Mathematics High School

Solve the system of equations by substitution. Show your work in the sketch and write your answer as an ordered pair.

There are 2 sketches in case you need more room.



`-3x+y=-2`

`y=4x`

Answers

Answer 1

Let's solve your system by substitution.

−3x+y=−2;y=4x

Rewrite equations:

y=4x;−3x+y=−2

Step: Solvey=4xfor y:

y=4x

Step: Substitute4xforyin−3x+y=−2:

−3x+y=−2

−3x+4x=−2

x=−2(Simplify both sides of the equation)

Step: Substitute−2forxiny=4x:

y=4x

y=(4)(−2)

y=−8(Simplify both sides of the equation)

Answer:

x=−2 and y=−8

Related Questions

What is the determinant of H=

Answers

Answer:

The answer is -7

Step-by-step explanation:

I took the test! Hope this helps <3

A length of rope is 6 meters long. How many 3/4 meter pieces can be cut from the length of the rope

Answers

Answer:

Step-by-step explanation:

[tex]\frac{6}{\frac{3}{4}}\\ \\ 6\left(\frac{4}{3}\right)\\ \\ 8\ pieces[/tex]

anyone can do this please if you can do all of it of you can I'm really bad at math​

Answers

Im Gonna Do 14 And 15.

14:
3/4 (9/12) + 1/3 (4/12) = 13/12
4/5 (16/20) - 1/4 (5/20) = 11/20

15:
-15 < -6
-31 < -19
-5 < 20
-21 < -15
0 < 22
-57 < -26
-71 < -10
3 < 21
-124 < 30
-43 < 18

Hope This Helps!

Sketch graph for y=x^2+x-12

Answers

Answer:

graph your welcome :)

Step-by-step explanation:

hope this helps! try using the app Desmos if you have difficulty drawing graphs!

You order a 119 pound couch suppose you use 1 day shipping instead of 3 to 5 day shipping how much more will you pay

Answers

119 + 1 + 3 + 5 =            add that if i am wrong sorry but have  a nice day <3

Step-by-step explanation:

Alycia has $10 to use for some new school supplies. She wants to buy a
binder for $2.79, a package of markers for $1.25 and 2 packs of ink pens for
$ 1.96 each. How much change should she get? *

Answers

Her change will be $2.04

PLEASE HELP FAST - THIS IS 40 PERCENT OF MY GRADE- I WILL MARK BRAINLY

Answers

Answer:

theres nothing there

...

Step-by-step explanation:

Answer:

???????????????????????

Step-by-step explanation:

?????????????????????????????????????????????????????????????

can someone solve this question plzzzzzzz ill give brainliest

Answers

Answer:

17 to 24

25 to 32

Step-by-step explanation:

8-1=7

16-9=7

therefore it means we add 7 on the next number which is 17; to get 24,and also to the next number after 24 which is 25 to get 32

Answer: 17 to 24 then 25 and 32

Step-by-step explanation:

Seriously Stephanie u needed help with this? Anyways glad I can help.

Find the area of the base of a box of height 4cm and lateral surface area 120cm.sq if its length is twice its breadth.

Answers

Answer:

The area of the base of a box is 1800 cm².

Step-by-step explanation:

We have:

H: is the height = 4 cm

[tex]A_{l}[/tex]: is the lateral surface area = 120 cm

L = 2B                                                                

We can find the breadth of the base by using the lateral surface area and the height:

[tex] A_{l} = H*B [/tex]        

[tex] B = \frac{A}{H} = \frac{120 cm}{4 cm} = 30 cm [/tex]

Now, if the length is twice its breadth we have:

[tex] L = 2B = 2*30 cm = 60 cm [/tex]

Hence, the area of the base is:

[tex] A_{b} = B*L = 60 cm*30 cm = 1800 cm^{2} [/tex]

Therefore, the area of the base of a box is 1800 cm².

I hope it helps you!                                                        

PLZ HELP ME PLZZZ I WILL GIVE BRAINLIEST......I REALLY NEED THE ANSWERS.

Answers

Answer:

2,4,2,1.7

Step-by-step explanation:

100 PTS + BRAINLIEST PLEASE HELP

Answers

Answer:

Answer is 1/216.

Step-by-step explanation:

Answer:

b is the right answer

Step-by-step explanation:

Please help!! Question is above in the image

Answers

9514 1404 393

Answer:

  $503.85

Step-by-step explanation:

The amortization formula can help with this.

  A = P(r/12)/(1 -(1 +r/12)^(-n))

where P is the loan value, A is the monthly payment, r is the annual interest rate, and n is the number of monthly payments.

We want to find P. All of the other values are given.

