Mathematics High School

Solve for y 2y +9=8y +21 Simplify your answer as much as possible, y =?​

Answers

Answer 1

Answer:

y=2

Step-by-step explanation:

Answer 2

Answer:

y = -2

Step-by-step explanation:

you need to regroup the numbers.

2y + (-8y) = 21 + (-9)

-6y = 12

y = -2

Related Questions

Write this decimal in expanded form: 201.123

Answers

Answer:

200 + 1 + .1 + .02 + .003 + = 201.123

the expanded form is 200 + 1 + .1 + .02 + .003

Question 2
1 pts
Carla is renting a canoe. It costs $100 for 2 hours and $160 for 5 hours. What is
the rate of change for this situation in dollars per hour? Do NOT put in a $.
numerical answer only.
Question 3
1 pts

Answers

Answer:

i hope that is what you are looking for

Step-by-step explanation:

100/2 is 50 dollars per hour

160/5 is 32 dollars per hour

If a rectangle has perimeter of 50 cm., what could its dimensions (length and
width) be? Select all correct answers.
O 25 cm and 25 cm
15 cm and 10 cm
5 cm and 20 cm
10 cm and 5 cm

Answers

Answer:

The two middle ones: 15cm and 10cm; 5cm and 20cm

Step-by-step explanation:

The first one would be a rectangle with a perimeter of 100, while the last would have a perimeter of 30.

PLS HELP ITS EASY AND DUE SOON!!!!!!!!!!!!

Answers

Answer:

The answer is 5

Step-by-step explanation:

40 ÷ by 8 = 5

8 × 5 = 40

Please solve whatever this is, I’ll mark whoever gives me the right answer as brainliest!

Answers

Answer:

y= -a/bx +c/b

m= -a/b

b= c/b

Step-by-step explanation:

Hope this helps

The quantities xxx and yyy are proportional. xxx yyy 141414 1.41.41, point, 4 161616 1.61.61, point, 6 212121 2.12.12, point, 1 Find the constant of proportionality (r)(r)left parenthesis, r, right parenthesis in the equation y=rxy=rxy, equals, r, x. r =

Answers

Answer:

it was i believe .1

Step-by-step explanation:

.1 bc i had done it yesterday and for some reason the girl deleted her answer

Answer:

r=.5 or 1/5

Step-by-step explanation:

please help me with this. please. thank you

Answers

ommg we’re doing the same work !!

Which of the following comparisons is correct?
-2 2
4<−4
−6< −5

Answers

Answer: Choice D)   -6 < -5

================================================

Explanation:

Let's go through the answer choices

A) This is false because -2 is actually larger than -5. Make a number line and you'll see that -2 is to the right of -5. Numbers on the right are larger than numbers on the left. B) This is also false. The value 0 is smaller than 2. A number line might help show this.C) Also false. It should be 4 > -4. Any positive number is always larger than any negative number. D) This is true. On a number line, -6 is to the left of -5, so -6 is smaller than -5. This makes -6 < -5 a true statement.

At the recent school pep rally, 63 out of 300 students wore the school colors. What percent of students wore the school colors? *

A) 21%
B) 79%
C) 63%
D) 30%

Answers

30 BecauE u have to do maths and use all the math things

(2x + 30)
(4x – 90°
What value for x will show that lines / and m ar parallel?

Answers

Answer:

d. 60

Step-by-step explanation:

[tex](2x + 30) \degree = (4x - 90) \degree \\ (exterior \: alternate \: \angle s) \\ \\ 2x + 30 = 4x - 90 \\ \\ 30 + 90 = 4x - 2x \\ \\ 120 = 2x \\ \\ x = \frac{120}{2} \\ \\ x = 60[/tex]

Which equation could be used to find the value of x?

Triangle DEF where angle E is a right angle. DE measures 55. EF measures x. Angle D measures 49 degrees.

cos 49° = x over 55
tan 49° = x over 55
cos 49° = 55 over x
tan 49° = 55 over x

Answers

yes it should be tan 49 degrees = x over 55

The answer is tan 49° = x over 55 (I got it correct on my quiz).

there are 30 red marble and 150 blue marblee in a box what is the ratio of blue marblee tonred marbles​

Answers

Answer: 150:30

Step-by-step explanation: First, put 150. Next, put a : sign. Lastly, put the number 30. Hopefully this helped! :D

please help me please

Answers

Answer:

It’s 16

Step-by-step explanation:

I just know, I used to do this

Supplementary angles equal 180
Complementary equal 90
So supplementary

5x - y = 10
3x - 2y = -1
what is the solution
​

Answers

Answer:

I believe the answer is

(x,y)=(3,5)

The height of the house is 35 feet. What is the height x of each story?

Answers

Answer:

14

Step-by-step explanation:

35-7 is 28. 28 divided by 2 is 14.

I NEED HELP PLEASE !!!!!

Answers

Answer:

10 secs

Hope this helped, if not, don’t hate.

