Mathematics Middle School

Complete the steps to find the sum.

(2.7 × 10–9) + (8.5 × 10–9)



1. Rearrange the expression: (2.7 + 8.5) × 10–9

2. Add the coefficients: (11.2) × 10–9

3. Write in scientific notation: 1.12 × 10k

What is the value of k in the solution?

Answers

Answer 1

Answer:

2.7

1./2. 103

The value of k is 2.7

Thanks for joining Brainly!!! :)

Answer 2

Answer:

The answer is -8

Step-by-step explanation:

Related Questions

Which number below has a value between 6.6 and 6.7?




√6


√36


√44


√49

Answers

Answer:

The answer is √44

Step-by-step explanation:

I hope this help.

Answer:

[tex]\sqrt{44}[/tex]

Step-by-step explanation:

One thumbtack weighs 0.25 ounces. Once ounce is approximately equals to 28 grams. Which of the following is closet to the weight of one thumbtack in grams?

Answers

Answer:

Is about 7 grams.

Hope this helps! :)

Answer:

7 grams.

Step-by-step explanation:

PLZZZZZZZZZZZZZZZZZ HELP ME WITH THIS IT DUE TODAY and explain!!!!!
1 is the first image question


2 is second image question

Part 2 :
1.-(-½ )-3(-2)


2.-20 ÷ (4 − (10 − 8))


3. -(7-9)-2[-5-(-9)]


Evaluate each expressions below.


4.-3x8-2x7-8x9


5. 4[30-(10-2)x3]

Answers

Answer:

1. 6 1/2 or 6.5 or  13/2

2. 10

3. -6

4. −8x9+3x8−2x

5. −32x3+120

hope this helped :)

Step-by-step explanation:

im not sure what you mean by image questions, but ill help you with part 2!

1. lets do this equation using PEMDAS

-(-1/2) - (3)(-2)

(1/2) - (-6)

1/2 + 6=

6 1/2 or 6.5 or  13/2

2. -20 ÷ (4 − (10 − 8))

-20 ÷(4-(2)

-20 ÷(2)

-10

3.

-(7−9)−2(−5−(−9))

−(−2)−2(−5−(−9))

2−2(−5−(−9))

2−(2)(4)

2−8

−6

4. 3x8−2x7−8x9

i think all you have to do here is rearrange the order

−8x9+3x8−2x

5. 4[30-(10-2)x3]

(4)(30+−8x3)

(4)(30)+(4)(−8x3)

120−32x3

−32x3+120

The first one is done for you.



a. Convert weeks to days.

6 weeks = 6 × (1 week)

= 6 × (7 days)

= 42 days

Show your work on paper, and enter your final answer.





b. Convert years to days.



7 years = ___________ × ( ___________ year)

= ___________ × ( ___________ days)

= ___________ days
Enter your final answer

Answers

7 years = 7 x 1 year
= 7 x 365 days
= 2,555 days
7 years = 7x(1 year)
=7 x (365 days)
= 2,555 days

Luisa ate 3 ounces of pretzels.

The pretzels she ate contained
grams of protein.

Answers

Answer: 8.7 grams

A single ounce of pretzels has 2.9 grams of protein. All you need to do is times it by 3
The answer is 8.7 I think

PLEASE HELP ME I NEED THIS NOW I WILL GIVE BRAINLIEST TO WHO EVER ANSWERS FIRST

Answers

It would be D 2 1/2 because when you divide 54 in 12 you get 4.5 and 4 is 12 so then you add 12 4 crime you get 2 days then the .5 is 1/2

Patty can make 10 purses in 8 hours. At this rate, how many purses can she make in 28 hours? ​

Answers

Answer:

35 purses

Step-by-step explanation:

Set up a proportion, where x is the number of purses she can make in 28 hours:

[tex]\frac{10}{8}[/tex] = [tex]\frac{x}{28}[/tex]

Cross multiply and solve for x:

8x = 280

x = 35

So, in 28 hours, she can make 35 purses

Answer:

35

Step-by-step explanation:

What is the value of x in the equation x3=27/125 ?




