Mathematics High School

Please help me solve these equations. Very confusing.

Please Help Me Solve These Equations. Very Confusing.

Answers

Answer 1

Step-by-step explanation:

1A (3,-2)

1B

By substitution

[tex]4x - 3y = 18 \\ 2x + y = 4 \\ y = 4 - 2x \\ 4x - 3(4 - 2x) = 18 \\ 4x - 12 + 6x = 18 \\ 10x = 30 \\ x = 3 \\ y = 4 - 2(3) \\ y = 4 - 6 = - 2[/tex]

1C

By elimination

[tex](4x - 3y = 18) -2 \times (2x + y = 4) \\( 4x - 3y = 18) - (4x + 2y = 8) \\ - 5y = 10 \\ y = - 2 \\ 4x - 3 \times ( - 2) = 18 \\ 4x + 6 = 18 \\ 4x = 12 \\ x = 3[/tex]

Please Help Me Solve These Equations. Very Confusing.

Related Questions

the answer choices are 39, 51, 70.5, 78 please help! i’ll give brainliest

Answers

Answer: 51 degrees

Step-by-step explanation:

How do I divide 2x^4 + 5x^3 + x - 1 by x^2 - 2x + 1 using long division?

Answers

Answer: 2x^2+ 9x +16+ 24x- 17/ x^2- 2x +1

Step-by-step explanation:

Graph the inequality in a coordinate plane.
Y_<6x-8

Answers

Answer:

Y-intercept is -8 and slope is positive 6. The line is a solid and is shaded down.

Step-by-step explanation:

Hope this helps. Pls give brainliest.

Austin has already jarred 9 liters of jam and will jar an additional 6 liters of jam every day.
How much jam did Austin jar if he spent 5 days making jam? Write and solve an equation to
find the answer.

? liters

Answers

Answer:

x= (6 x 5) +9

x= 30+9

x=39

Austin will have jarred 39 litres of jam in total in 5 days

lol thats a lotta jam

Step-by-step explanation:

A $100 pair of headphones is marked down by 10% and you also have a 20% off coupon. What is the final price, before tax?

Answers

Answer:

$72

Step-by-step explanation:

100 - 10% = 90

90 - 20% = 72

11) A 10-sided die is rolled twice. The set of equally likely outcomes is
{1,2,3,4,5,6,7,8,9,10). Find the probability of rolling an even number and
then roll a number smaller than 5.

Answers

The Answer is 50 50 and the number under five would be 2 or 4

a copy machine copy’s 90 pages in 30 seconds. how long will it take to copy 30 pages. ?

Answers

Answer:

10 seconds

Step-by-step explanation:

90 divided by 3 is 30, so 30 divided by 3 is 10.

Please let me know if it helps.

Answer:

10 Seconds

Step-by-step explanation:

90 pages on 30 seconds

so think about this: how many pages per second?

90/ 30 = 3

3 pages per second

so how many seconds will it take it to copy 30 pages?

30/3 = 10

So 10 seconds.

Mrs. Greever has four square desks pushed
together as shown. She wants to tape a diagonal
"x" on the top of each desk, because the desks are
broken. How many total feet of tape will she need?
Round to the nearest whole number.

Answers

Answer111

Step-by-step explanation:i111

What is the pattern?

Answers

Answer:

to the left of 0 it goes up negative 1/2 and on the right side of 0 it goes up 1/2 from 0

Step-by-step explanation:

5(x + 9) + 53 = 14 − 6x

Answers

Answer:

x = -84/11

Step-by-step explanation:

Hope it's right

A rare baseball card was purchased for 200$ after it was autographed by the player its price increase by 150% what is the price of the card now

Answers

Answer:

$500

Step-by-step explanation:

Can someone help me out please??​

Answers

Answer:

X < 4

Step-by-step explanation:

-7 > 13 - 5X

-7 = 13 - 5X

-7 -13 = -5X

-20 = -5X

-20 /-5 = -5X /-5

4 = X

4 > X

X < 4

Answer:

Step-by-step explanation:

This week, 28% of customers ordered the fish entrée. If there were 900 customers this week, how many customers ordered the fish entrée?

Answers

Answer:

252 people

Step-by-step explanation:

There are two ways of solving.

you can use a proportion or an equation.

is=% as a decimal×of

or the proportion

[tex] \frac{is}{of} = \frac{\%}{100} [/tex]

step 1- Identity which is which.

28 is the percent and 900 is the of. we need to find the is.

step 2-

if you use an equation:

is=0.28x900

is=252

252 people ordered fish

you can also use a proportion

[tex] \frac{is}{of} = \frac{\%}{100} [/tex]

[tex] \frac{x}{900} = \frac{28}{100} [/tex]

x is a variable in place of is.

then, we cross cancel.

[tex]900 \times 28 = 100x[/tex]

25200=100x

x=252

The number of customers who ordered the fish entrée this week is 252.

What is the percentage?

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

Given, This week, 28% of customers ordered the fish entrée and there were 900 customers this week.

Let, 'x' be 28% of 900 customers.

Therefore,

28% of 900 is 'x' which is,

= (28/100)×900.

= 252 customers.