If m CDE=(3x+10)° m CDF=(x+25)°, and m EDF= 65°. Find m CDF​

Answers

m∠CDF + m∠EDF = ∠CDE

[tex]x + 25° + 65° = 3x + 10[/tex]

[tex]x + 90° = 3x + 10[/tex]

[tex]90° = 3x + 10 - x[/tex]

[tex]90° = 2x + 10[/tex]

[tex]2x + 10 = 90[/tex]

[tex]2x = 90 - 10[/tex]

[tex]2x = 80[/tex]

[tex]x = \frac{80}{2} [/tex]

[tex]x = 40°[/tex]

m∠CDE

= 3 × 40 + 10

= 120 + 10

= 130°

Then , m∠CDF =

[tex]x + 25 \\ = 40 + 25 \\ = 65°[/tex]

•°• m∠CDF = 65°

The sum of three consecutive ODD numbers is -21. FIND THE THREE INTEGERS. define the variables,write and solve the equation,give all answer. HELPL!! DUE IN 13 MINUTES

Answers

Answer:

ok so

Step-by-step explanation:

Alonso went to the market With $55 to buy eggs and sugar he knows he needs a package of 12 eggs that cost $2.75 after getting the eggs he wants to buy as much sugar as he can with his remaining money does sugar he likes comes in boxes that each cost $11.50

Answers

Given:

Alonso has total amount = $55

Cost of a package of 12 eggs = $2.75

Cost of sugar box = $11.50

To find:

The number of sugar boxes he can buy with the remaining money after buying a package of 12 eggs that cost $2.75.

Solution:

Let the number of sugar boxes he can buy be x.

Total cost of x sugar boxes = $11.50x

Total cost of x sugar boxes and a package of 12 eggs = $(11.50x + 2.75)

The total cost must be less than or equal to $55.

[tex]11.50x + 2.75\leq 55[/tex]

[tex]11.50x\leq 55-2.75[/tex]

[tex]11.50x\leq 52.25[/tex]

Divide both sides by 11.50.

[tex]x\leq \dfrac{52.25}{11.50}[/tex]

[tex]x\leq 4.54348[/tex]

So, the greatest integer value of x is 4.

Therefore, he can buy 4 sugar boxes with his remaining money.

PLEASE HELP THIS IS DUE SOON

Answers

Answer:

9.2

Step-by-step explanation:

9.2 squared equals 84.64  and anygreater it equal 3 digit numbers

To get an answer to increase you multiply by A 1/2 B 3/4 C 4/5 D 6/5​

Answers

Answer:

D

Step-by-step explanation:

y=7x-2 which ordered pair is a solution of the equation
Only (3,15)
Only (-1,-10)
Both (3,15) and (-1,-10)
Neither

Answers

Answer:

Neither

Step-by-step explanation:

Just took the quiz

m= -(4+m) + 2

solve for m​

Answers

Step-by-step explanation:

[tex]m = - ( 4 + m) + 2[/tex]

[tex]m = - 4 - m + 2[/tex]

[tex]m + m = - 4 + 2[/tex]

[tex]2m = - 2[/tex]

[tex]m = - 1[/tex]

is the required Answer.

Hope it helps :)

Answer:

-1

Step-by-step explanation:

4 times a number is 21 less than the square of that number. Find the positive solution ​

Answers

Answer:

Step-by-step explanation:

Let the number be x

by given condition,

4x = (x)² - 21

4x = x²- 21

0 = x² - 4x - 21

0 = x² - 7x + 3x - 21

0 =  x ( x-7) + 3 ( x - 7)

0 = (x+3)(x-7)

hence

x + 3 =0.....

x = -3---------1

x - 7 = 0

x = 7 ------------2

we got value of x from 1 and 2.. but the question says positive value of x.

hence, x = 7 is the required value of x.

What is the slope of the linear equation y=-2+6​

Answers

Answer:

The slope would be m=0 as it is a straight line.

Step-by-step explanation:

You use the slope intercept formula y=mx+b to find the slope.

will mark brainy pls help

Answers

Answer:

i believe its 300

Step-by-step explanation:

Answer:

Heres my guess on it, he can feed around 301 people

Step-by-step explanation:

I think you would first find out how much it would cost to feed 1 person, which can be done by taking 18.45/3. It will equal around $6.15. then you would take that number and divide by the money he is willing to spend, which is 1850

(1850/6.15)

You get 300.81 which can round to around 301 people

Divide 7 by 20 to convert 7/20 to a decimal

Answers

Answer:

0.35

Step-by-step explanation:

To get 7/20 converted to decimal, you simply divide 7 by 20. Don't worry. You don't need to get the calculator out, because we did this for you. 7/20 as a decimal is: 0.35 Note: When Research Maniacs calculated 7/20 as a decimal, we rounded the answers to nine digits after the decimal point.

I think it will be 0.35 because that is what 7 divide by 20 is.


Which of these is an Irrational number?
А
4.789
В
6.66666...
С
3.14159...
D
7.00000001

Answers

Answer:

the anser and the

Step-by-step explanation:

Answer:

If im wrong just say but i think it B

Step-by-step explanation:

Solve the equation. Round the solution to the tenths place.
6.35t = 56.515
t =

Answers

Answer:

t = 8.9

Step-by-step explanation:

6.35t = 56.515

56.515 / 6.35 = t

t = 8.9

What is the mode of the data set below 0,1,1,0,2,3,2,1,0,4,1,1

Answers

Answer: The mode would be 1

Step-by-step explanation: To find the mode of a set of numbers you need to

put all the numbers in order. Then, you need to count how many of each number you have in the set. And the number that appears the most is the mode.

Answer:

The mode is 1 because it appears the most amount of times

Step-by-step explanation:

Hope it helps :)

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