Mathematics High School

8 + 2r = −10 what is r?

Answers

Answer 1

Answer:

r = -9

Step-by-step explanation:

Subtract 8 from both sides to get 2r = -18. Divide by 2 on both sides to get r = -9.

Answer 2

Answer:

r=-9

Step-by-step explanation:

Step 1:- Simplify both sides of the equation.

2r+8 = -10

Step 2:- For isolating the variable, subtract 8 from both sides.

2r+8-8 = -10-8

2r = -18

Step 3:- For isolating the variable, divide by 2 from both sides.

2r/2 =-18/2

r= -9

Hope this helps :)

Related Questions

If A < B, where on the number line will A appear?
A. To the right of B
B. In exactly the same location as B
C. To the left of B

Answers

C! Because it is saying that B is greater than A, meaning that B is gonna be more to the right of the number line

Does anyone know the answer to this?

Answers

Answer:

2640

Step-by-step explanation:

Yes:No = 7:5

Total votes = 6336

So, 7x+5x = 6336

12x = 6336

x = 6336/12 = 1056/2 = 528

Number of No votes = 5*528 = 2640

HURRY I’ll mark you as brainliest

P = 400n – 7,200

In the formula, P is the monthly profit and n is
the number of bicycles sold in a month. How
many bicycles must he sell to make a profit of
exactly $2,000 in a month?

Answers

Answer:

23

Step-by-step explanation:

Johnnie runs 4.5 km everyday to stay in shape. It takes him 30 minutes to run his route. What is his average speed per hour?

Answers

Answer:

The average speed is 9 km per hour

Step-by-step explanation:

Average speed = total distance ÷ total time

Let us use this rule to solve the question

∵ Johnnie runs 4.5 km every day

∴ The total distance = 4.5 km

∵ It takes him 30 minutes to run his route

∴ Total time = 30 minutes

→ We need to change the time to hours to find the average speed in km/h

∵ 1 hour = 60 minutes

→ Divide the time by 60 to change it from minutes to hours

∴ Total time = 30/60 = 0.5 hour

∵ Average speed = distance ÷ time

∴ Average speed = 4.5 ÷ 0.5

∴ Average speed = 9 km/h

∴ The average speed is 9 km per hour

Which of the following is a rational number?
22. 23. 24. 25

Answers

Answer:

24

Step-by-step explanation:

It can be expressed as a ratio

In triangle ABC, AB measures 25 cm and AC measures 35 cm.
The inequality
centimeters.
represents the possible third side length of the triangle, s, in
The inequality
centimeters.
J

represents the possible values for the perimeter, p, of the triangle, in

Answers

Answer:

10, 60, 70, 120

Step-by-step explanation:

Correct on edge 2020

Answer:

10<s<60

70<p<120

Step-by-step explanation:

35-25=10

35+25=60

3(3x + 4) – 5 = -2 what does x equal

Answers

Answer:

x=-1

Good Luck!!!

Answer:

9x+12-5=-2

9x+7=-2

9x=-2-7

9x=-9

×=-1

Step-by-step explanation:

Walter and Brian each have a CD collection. The number of CDs in Walter's collection can be represented by x. The number of CDs in Brian's collection is 3 times the number in Walter's collection. The total number of CDs in both collections is 144. What is x, the number of CDs in Walter's collection?

Answers

Answer:

36CDs

Step-by-step explanation:

The number of CDs in Walter's collection can be represented by x. The number of CDs in Brian's collection is 3 times the number in Walter's collection.

Hence, Brian's collection = 3x

The total number of CDs in both collections is 144.

We have the Equation:

x + 3x = 144

4x = 144

x = 144/4

x = 36

Therefore, the number of CDs in Walter's collection is 36 CDs

3.) Graph on Geogebra the linear equation y=2x, then select the correct 10 points
line: *
O Blue line
Green line
Black line
Red line

Answers

YEEEEEEEEEAAAAAA BABY ITS TUES

which is greater 0.95 or 3/4

Answers

Answer:

0.95

Step-by-step explanation:

3/4 = 0.75 and I guess 0.95 > 0.75

Sorry That I couldn't explain more, but i hope this helps!

Answer:

0.95 is greater than 3/4

Step-by-step explanation:

3/4 in fraction format is 0.75.

and 0.95 is greater than 0.75

true or false?
All whole numbers are irrational numbers​

Answers

whole numbers are irrational number. Some rational numbers are not integers. Some integers are not whole numbers.
(Basically saying true)

What is the distance between points
(5, 5)
and
(1, 5)
on a coordinate plane?

Answers

Answer:

√[(5-1)² + (5-5)²]

√[16+0]

√(16)

+4 or -4 units

I hope this helped :D

Step-by-step explanation: for your other question

((

−

4

,

7

)

(

−

4

,

5

)

Answer:

4

Step-by-step explanation:

Find the sum of 2ab and 9ab

Answers

Answer:

11ab

Step-by-step explanation:

2ab + 9ab = 11ab

Evaluate the expression -3(n + 7) + 5 using n=5

Answers

First substitute the n=5 with N
-3(5+7)+5
Then it’s just simple steps. Distribute the -3 by the numbers in the parentheses.
-15-21+5
The add them all
You will get -31

Answer:

-31

Step-by-step explanation:

First you distribute

(-15-21)+5

Then you add and subtract from left to right.

