Mathematics High School

8 - 2x + 4 + 8x – 21

Answers

Answer 1

Answer: 6x -9

Step-by-step explanation:

Answer 2

Answer:

6x - 9

Step-by-step explanation:

8 - 2x + 4 + 8x - 21

combine like terms

6x - 9

Related Questions

Need help with this, please.

Answers

Answer:

Step-by-step explanation:

Allison decided to start by saving $10 the first week of the year in her bank. Then, the next week she would save $2 more dollars than the previous week and put that in the bank (e.g. on week 2 she saved $12). If she kept increasing the amount in this way how much will she have saved in total by the end of the year? Question 4 options: $112 $114 $3172 $3340

Answers

enjoy ;) *debby smirk*

On a map, there are 3 centimeters between two cities. The actual distance between the cities is 45 kilometers.

What was the scale used for the map?

please help

Answers

Answer:

15km/cm

Step-by-step explanation:

All you do is divide 45 by three to determine your scale

Answer:

3cm on map = 45 km

1 cm on map = Xkm

Xkm = 45 / 3

Xkm = 15km

Therefore scale = 1:15000

Step-by-step explanation:

Solve the following:
4x-3=2x+7

Answers

Answer:

= 5

Step-by-step explanation:

Add 3 to both sides of the equation 4 − 3 = 2 + 7 4x-3=2x+7 4x−3=2x+7 4 − 3 + 3 = 2 + 7 + 3

Simplify Add the numbers Add the numbers 4 = 2 + 1 0

Subtract 2 2x 2x from both sides of the equation 4 = 2 + 1 0 4x=2x+10 4x=2x+10 4 − 2 = 2 + 1 0 − 2

Simplify Combine like terms Combine like terms 2 = 1 0

Divide both sides of the equation by the same term 2 = 1 0 2x=10 2x=10 2 2 = 1 0

Simplify Cancel terms that are in both the numerator and denominator Divide the numbers = 5

Solution x=5

X > -9 written in words

Answers

Answer:

X is greater than negative-nine (-9).

1. The line passes through (-7,5) and (-8,13)
answer must be written in slope imtercept form.
2. the line passes through (15,1) and (0,-4)​

Answers

1. Find slope
(Y2-y1)/(x2-x1)
(13-5)/(-8+7) = 8/-1 = -8
y = -8x + b
5 = 56 + b, b = -51
Equation: y = -8x - 51

2. (-4-1)/(0-15) = -5/-15 = 1/3
y = 1/3x + b
Now do the rest on your own

bob buys a t-shirt for $7.45 he pays with a 20 bill. how much change will he get?
im in 5 grade im 10 years old can you solve this for me please

Answers

Answer:

$12.55

Step-by-step explanation:

Subtract! 20 - 7.45

Mr.Davis treated his team to a pizza party after their last baseball game. He bought 7 cheese pizzas and spent less than $70.00. Write and solve an inequality to find the cost of each pizza.

Answers

Answer:

About $10 for each Pizza.

Step-by-Step:

We can use the equation 7a=70 to solve the problem. a= Amount. We divide 7 on both side which is 10. So a=10.

ILL GIVE BRAINLIST IF YOU ARE RIGHT 1. (05.01 LC)
The graph shows the distance, y, that a car traveled in x hours:

What is the rate of change for the relationship represented in the graph? (1 point
55
54
1/54
1/55

Answers

I think The answer is 55

Answer:

55 (A) (I understand you bro)

because here, 1 (x) is = to 55 (y), the rate is 1:55 (x:y). This is a ratio, it's gonna bother you later

-4x –12 = 48 a.x = 9 b.x = -9 c.x = 15 d.x = -15

Answers

Answer:

d) x= -15

Step-by-step explanation:

-4x-12=48

1. Add 12 to both sides

-4x-12+12=48+12

2. -4x=60

3. Divide -4 from both sides

Final Answer: x= -15

1 + 1 I dont know how to solve this problem please help me...

Answers

Answer:

1+1= 2

Step-by-step explanation:

or sometimes people say 11, but irl its 2

RP.1.3 At Bright Futures Middle School, 576 students ride their bike
to school. If this number is 75% of the school enrollment,
then how many students are enrolled?

Answers

Answer:

768

Step-by-step explanation:

multiply both sides of the equation by 100/75 100/75 will cancel out 75/100

please help, todays the last day

Answers

Answer:

b

Step-by-step explanation:

fiber hard to digest i love you

The answer should be B .

Can someone help me answer this question plz and thank you

Answers

I think it's a or d. Forgive me if I am wrong :(

Answer:

The equation has a greater slope.

Step-by-step explanation:

The slope of the equation is 4 while the slope of the table is 3 because y increases 3 every time x increases 1.

What is the answer to this question.

Answers

I don't think I have ever seen a question worded with "partitions AB in the ratio".

But if it means what I think it means, a figure could explain it better.

o Here is B(2,0)

o Here is P(-1,-2.4)

Here is A(-3,-4)o

There is a straight line from the bottom point (A) to the top point (B) and its equation is y=0.8x-1.6

The point (-1, -2.4) lies on the line from A to B, but not in the center.

If you find the distance from A to P, then find the distance from P to B, you can make a ratio of the two lengths.

