6-2=4

The answer to the question is 11m+4

c(4+3c)-0.75(c+3) please answer

Answers

I think it’s 6.25c - 2.25

Have a wonderful day! :)

24 is 31.25% of what number? Prove your answer in the show your workbox.
Pls explain it I'm giving brainlienesss

Answers

Answer:

76.8

Step-by-step explanation:

1. We assume, that the number 31.25 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 31.25, so we can write it down as 100%=31.25.

4. We know, that x% equals 24 of the output value, so we can write it down as x%=24.

5. Now we have two simple equations:

1) 100%=31.25

2) x%=24

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=31.25/24

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 24 is what percent of 31.25

100%/x%=31.25/24

(100/x)*x=(31.25/24)*x       - we multiply both sides of the equation by x

100=1.3020833333333*x       - we divide both sides of the equation by (1.3020833333333) to get x

100/1.3020833333333=x

76.8=x

x=76.8

now we have:

24 is 76.8% of 31.25

Answer:

76.8

Step-by-step explanation:

If x is a rational number and y-2/3

which statement describes the sum of x and y?

Answers

Answer:

to be honest I dont know I'm not that good at math....

Answer:

The answer is (A) The sum of x and y is a rational number.

Which of the following is NOT a solution for the inequality below? Please look at the picture

Answers

Hello Vanessa. I will be contacting your school for cheating.

someone please solve

Answers

Answer:

B

Step-by-step explanation:

Radius is half of diameter so r is 36

[tex]4/3\pi r^3[/tex] is volume of sphere

using 3.14 as pi you get 195,333.12 cubic cm

ill mark brainlist plss help

Answers

Answer:

9:1

Step-by-step explanation:

Divide both the numerator and denominator by the GCD

81 ÷ 9

9 ÷ 9

Reduced fraction:

9:1

Therefore, 81/9 simplified to lowest terms is 9/1.

Alright have posted the next question!

Answers

the answer to this is 4

Answer:

Angle 4 is the answer

Step-by-step explanation:

Vertical angles are angles opposite each other.

Therefore, angle 2 is vertical to angle 4.

hope this helps and is right :)

p.s. i really need brainliest

will mark BRAINLIEST!! show work
​

Answers

Answer:

d. x+9

Step-by-step explanation:

i hope this helps :)

Multiply each equation by a number that produces opposite coefficients for x or y 1/3x -2/3 y=7

Answers

Answer:

Attached

Step-by-step explanation:

How pure is 16-karat gold?

Answers

Answer:

here

Step-by-step explanation:

16 karat gold is 16 parts gold to 8 parts other material for a pure gold percentage of 67%.

Answer:

About 67% because karats are on a scale of 1-24 with 24 being pure gold,

so 16/24.

Michelle’s mom is letting her paint her room pink. What formula would she use to figure out how much paint she needs.

Answers

There’s no picture or anything so try again

Congruent Triangles will mark brainiest with thorough explanation.

AAS
SAS
ASA
Can't Determine

Answers

ASA

Angle-Side-Angle

AAS is the same but the order in different.

SAS is a no because there are no two S.

Can't determine bah! You can determine.

PLEASE BRAINLIEST

Answer:

The markings are different.

SAS and ASA would work, as you can count the sides and angles respectively, however, the markings are different, so I am not sure.

Actually I was wrong. Please give the other person credit.

answer asap! will give brainliest, question in pic!

Answers

Answer:

Im 95% sure that it is most likely the first one.

Step-by-step explanation:

The radius of Circle A is 6 mm. The radius of Circle B is 4 mm greater than the radius of Circle A. The radius of Circle C is 2 mm greater than the radius of Circle B. The radius of Circle D is 3 mm less than the radius of Circle C. What is the area of each​ circle? How many times greater than the area of Circle A is the area of Circle D​

Answers

Answer:

Area of circle A =113.14 mm²

Area of circle b = 314.29 mm²

Area of circle C = 452.57 mm²

Area of circle A = 254.57 mm²

2.25 times

Step-by-step explanation:

Area of a circle = nr²

where n = 22/7

r = radius

Circle A's radius = 6mm

Circle B's radius = 6mm + 4mm = 10mm

Circle C's radius = 10mm + 2mm = 12mm

Circle D's radius = 12mm - 3mm = 9mm

Area of circle A = (22/7) x 6² = 113.14 mm²

Area of circle b = (22/7) x 10² = 314.29 mm²

Area of circle C = (22/7) x 12² = 452.57 mm²

Area of circle A = (22/7) x 9² = 254.57 mm²

Number of times the area of circle D is greater than that circle A = Area of circle D / Area of circle A

254.57 mm² / 113.14 mm² = 2.25 times

Please helpppp :< here is 25 points

Answers

Answer:

function b

Step-by-step explanation:

When its asking for which function has a greater rate of change its asking for which slope has a greater value

the slope is calculated by change in y over change in x

for function a, as y goes up 2 x goes up 1

so the slope ( rate of change) is 2/1

for function b is y goes up 3 x goes up 1

so the slope (rate of change) is 3/1

3/1 is greater than 2/1 so function b has a greater rate of change

The box shown has a volume of 8 cubic inches.
image
If it is a cube, how long does each side measure?

Answers

Answer:

The answer is 2

Step-by-step explanation:

If we use the formula for volume LWH=V. We also take in the fact that a cube has the same measure on every side. and we input 2 for L , W , and H

Which is 2*2*2=8

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