Mathematics High School

y = 5x − 7 −3x − 2y = −12 solved by substitution please show the work too so i can understand

Answers

Answer 1

Answer:

y=3, x=2

Step-by-step explanation:

-3x-2(5x-7)=-12 (substitute y=5x-7)

simplify

{-13x+14=-12\}

isolate x for -13x +14=-12: x=2

for y=5x-7 substitute x=2

simplify y=3

sorry i know this is quite lenghty but i hope this helps :) have a nice day !!

Related Questions

Which numbers go in the red and blue box to make the same sum(ADDING INTEGERS)!!

Answers

Answer:

positive 3 and 7 in the red box and negative 6 and 4 in the blue box hope that helps

Matthew went to the store to buy some of the ingredients for Indian pudding for his mother. He bought cornmeal ($1.74), cinnamon ($2.10), milk ($2.95), and eggs ($1.52). How much did Matthew spend? How much change would Matthew receive if he gives the cashier a $20 bill?

Answers

Answer:

8.04 and he would have 11.96 left over

Step-by-step explanation:

Joseph built a model of a pyramid where
the base of the pyramid is a square.
If
the base has an area of 49 cm2,
what is the side length of the
base?

Answers

Answer:

[tex]7[/tex]

Step-by-step explanation:

[tex] \sqrt{49} = 7[/tex]

Determine the number of solutions of the system.
y = 2x - 1
y = -2x + 3

Answers

the answer to this is the system has no solution.

How many lines of symmetry does the figure have?

A. 0
B. 1
C. 2

Answers

Answer:

The answer is A, so zero.


True or False: Exponential growth and exponential decay graphs are always
functions

Answers

Answer:

true

Step-by-step explanation:

Answer: The answer is TRUE

ASAP plot the graph here arigato

Answers

Answer:

Its point A. Or 4,5 or -4,5

Step-by-step explanation:

The school that Rob goes to is selling tickets to a spring musical. On the first day of ticket sales the school sold 7 adult tickets and 4 child tickets for a total of $89. The school took in $119 on the second day by selling 7 adult tickets and 14 child tickets. Find the price of an adult ticket and the price of a child ticket.

Answers

Hint: create an equation. Ex. 7a + 4c = 89. If you need more help, let me know!

Could someone explain how to do this, I have no idea how...

Answers

Answer:

2a²

Step-by-step explanation:

Pair 'like' terms with 'like' terms, ie numbers go with numbers, and 'a's go with 'a's.

Lets deal with the top of the fraction first:

4ax3a³

Rearrange it so you have numbers beside numbers and 'a's beside 'a's:

(4x3)x(axa³)

12x(a⁴) (because nᵃxnᵇ=nᵃ⁺ᵇ)

12a⁴

Now, instead of (4ax3a³)/6a², we have 12a⁴/6a²

First divide the numbers: 12/6 =2

Now divide the 'a' parts: a⁴/a²=a² (because nᵃ/nᵇ=nᵃ⁻ᵇ)

Now we have 2a²

Please help nobody is helping me PLEASE

Answers

Answer:

8 ft. tall

Step-by-step explanation:

the measurement of the height of the 10 and then judging by the height of the middle half is 8 ft.

Please, please help. (no fake answers please)

Answers

Answer:

13

Step-by-step explanation:

plug each number in for each variable

(24(1/2) + 2(7)) / (1/4)(8)

simplify

(24/2 + 14) / (8/4)

simplify

12+14/2

simplify

26/2

simplify

13

Josiah invested $7,800 in an account paying an interest rate of 8 7/8% compounded
continuously. Faith invested $7,800 in an account paying an interest rate of 8 3/4%
compounded quarterly. After 9 years, how much more money would Josiah have in
his account than Faith, to the nearest dollar?

Answers

Answer:

$339

Step-by-step explanation:

Answer:

$339

Step-by-step explanation:

Is 3 a factor of 14t-20?

Yes

No

Answers

Answer:

No

Step-by-step explanation:

I dont really know

No, 3 is not a factor of 14t-20

There's an attachment. This is due in TWO minutes! I will award brainliest. Please answer soon!

Answers

Answer:

ultiply by 2 and then add 2

Step-by-step explanation:

....hi

What is the answer to this question

Answers

Answer:

C

Step-by-step explanation:

Quite simple. If x=4, the x+8, or 4+8= 12. 3x or 3*4 also happens to equal 12. Yw.