AP = sqrt[(-1-(-3))2+(-2.4-(-4))2] = sqrt[22+1.62] = sqrt[6.56] = 2.561
PB = sqrt[(-1-2)2+(-2.4-0)2]=sqrt[(-3)2+(-2.4)2] = sqrt[14.76] = 3.842

So the two parts are in the ratio 2.561 : 3.842 (AP : PB) or 2.561/3.842 = 0.66658 = 2/3 (approx)

The point P partitions AB into two segments with ratio 2/3

Not sure if that what you mean because there isn’t a lot of context but hope that helped, have a great day

It costs $4 to sign up for a music download service and $0.50 to download each song. Jada signs up for the service
and begins downloading music.
1. Complete the table showing how Jada can spend money downloading songs.

Answers

Step-by-step explanation:

Note: I could not find any attached table of values, however, we can make do with the information given

step one:

the cost of sign up = $4

the cost of download for each song= $0.5

Step two:

Required

we want to find the cost of downloading any number of songs.

let the number of songs be x

and let the total cost be y

Hence the cost function is

y=0.5x+4

now supposing the value of x which is the number of downloads from the table is 10, then the total cost for 10 downloads will be

y=0.5(10)+4

y=5+4

y=9

Hence it will cost $9 to download 10 songs, just plug in the value of x into the cost function

Which ordered pair is a solution of the equation −1/4x + 6 = y?
A. (4, 7)
B. (2, 5)
C. (6, 0)
D. (12,3)

Answers

Answer:

C

Step-by-step explanation:

Plzzzz help!!!! I don't understand

Answers

Answer:

x = 1

Step-by-step explanation:

Answer:

x=1

Step-by-step explanation:

If a 4 ft. pole casts a 5 ft shadow, how high is a pole that casts a 15 ft shadow? 1​

Answers

Answer:

12 ft!!

Step-by-step explanation:

can u pls mark me brainliest?

Answer:

x=12 ft

Step-by-step explanation:

4/5=x/15

Multiply 5 and x to get 5x, then multiply 4 and 15 to get 60, then you're left with the equation 5x=60. Divide both sides of the equation by five to get 12 :D.

what is the volum of a cylinder with a radius of 9 inches and a heigh of 2 inches? use 3.14 for pi

Answers

Answer:

508.93

Step-by-step explanation:

Have a nice day! :)

#6. Please I really need help

Answers

Answer:

B. $18.00

Step-by-step explanation:

3 books the same cost.

$18.00*3= $54

$ 54+$1.99= 55.99

Hope this helps

The answer will be $18

-6x + 8y = 24
What is the answer?

Answers

Answer:

x=-4 y=3

Step-by-step explanation:

this is what the girl said in the comment section :) so i plugged them into the equation and she was right

5 divided by 7/10 = ?

Answers

Answer:

♡ madeline here ♡

it's 7 1/7.  have a great day, luv!

- madeline/madi

✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧･ﾟ

Step-by-step explanation:

Answer:

50/7

Step-by-step explanation:

7/10=0.7

5/0.7=7.142857143 etc. etc.

7.14

5 divided by 7

1                    10

"flip the guy and multiply"

5 times 10

1            7

50

7

=50/7 or 7 1/7 (because 7 goes into 50, 7 times)

can someone please help?

Answers

Answer:

x=86

Step-by-step explanation:

we know that all the angles in a triangle add up to 180 degrees.

if you add 74+20, you get 94. then, subtract 94 from 180 to get 86! sorry if this is wrong i tried my best T^T

Yes answer would be 86

what number decreased by 3.5 equals 12.7 i have to write an equation then solve the problem

Answers

44.5
i know this because 12.7 x 3.5= 44.5

Answer:

n - 3.5 = 12.7

n=16.2

Step-by-step explanation:

n - 3.5 = 12.7, to solve add 3.5 to both sides

n = 12.7 + 3.5

n=16.2

Approximate the solution of x^3=85

Answers

Answer:

the answer would be 3sqrt85

Step-by-step explanation:

Answer:85

Step-by-step explanation:

x^3 will =to85

find the ratio if it is given that,

a+3b/5= a-2b/[tex]a+3b/5= a-2b/2[/tex]2

Answers

Answer:

dbhjnhygtfvbhnj

Step-by-step explanation:

This month the Middle School Media newspaper has 25 pages. Twenty-five schools order the paper for each of their students. Each of the schools has 25 classrooms with 25 students in each classroom. What expression with an exponent shows the total number of pages in all of the newspapers?

Answers

Answer:

25^4

Step-by-step explanation:

Here, we want to find the expression that shows the total number of pages in all of the news papers

Number of pages per book = 25

Number of schools is 25

Number of classrooms is 25

Number of students per classroom is 25

Now; the number of students in each school

is 25 * 25

Number of students in all of the school will be;

25 * 25 * 25

So the number of pages in all of the schools will be;

25 * 25 * 25 * 25 = 25^4

On Sunday 440 people visited a museum that charges $9 for each child and $12.50 for each adult. If the museum earned $5,220 on that day, how many adults visited the museum on Sunday?​

Answers

about 50 adults visited
I need to ask bkah g yrhrjupu

1) (5x - 4)(x - 5) = 0​

Answers

Answer: The answer is 1.5

Step-by-step explanation: First you want to add 5x + x which equals 6x. Then you want to add -5+-4 which = -9. Then you add 9 to the -9 to get rid of it. But you have to do it on both sides so you add 9+0 which =9. Finally you divide 9 by 6 which equals 1.5

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