Mathematics High School

y - 0.8x = 0.5
5y - 2.5 = 4x
*Substitution

Answers

Answer 1

Answer:

y =1.6 x

Step-by-step explanation:

hope this is right!!!

Answer 2

Answer:

y=0.5+0.8x

Step-by-step explanation:

solve for the first variable in one of the equations and then substitute the result into the other equation

Related Questions

Noah has 10 meters of rope. How many pieces of rope of length 1/2
meter can he cut from it?

Answers

Answer:

He can cut 20 1/2m peice of rope from the 10m rope

Step-by-step explanation:

divide

10 / .5 = 20

He can cut 20 pieces of rope because for every one meter he can make two pieces of rope. You can do 10*2=20 or 10 divided by 1/2=20

10 In 0.5 seconds, a projectile goes from 0 to 300 m/s. What is the acceleration of the projectile?

Answers

Answer: 600 m/s^2

Step-by-step explanation:

Use the first kinematic equation

[tex]V_f=V_i+at\\300=0+a(0.5)\\a=600m/s^2[/tex]

Chelsea shows her work in finding the solution to 4x−5=2+3(x−3). After checking her answer in the original equation, she found that it did not work. Where did she make a mistake?

Answers

quita los paréntesis: 4x-5=2+3(x-3) multiplica paréntesis X3, elimina el paréntesis: 4x-5=2+3x-9 calcule: 4x-5= -7+3x mueve los términos y te quedará así: 4x-3x-5=-7

agrupe los términos semejantes: x=-7+5

calcular la suma, y el resultado final sería: x= -2

Step-by-step explanation:

espero te sirva

what would you write for the answer of the square root of -49, because negatives don't really have square roots?[
tex]\sqrt-49[/tex]

Answers

Answer:

7i

Step-by-step explanation:

negative numbers have no real square roots. However there are "imaginary numbers which can be used as the sqrt of negative numbers

HELPPPP PLEAASE IM STUCK DUE IN 15 MINUTES

Answers

Answer:

x=15

Step-by-step explanation:

Factor: 2x^2-3x-20=0

Answers

Answer:

x=-5/2,4

Step-by-step explanation:

8 divded by 2 (2+2)= ?

Answers

Answer:

16

Step-by-step explanation:

8 / 2 (2+2)

8/2(4)

4(4)

16

PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEE HELP PLEASEEEEEEEEEEEE Caroline collected
3
1
4
bags of bottles to take to the recycling center.

1
3
of the bags are glass bottles
2
3
of the bags are plastic bottles
The recycling center only accepts plastic bottles. How many bags will the recycling center accept?

Answers

Answer:

2 7/12

Step-by-step explanation:

Anyone know? Please

Answers

Answer:

B

Step-by-step explanation:

X = 3

Y= 5

Shirts are 30% off. The original price of one shirt is $12. What is the total
cost, in dollars, of 2 shirts, at the sale price, including a 5% sales tax? *

Answers

2 shirts = $24
To find the sale price, convert 30% to a decimal by dividing by 100, = 0.30

24 x 0.30 = 7.20 discount.
24 - 7.20 = 16.80 for 2 shirts

Now we add the sales tax, 0.05 (converted like the sale percentage was)

16.80 x 0.05 = 0.84 tax
Add tax to the price of the shirts
16.80 + 0.84 = $17.64

please help me with this! (Multiple choice)m

Answers

12,
13^2-5^2=144, and the square root of 144 is 12

Order the numbers from least to greatest: -3, 5, -1, 0, 7

Answers

-3, -1, 0, 5, 7 ......... hope this helps

-3, -1, 0, 5, 7

hope that helped:)

Antonio ran 129 laps at the park. Alan ran 20% more than that. how many laps did Alan run

Answers

Answer:

154.8

Step-by-step explanation:

20% is equal to 20/100= 0.20. So, 0.20 multiplied by 129 will give you 20% of 129 which is 25.8. If Alan ran 20% more then you add 25.8 to 129 which gives you an answer of 154.8.

Equation: 20/100= 0.2

                0.2* 129= 25.8

                25.8+129= 154.8

Alan ran 154.8 laps.

The scool store is ng a sae and has owed the prices of all D 50:30 The price of any can be described D-030
5475
5375
5805

Answers

Answer:

jsjsjjsnsjsjsjjsjdjdjdjdj

Step-by-step explanation:

nxjsjjdndndjjdjdjxjjdjsjjdjxjzjjsjsjdjsjsjsjdjjssjjdjdjdjdjdjdjdjdjdjdjdjjxjdjdjdjdjdjdjdjjsjdjsjdnxj jxjsnjxjxj

PLEASE HELP I CANT FAIL! PLEASE HELP​

Answers

Answer:

send me link

Step-by-step explanation:

i need link to help

Answer:

I wrote answers to what I can see below. I'm happy to walk you through the rest of the problem if you can write out the rest in a comment, or LMK if you post a new pic/question.

Step-by-step explanation:

Step 1 answers:

What do you want to know: How many bicycles, how many unicyles?

What do you know?