Answer:

c

Step-by-step explanation:

x + 8= 3x

if the answer is 4 then it would be 4 + 8 = 12 which makes sense. if you have a problem like this just put in what your trying to find and when the problem makes sense that's the solution.

Find the indicated term of each sequence by repeatedly multiplying the first term by the common ratio.
Enter your answer to 5 decimal places if necessary. Use a calculator.
-40, 20,-10, ...; 5th term
The 5th term of the sequence is

Answers

Answer: -2 1/2

Step-by-step explanation:

First term = a = -40

Common ratio = 2nd term / First term = 20 / -40 = -1/2

5th term = ar⁴

5th term = -40 × (-1/2)⁴

5th term = -40 × 1/16

5th term = -2 1/2

The graph shows the relationship between time and the number of soda bottles a machine can make. Use the points (5,80) and (8128) to find the number of soda bottles the machine can make each minute

Answers

Answer:

16

Step-by-step explanation:

not sure if you still need the answer since its been two weeks but 80 divide 5 you get 16 and 128 divide 8 you get 16.

HELPPP im confused :/

Answers

Answer:

D.

Step-by-step explanation:

The sides correspond with a favor of 1.5

12/8 = 1.5

7.5/5 = 1.5

3/2=1.5

find the length of IR using the special right triangles

Answers

Answer:

7

Step-by-step explanation:

This is a 30-60-90 triangle. The side that include the 60 degree angle and the 90 degree symbol side length is half of the hypotenuse. The hypotenuse is 14 so IR is 7.

54,675+33,548,000x+a=?

Answers

Answer:

33602675

Step-by-step explanation:

PLEASE HELP ASAP LIKE PLEASE

Answers

Answer:

40

Step-by-step explanation:

60-20=40

Bern has 60. Delhi has 20. Subtracting those =40

what is the answer please help me

Answers

i can’t see the entire question, but i’m going to go out on a limb and say it’s divide, y-value, x-value

Find the slope of the line
Y=1/4x+2

Answers

The slope is 1/4 and 2 is the y intercept

The slope is 1/4 and 2 is the y intercept

Step-by-step explanation:

PLSSSSSS HELPPPPPPP FAST WILL GIVE BRAINLIEST ITS IREADY!!!!!!!!!!! PLSSSSS HELPPPPPPPPPPPPPP

Answers

2 yellow paint, 6 blue paint

Answer:

put the blue paint to 6 and the yellow to 2

list five rational numbers between -1 and 0

Answers

-1/5 -2/5 -3/5 -4/5 -1/2

on monday two hundred thirty-four students went on a trip to the zoo. All five buses were filled and four students had to travel on cars. How many students were in each bus?

Answers

Answer: 46 students on each bus

Step-by-step explanation:

234-4=230

230/5=46

Kyle found that
31/97 = 0.3196. Without doing any computation, explain how we know

that Kyle is wrong.

I need the answer really quickly!!!

Answers

Answer:

The answer actually rounds to 0.3196, but the computation is so long, we just count it as 0.3196. The real answer would be 0.31958762886.

Step-by-step explanation:

Lin runs 12 laps around a track in 15 minutes.

A. How many minutes per lap is that?

B. How many laps per minute is that?

C. If Lin runs 20 laps at the same rate, how long does it take her

Answers

Answer:

it will take 25.2 minutes for Lin to run 21 laps

Step-by-step explanation: give crown plsplsplsplsplsplsplsplsplspls, also have a good day!

There is a bag with 50 popsicles inside. 5
are red, 15 are orange, 12 are blue, 8 are
yellow and 10 are purple. If you were to
grab one popsicle from the bag, what is
the probability that it is purple?

Answers

Answer:

25%

Step-by-step explanation:

We know that there are ten purple popsicles. Together without the purple popsicles, there are 40 popsicles in total. Therefore there is a 10/40 chance to get purple. We need to turn this into a percentage so we do (10 / 40) x 100. This would equal to 25%, therefore, there is a 25% probability to get a purple popsicle.

Can someone answer this question i am having an issue to how to figure it out

Answers

Answer:

explanation below

Step-by-step explanation:

f(x) = 3x + 2

f(8) : replace x with 8    f(8) = 3 * 8 + 2 = 26

g(x) = 5x

g(a+2) : replace x with a+2    g(a+2) = 5 (a+2) or 5a + 10

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