Mathematics High School

solve each system by substitution. y=2x-1 3x+8y=11

Answers

Answer 1

X=1 y=1

Answer:

y=2x-1 ---(1)

3x+8y=11 ---(2)

sub (1) into (2)

3x+8(2x-1)=11

3x+16x-8=11

19x=19

X= 1

sub X= 1 into (1)

y= 2(1)-1

y=1

Related Questions

there are 450 student in a school. if75% of them are girls, how many girls and boys are there

Answers

112 are male and 338 are female

Which expression is a sum of a number and a product

Answers

all i can see is a black screen? try uploading again or put it in the comments :D

20% of _____ is 11

_____% of 60 is 21

(fill the blank)
(they're both seperate questions)

Answers

the first one is 55 and then the second one would be 35%

The first is 55, the second is 35%

Percent (as a decimal) x whole = part
0.2 x w = 11
w = 11/0.2
w = 55

p x 60 = 21
60p = 21
p = 0.35 = 35%

Let me know if you have questions

help me asap brainliest for correct answer

Answers

I’m pretty sure it’s the 3rd one

NEED HELP ASAP Wayne bought some toy cars, c, and some baseball cards, b. Each toy car cost $3 and each baseball card cost $2. Which expression represents the total cost of Wayne's purchase?
A.
3 + b + 2 + c
B.
3b + 2c
C.
3 × 2 + b × c
D.
3c + 2b

Answers

Answer:

Hey mate.....

Step-by-step explanation:

This is ur answer.....

D. 3c + 2b

Hope it helps!

Mark me brainliest pls.....

Follow me!!! :)

How much interest will you earn by leaving $500 in a savings account for 3 years with an interest rate of 1.5%?

Answers

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

: 522.5$

First calculate yearly interest

500 x 0.015 = 7.5

7.5 x 3(for 3 years) = 22.5

Then add them together!

500 + 22.5 = 522.5

<!> ! <!>

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The measures of the three angles of a triangle are given by x+4,x, and 2x. What is the value of x

Answers

Answer:

x = 44°

Step-by-step explanation:

The sum of all the interior angles of a triangle = 180°

so:

(x+4) + x + 2x = 180°

reducing:

4x + 4° = 180°

4x = 176°

x = 44°

4cos(x) = 3
solve this

Answers

Answer:

41.4 degrees

Step-by-step explanation:

Find cos x by dividing both sides of this equation by 4:

cos x = 3/4 = 0.75

Using a calculator's inverse cosine function, find x:

arccos 0.75 = 0.723 radian, or

0.723 rad 180 deg

--------------- * ------------- = 41.4 degrees

1 pi rad

YOU WILL GET BRAINLIEST. A cone is circumscribed by a hemisphere radius of which is equal to the height of the cone. Find the ratio of the volume of the cone to the volume of the hemisphere

Answers

Answer: 1:2

Step-by-step explanation: plz mark me brainliest

I need help with a achieve 3000 a presidents jobs

Answers

Answer:

Answer is in the photo. I can only upload it to a file hosting service. link below!

is.gd/qKzpBU

HURRYYYY PLEASEEEE

find the value of x.

Answers

x = 31

180 = 3x + 25 + 2x
180 = 5x + 25
-25. -25
155 = 5x
x = 31

Answer:

x=31

Step-by-step explanation:

Hello there!

the shown angles are supplementary meaning that the sum of the two is 180

so we create an equation

180=3x+25+2x

step 1 combine like terms

3x+2x

now we have

180=25+5x

step 2 subtract 25 from each side

180-25=155

now we have

155=5x

step 3 divide each side by 5

155/5=31

5x/5=x

we're left with x=31

~TheMathWiz

which graph represents the solution to 7x < 21 or 6x -9 > 21

Answers

Answer:

There is no solution, though the lines are confirmed as dashed with the shaded area being on the outer sides.

Step-by-step explanation:

above

A trampoline park costs $12 for the first hour and $6 for each additional hour. Flynn pays $30 at the trampoline park. Select the equation that represents the given situation and find the number of additional hours Flynn stays at the trampoline park after the first hour.
A. 12x + 6 = 30; 3 hours
B. 6x + 12 = 30; 3 hours
C. 6x + 12 = 30; 2 hours
D. 12x + 6 = 30; 2 hours

Answers

Answer is B. 12 dollers for 'admission' and then you have 6 per hour of time

The equation that represents the given situation is 12 + 6x = 30.

The number of additional hours is 3.

Option B is the correct answer.

What is an equation?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

2x + 3 = 9 is an equation.

We have,

A trampoline park costs $12 for the first hour and $6 for each additional hour.

Amount paid at the park = $30

Now,

12 + 6x = 30

x is the number of hours.

Solve for x.

12 + 6x = 30

6x = 30 - 12

6x = 18

x = 3

Thus,

The equation is 12 + 6x = 30.

The number of hours is 3.