A bicycle has 1 seat and 2 wheels

a unicycle has 1 seat and 1 wheel

there are a total of 18 seats and 28 wheels

Step 2 answers:

let b = number of bicycles

let u = number of unicycles

The nth term of a sequence is 3n²-1

The nth term of a different sequence is 30–n²

Find the only number that is in both of these sequences.

Answers

Answer: The number is 26.

Step-by-step explanation:

We know that:

The nth term of a sequence is 3n²-1

The nth term of a different sequence is 30–n²

We want to find a number that belongs to both sequences (it is not necessarily for the same value of n) then we can use n in one term (first one), and m in the other (second one), such that n and m must be integer numbers.

we get:

3n²- 1 =  30–m²

Notice that as n increases, the terms of the first sequence also increase.

And as n increases, the terms of the second sequence decrease.

One way to solve this, is to give different values to m (m = 1, m = 2, etc) and see if we can find an integer value for n.

if m = 1, then:

3n²- 1 =  30–1²

3n²- 1 = 29

3n² = 30

n² = 30/3 = 10

n² = 10

There is no integer n such that n² = 10

now let's try with m = 2, then:

3n²- 1 =  30–2² = 30 - 4

3n²- 1 = 26

3n² = 26 + 1 = 27

n² = 27/3 = 9

n² = 9

n = √9 = 3

So here we have m = 2, and n = 3, both integers as we wanted, so we just found the term that belongs to both sequences.

the number is:

3*(3)² - 1 = 26

30 - 2² = 26

The number that belongs to both sequences is 26.

The mass of a package sent through the mail is 3 kilograms what is the mass of the package in grams? Plz halp GAHAAHAHHAH

Answers

Answer:

3000 grams

Step-by-step explanation:

convert 3 Kg to G

Find an exponential function that passes through (2, 16) and (6, 256) with an asymptote
y=0.

Answers

Answer:she's a freshmen leave her alone anime girl before senpai comes for ya >_<

Step-by-step explanation:

Evaluate the expression when y= 7 and x = 9.
x + 4y

Answers

Answer:

  [1]    9x - 4y = 7

  [2]    x - 4y = -17

 [2]    x = 4y - 17

// Plug this in for variable  x  in equation [1]

  [1]    9•(4y-17) - 4y = 7

  [1]    32y = 160

// Solve equation [1] for the variable  y  

  [1]    32y = 160

  [1]    y = 5

// By now we know this much :

   x = 4y-17

   y = 5

// Use the  y  value to solve for  x  

   x = 4(5)-17 = 3

Step-by-step explanation:

Answer:

9+4(7)

Step-by-step explanation:

Start by replaceing y with 7

Do the same with x

ecuaciones simulaciones el método de reducción x+y=6 x-y=2​

Answers

The answers are X = 4, y = 2

Find the value of n that makes equation true.
5n =20
n + 5 = 10
2n = 3
n + 5 = 13

Answers

Answer:

5(4) = 20

5 + 5 = 10

2(1.5) = 3

8 + 5 = 13

Step-by-step explanation:

if you could show the steps that would be great​

Answers

Answer:

24x + 8

Step-by-step explanation:

4 + 16 - 12(1 + 2x)

Solve

Show steps

__________________

We have a dilemma here, there is a variable and constant numbers in this equation. No fear, this is when like terms comes into play, where you can only combine two numbers that have the same ending, whether it be variables, exponents, e.t.c.

Distribute :

4 + 16 - 12(1 + 2x)

4 + 16 - (12(1) + 12(2x))

4 + 16 - 12 + 24x

Use PEMDAS (Add left to right) :

4 + 16 - 12 + 24x

20 - 12 + 24x

8 + 24x

24x + 8

8-24x is your answer

Step-by-step explanation:

4+16-12(1+2x)

20-12-24x

8-24x

WHAT WOULD THIS BEEEE!??

Answers

Answer:

Angle 4 = 99 degrees

Step-by-step explanation:

Vertical Angles add up to 180

180-81= 99

HELP PLS NOW I WILL GIVE BRAINLIEST

Answers

Answer:

21

Step-by-step explanation:

Answer:

21

Step-by-step explanation:

I just solved

Winner gets a thanks and brainliest

Answers

Answer:

7/17

Step-by-step explanation:

8/17 + 2/17 = 10/17

17/17 - 10/17 = 7/17

In a sale all the prices are reduced by 30%. Calculate the sale price of the following items
a bike that cost £250
b. a pair of gloves that cost £3.20

Answers

Answer:

A: 26.89

B: 0.96

Step-by-step explanation:

70 percent of 250 is 26.89. 70 percent out of 3.20 is 0.96.

Answer in fraction form. Simplify if needed. 89 + (-23)

Answers

33/50. Truly Sorry if I’m wrong <333

You had 100$ in your bank account and deposited (put in) 10.50 more each week. How long would it take to have $200 in the bank?

Answers

Answer:

9.523

Step-by-step explanation:

Claire buys a computer that is on sale for 25% off the original price. The original price is $185 more than the sale price. What is
the original price of the computer?

Answers

Answer:

$740

Step-by-step explanation:

which of the following is a correct sine ratio for the figure? ​

Answers

5/13.....so D because sine is opposite over hypotenuse
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