  P = A(1 -(1 +r/12)^-n)/(r/12)

  P = 32.48(1 -1.012667^-18)/(0.012667) = 31.48·16.0054

  P ≈ 503.85

The equivalent cash price is about $503.85.

Help Pls!!! Will give brainliest

Answers

Answer:

a

Step-by-step explanation:

ill mark brainlist plss help

Answers

he is going to need 37.5 ounces I guess

Inscribed angles!!

Find A, B, and C

Answers

sum of all exterior angles equals to 360

sum of interior angles equal to 180

divide 360 by 122 to find b the rest you'll get it

as you go further in the question

Sally's dance school had 60 students last year. This year there are only 48 students enrolled. By
what percent did the enrollment decrease? Show all of your work to justify your answer.

Answers

Answer:

20%

Step-by-step explanation:

60-48=12

changed ÷ original x 100%

= 12 ÷ 60 x 100%

= 20%

Which expression is equivalent to (44)2 . (47) 2? A. 1 46 1 1 B. 43 C. 411 D. 430 ​

Answers

Answer:

67

Step-by-step explanation:

i dont know

what's the inequality for 15x + 21 ≥ 120​

Answers

X>= 6.6 is your answer

Find the area of the composite figure.

A) 22m
B) 26m
C) 30m
D) 34m

Answers

Answer:

C is the answer.

plz help me with this asap
81x^2 − 49y^2
Factorize each completely
1. y^2 − 1
2. x^2 − 2^2
3. x^2 − 4y^2
4. x^2 − 25b^2
5. 36 − 9m^2
6. 36a^2 − 169x^2

7. 81x^2 − 49y^2
8. 49r^2 − 16s^2
9. 144x^2 − 49
10. 64x^2 − 25
11. 81a^2 − 64b^2
12. 1 − 16x^2
13. 49x^2 − 1
14. (a + b)^2 − 2^2
15. (a − b)^2 − 1

Answers

Answer:

i will answer THIS.. just give me some time

how to solve problems on this website

Answers

Answer:

You go to whoever's question you wanna answer and it should say "add answer" and just type out your answer and solve it

Answer:

Theres a "add answer" just click on that and u will be able to add

Step-by-step explanation:

Im supposed to find angles for these, and I don't know on how to do that

Answers

Answer:

110

Step-by-step explanation:

They are equal to each other.

23x-5= 21x +5

2x = 10

x = 5

21(5) +5 = 110°

23(5) -5 = 110°

So it works. Angles are 110°

A collector bought 47 coins at auction, some bronze and some silver. The bronze coins cost him $ 14 each and the silver coins, $ 18 each. If in total he spent $ 750, how many bronze coins did he buy and how many silver?

(with the steps)

please help me, it's for an exam

Answers

24 bronze coins and 23 silver coins

B= bronze coins S = silver coins
$14xB + $18 x S =$750
B + S = 47 total coins
Get in terms of S=47-B by subtracting B from each side, then replace the S in the first equation with this so that:
14xB+18x(47-B)=750
14B+846-18B=750
Subtract the 846 and combine the abs
-4B=-96 then divide the -4 on both sides
To get B=24 then 47-24=23=S

9x+ 1 =x+ 9
the solution is x=

Answers

Step-by-step explanation:

9x + 1 = x + 9

9x - x = 9 - 1

8x = 8

x = 1

X is 1 because we can minus x fro. Both sides and 1 from both sides to get 8x equal to 8

What is the value of the expression shown below? 7 + (2 + 6) 2 ÷ 4 ⋅ 1 over 2 whole to the power of 4 (5 points)

Answers

Answer:

18

Step-by-step explanation:

Answer: The correct answer is 8

Step-by-step explanation: I'm too lazy to add an explanation :/

solve it...........!!!!​

Answers

Answer:

I think it is correct and is 1 and 2

Step-by-step explanation:

5×4^(x+1)-16^x=64

0=64+16^x-5×4¹×4^x

0=(4^x)²-2×4^x×10+10²-10²+64

0=(4^x-10)²-36

(4^x-10)²=36

4^x-10=√36

4^x=+-6+10

when positive

4^x=4²

:.x=2

when negative

4^x=4

:.x=1

:.x=1,2 answer.

Complete the ordered pairs below so they satisfy the equation,
y= -2x + 6
Complete the following ordered pairs.
(0,_)
(6,_)
(_,20)
(Simplify your answers. Type an integer or a fraction.)

Answers

(0,6)
(6,-6)
(-7,20)

i believe !

pls help me! 15 points

Answers

Answer:

1.414

Step-by-step explanation:

Gavyn and Alex win some money and share it into the ratio 1:4. Gavyn gets £6. How much does Alex get?

Answers

He gets 1.5 of it hope that help

Simplify the expression (3a^4) (-6a^3) 

Answers

Answer:

18a^7

Step-by-step explanation:

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