Learn more about equations here:

https://brainly.com/question/17194269

#SPJ2

Please help me with this i will give brainliest

Answers

Answer:

i think it's 10%

Step-by-step explanation:

if x = 5, find the value of (x+3)²

Answers

Step-by-step explanation:

Given

if x = 5 Then

(x+ 3)²

= ( 5 + 3) ²

= 8²

= 64

Hope it will help :)❤

X=5
(X+3)^2
(5+3)^2
8^2
64

he output is five less than triple the input

Answers

Input usually means x and output is y
So triple mean 3
You have 3x than
Output is means y=
Y=3x is what we have now
So five less is -5
Y=3x-5 should be the final answer
Hope this helps!

the midpoint between -1/11 and 9/11

[tex]-\frac{1}{11}and\ \frac{9}{11}[/tex]

Answers

4/11

Hope this helps:):)

Answer:

4/11

Step-by-step explanation:

-1/11+9/11=8/11

mid=(8/11)/2

=4/11

1,2,2,3,4,6,8,9,10 what is the median HELP

Answers

The elements of the dataset are integers, and the median of the dataset 1,2,2,3,4,6,8,9,10 is 4

How to determine the median?

The data elements are given as:

1,2,2,3,4,6,8,9,10

The median element is the middle element, and the middle element is: 4

Hence, the median of the dataset 1,2,2,3,4,6,8,9,10 is 4

Answers

If Nigel has 66 pens and Kat has 1/3 pens of Nigels than you would have to find 1/3 of 66 which is 22
Then you would add 66+22=88
They have 88 pens altogether

Hope this helps :)

HELP ME PLZZ, ASAP!!

Answers

I’d say first, second and last I’m not sure tho, so don’t take my word for it

Last question for the day plz help thank you!!<3

Answers

Answer: A

Step-by-step explanation:

The graph of which equation is shown below?

y = −2x + 3

A.) y = -2x + 3

B.) y = 2x + 1.5

C.) y = 2x + 3

D.) y = −2x + 1.5

Answers

A. It’s the same thing

Answer: The answer is y=-2x+3

Help ASAP Need This Answered RN

Answers

A(3,3)
B(1,4)
C(4,1)
D(2,0)
E(0,1.5)

B is (1,4) A is (3,3) C is (4,1) D is (2,0) E is (0,1.5)

Please help me i need it -_-

Answers

The answer to your question is option b

[tex]y= 82(1.045)[/tex]What is the rate of growth Michael expects each week after launching the website?

y=82(1.045)

Answers

Answer: pls help with the answer this is hard

Step-by-step explanation: i really need help!!!

3) A drawer contains 10 blue pens, and 10 red pens. Without looking, Mrs.
Stanton is going to take one pen from a drawer, use it, and then put it back in
the drawer. Then he is going to take another pen from the drawer to use. What
is the probability of Mrs. Stanton taking a red pen first and then taking a blue
pen? P(red, then blue)?

Answers

The probability is 1/2 because he has an even amount of both colored pens so there are 50% blue and 50% red the odds are like flipping a coin in the air. There is a 50% chance that it will land on either heads or tails in other words 50/100 which is also 1/2 same thing applies with the pens.

Answer: 1/2

I WILL AWARD BRAILLIEST PLEASE HELP ASAP!!

Giorgio is learning to play the piano. By the end of each month, he has learned 3 new songs.

Part A Graph 5 points on the coordinate plane below that show the total number of songs Giorgio has learned by the end of each month from month 1 to month 5.

Which equation represents the relationship between the independent variable, x , and the dependent variable, y?

Answers

Answer: y = 3x

Step-by-step explanation:

The answer is y=3x because every month Giorgio learns a new song. so for the first month they learned 3 songs and in the second month they learn 3 more that adds up to 6 song total, so if you just times the month by 3 you will get your answer.

Answer

the way you have it there is right for the giorgio and for the second one it will be x=3x

Write an equation in point-slope form of the line that passes through the point (5, 1) and has a slope of -3

Answers

Answer:

y - 1 = -3(x - 5)

Step-by-step explanation:

An equation in point-slope form of the line that passes through the point (x₁,y₁) and has a slope of m:

y - y₁ = m(x - x₁)

m = -3

(5, 1) ⇒ x₁ = 5, y₁ = 1

Therefore:

y - 1 = -3(x - 5)

PLZ help me with simple probability I think!!!!
Plz, tell me the answer with an explanation of the answerr for the points...
Thank you!!!

Answers

Answer:

16/25

Step-by-step explanation:

Here, we want to get the probability of obtaining at most two heads

At most 2 heads mean we can get 0, 1 or a maximum of 2 heads

The total frequency for this three set is 15 + 20 + 29 = 64

So we have the probability as;

64/100 = 16/25

Write an expression that is equal to m.m.m.m

Answers

Answer:

m^4

Step-by-step explanation:

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