-36+5

-31 is your answer

How do you make a graph wider

Answers

Answer:

By saving it then editing it

Step-by-step explanation:

-1/3 - ( -5\12)= ??
please answer its a test

Answers

Answer:

1/12

Step-by-step explanation:

-1/3-[-5/12]=?

-1/3-*-5/12=?

-1/3+5/12=

Get the least common multiple:12

-1/3*4/4+5/12*1/1=?

-4/12+5/12=?

1/12

answer this asap and i will give u brainliest

Answers

Answer -2 and-6 how I helped

HELP!!!!!!!!!!!!!!!!

Answers

Answer:

1/15

Step-by-step explanation:

First you have to use the equation:

Y2-y1 / x2-x1

13-14 is over -3-12

So we would get -1 over -15

which simplifies to 1/15

Complete the expression in terms of P and Q so the result is -5b^2+8b-3. Drag the terms to the correct location on the expression. Not all terms will be used.

Answers

Answer:

(-5b+3)(b-1)

Step-by-step explanation:

We need to factorize the given expression

-5b^2+8b-3

-5b^2+5b+3b-3

(-5b^2+5b)+(3b-3)

factor out the common terms:

-5b(b-1)+3(b-1)

(-5b+3)(b-1)

Hence the expression equivalent to -5b^2+8b-3 is (-5b+3)(b-1)

Answer:

Q-3P

Step-by-step explanation:

edmentum told me

The ratio of boys to girls in Ms. Seeley’s class is 12/18. Which ratio of boys to girls is equivalent?
3:4
4:9
4:6
2:4

Answers

Answer:

3.9 is the possibility of this answer as shown

One step equation 21=-7

Answers

Answer:

[tex]n = - 3.[/tex]

Step-by-step explanation:

[tex]21 = - 7n \\ n = \frac{21}{ - 7} \\ n = - 3. \\ \\ [/tex]

♨Rage♨

Help me step by step plz

Answers

Answer:

x=-6

Step-by-step explanation:

Divide both sides by -4

You will get an answer of x=-6.


X=-6


Divide both sides by -4


If g(x) = 7(4 – 2x) + 5
evaluate g (11)

Answers

Answer:e

Step-by-step explanation:e

Answer:

g(11) = 7(4-2*11) + 5 = 7*(-18)+5= -121

Step-by-step explanation:

if it helps make it braintliest please

−a2 − (2a − 7b) + b for a = −2 and b = 3

Answers

Answer:

24

Step-by-step explanation:

Given

- a² - (2a - 7b) + b ← substitute a = - 2, b = 3 into the expression

= - (- 2)² - (2(- 2) - 7(3)) + 3

= - 4 - (- 4 - 21) + 3

= - 4 - (- 25) + 3

= - 4 + 25 + 3

= 24

Answer:  32

Steps: -(-2)2  -  [ 2(-2) - 7(3) ]  +  3

• Follow the PEMDAS order of operations

Calculate within parentheses  [ 2(-2) - 7(3) ] :   -25

= -(-2)2 -  (-25)  +  3

Multiply and divide (left to right):  4  -  (-25)  + 3

Add and subtract (left to right):    32

Plz mark brainliest:)

Match each fraction with its equivalent decimal number.
1.7/9
2.7/19
3.7/8
4.7/15


A.0.875
B.0.46
C.0.7
D.0.7
​

Answers

Answer:

below

Step-by-step explanation:

We can divide all the given fractions to find there decimal equivalents.

7 ÷ 9 = 0.77...

7 ÷ 19 = 0.368421

7 ÷ 8 = 0.875

7 / 15 = 0.466...

Now, we see that these match up;

7.9 -> C or D (It's not specific in whether the 7 repeats so if it does on your end, please choose that option)

7/19 has no equivalent option.

7/8 -> A

7/15 -> B

Best of Luck!


Plz answer the question it’s timed

Answers

Answer:

[tex]y < 2 \: and \: y \leqslant - 2x - 1[/tex]

Step-by-step explanation:

The colored in area in the graph is below both graphs, therefore both equations are less than, or less than or equal to.


13. Evaluate: 7x + 4y when x=5 and y=-3

Answers

Answer:

13

Step-by-step explanation:

7x + 4y

7(5) + 4(-3)

25 -12

13

Answer:

23

Step-by-step explanation:

7*5=35

4*-3=-12

35+-12=23

please answer this for me ​

Answers

35

3x5=15 + 2x10=20

15+20=35

What’s the slope pls answer quick

Answers

-7/4 if you’re using the rise/run method :)

HELP ONLY HAVE 2 MINUTES!!!!!!!!!!!!!!!!!!!!!!

Answers

A is the correct choice. Y=90x. All y values are multiples of 90.
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