Learn more about percentages here :

https://brainly.com/question/24159063

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EZ PTS PLS HELP AND ILL MARK BRAINLIEST IF ITS RIGHT :D

Answers

Answer:

rational ; 7, 6.15, 1/5, 3 squared 27,

irrational; 3 squared, 3 squared 16, 5 squared over 3

radical form

1. 3 exponent squared 5

2. 5 exponent squared (4x)^3          

Step-by-step explanation:

The area of a circle is 36 pi M squared what is the circumference in meters express your answer in terms of pi

Answers

Answer:

Circumference = 12π m

Step-by-step explanation:

The area of the circle, A = 36π

We need to find the circumference of the circle.

The area of a circle is given by :

[tex]A=\pi r^2\\\\36\pi=\pi r^2\\\\r=6\ m[/tex]

The circumference of a circle is given by :

[tex]C=2\pi r\\\\C=2\pi \times 6\\\\C=12\pi\ m[/tex]

So, the circumference of the circle is 12π meters.

The weight of an object is affected by gravity. Something that weighs 1 pound on Earth will weigh 1.08 that weight on Saturn. If a rock weighs 3 pounds on Earth, what will it weigh on Saturn?

Answers

Answer:

3.24 pounds

Step-by-step explanation:

3*1.08=3.24

A bucket of golf balls contains yellow golf balls and white golf balls. You collect there presentative sample shown. Based on your sample, predict how many golf ballsare yellow If the bucket contains 60 golf balls

Answers

Answer:

30

Step-by-step explanation:

Half of 60 is 30. I am not a 100% sure of it tho.

A $150 bike was on sale for 30% off the original price. How much money does a person save if she buys it on sale?

Answers

Answer:

50$

Step-by-step explanation:

150÷3=50$

we divided over 3 becase its30% off so

It’s 50 dollars because 150 divide by 3 is 50

A rectangular floor is covered with 50 square tiles each of side 20 cm.What is the area of the floor?

Answers

I think 20,000 cm squared
or 200 meters squared

Can someone please help and make sure it’s right :)

Answers

Again corresponding angles theorem! These 2 angles are equal.

77=5x+17

5x=60

x=12

Done!

Any questions just leave in the comments.

4) TRY THIS! When you fold a rectangular piece of paper in half,
the fold creates two new rectangles. If you fold the folded piece
of paper again, the folds will create 4 rectangles. Every time you
fold the paper the number of rectangles will double. How many
rectangles will there be if you folded the piece of paper 10
times?

Help m en please right now

Answers

Answer:

yes me too

Step-by-step explanation:

15 - 2b = -9
What does b equal

Answers

Answer:

clt

15+9=2b

24=2b

dbs by 2

24/2=2b/2

b=12

What is the perimeter of this triangle?
A- P=40in
B- P=38in
C- P=48in
D- P=45in

Answers

the answer is C

good luck

One kilometer is approximately 0.6 miles. Which is closest to the number of miles in 5 kilometers?

Answers

Answer:

3.1

Step-by-step explanation:

\begin{aligned} &-x+4y=-9 \\\\ &y=-2x +6 \end{aligned} ​ −x+4y=−9 y=−2x+6 ​ Is (2,3)(2,3)left parenthesis, 2, comma, 3, right parenthesis a solution of the system?

Answers

Answer:

NO

Step-by-step explanation:

Given the system of equation

-x+4y = -9,... 1

y = -2x+6.... 2

To find the solution to the equation

Substitute equation 2 into 1

-x+4(-2x+6) = -9

-x-8x+24 = -9

-9x= -9-24

-9x = -33

x = 33/9

Find y

y = -2x+6

y = -2(33/9)+6

y = -66/9 + 6

y = -66+54/9

y = -12/9

y = -4/3

Hence (2,3) is not the solution to the system of equation

The length of a rectangular sandbox is 4 feet less than its width, which is represented by x. The area is 45 square feet. Which equation can be used to find the area of this sandbox?
1.x^2+4=45
2.x(x+4)=45
3.x(x-4)=45
4.x(2x+4)=45

Answers

Answer:

3

Step-by-step explanation:

w= x

l= x-4

x(x-4) = 45

x^2-4x = 45

Please help. will give brainliest. this question should be easy

Answers

Answer:

the answer is D

you got it right

Step-by-step explanation:

You buy a flight to California for $305.72. The tax is 7.65%. What is the final cost of the ticket?



Show work and use method

Answers

Answer:309.83

Step-by-step explanation:

The final cost of the flight ticket $329.10758.

Given that, the cost of flight ticket is $305.72 and tax=7.65%.

What is the tax?

Taxes are mandatory contributions levied on individuals or corporations by a government entity—whether local, regional, or national. Tax revenues finance government activities, including public works and services such as roads and schools, or programs such as Social Security and Medicare.

Now, tax = 7.65% of 305.72

= 7.65/100 × 305.72

=0.0765 × 305.72

=$23.38758

Total cost = 305.72+23.38758

=$329.10758

Therefore, the final cost of the flight ticket $329.10758.

To learn more about the tax visit:

https://brainly.com/question/16423331.

#SPJ2

Which of the following lists of Triangle side lengths would not be considered a Pythagorean Triple?

A. 5, 12, 13
B. 7, 24, 25
C. 9, 21, 23
D. 12, 35, 37​

Answers

Answer:

c

Step-by-step explanation:

which one is it i am confused

Answers

I’m 90 percent sure that the proportion is 14.25
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