81/375


9/42


3/25


3/5

Answers

Answer:

3/5

Step-by-step explanation:

3/5 is the answer to your question

Ples helpe me its math

Answers

Answer: 22/12 = 11/6

Step-by-step explanation:

Again Lol ima copy and paste my same answer.

Hey there!

Let's write this as a ratio/proportion.

The sum of this basic ratio is 4.25.

To figure out how much of each we have for 34, we divide this 34 by 4.25, our sum of the two ingredients. This will give us a factor we can multiply our two ingredient measurements by.

34/4.25=8

Now, we multiply our two ingredients by eight.

2.75(8)=22

1.5(8)=12

Note that these two add up to make 34 tablespoons.

Therefore, we have...

22 tablespoons of olive oil and 12 tablespoons of balsamic vinegar were used in the 34 tablespoons of bread dip.

I hope this helps! Have a great day! :)

A snake dives toward deeper water at a rate of 10 inches per second. If the snake continues at this speed for 7 seconds, which expression represents this situation?

A. 7(−10)
B. −7(−10)
C. 7÷10
D. 7÷(−10)

Answers

Answer:

A

Step-by-step explanation:

The snake is diving deeper, meaning it is going below the surface which is represented by - numbers... time is never negative, therefore the answer can not be B.

C hope that can help you out

Would you times it by 4 since it’s 4 sides??

Answers

Yes you would multiply it by 4 bc it has 4 sides
I think its 32 not sure though

4/h = 2 ...................

Answers

Answer:

h=2

Step-by-step explanation:

4/2 =2/1=2

Answer:

2

Step-by-step explanation:

Show that you get the same prime factorization of 120 whether you begin with 120 = 2 × 60 or with 120 = 10 × 12.

Answers

Answer:

2 -> 2

60 -> 5 x 3 x 2 x 2

120 -> 5 x 3 x 2 x 2 x 2

10 -> 2 x 5

12 -> 3 x 2 x 2

120 -> 5 x 3 x 2 x 2 x 2

Step-by-step explanation:

Good luck ;)

HI HOPE THIS HELPS oop caps

2 = 2

60  = 5 x 3 x 2 x 2

120  = 5 x 3 x 2 x 2 x 2

10  = 2 x 5

12  = 3 x 2 x 2

120  = 5 x 3 x 2 x 2 x 2

Overestimate the grocery bill with items that cost: $8.56, $5.34, $34.25, and $6.80.

A.$56.00

B.$58.00

C.$57.00

D.$55.00

PLEASE HELP ME I BEG YOU

Answers

Well if you had up all the answers you get $54.95 so choose 55
A hope that can help you out

One side of a cube is 5 cm long. What is the cube's volume?

Answers

Answer : 125

Step-by-step explanation:

Cube

Solve for volume

V=125cm³

Answer:

125 cm^3

Step-by-step explanation:

5^3 = 125 cm^3

Please answer all questions, will also give brainiest.

Answers

1) 5 cups of yellow paint; because if 10 cups of yellow paint are used for 2 cups of blue paint, then you would use 5 cups of yellow paint to even out the pigment of one cup of blue.
2) 3 cups of blue paint, and 15 cups of yellow paint
3) 5 cups of yellow for every cup of blue paint
4) for every cup of blue paint 5 cups of yellow are used to get the same shade of green

1. 5 cups of yellow paint

2. 3 cups of blue paint 15 cups of yellow paint

3. 5 cups of yellow

4. for every cup of blue paint 5 cups of yellow are used

sry if wrong

Refer to the above model. What processes are occurring along arrows D and E to turn both sedimentary rocks and igneous rocks into metamorphic rocks?

A. melting and cooling

B. erosion and deposition

C. high temperatures and cementation

D. extreme heat and pressure

Answers

D - extreme heat and pressure

In order for a rock to be transformed and metamorphic, it has to experience extreme heat and pressure, which is what is being shown in the diagram.

I bet you $13456324567 dollars you didn't read that number. You just skipped right over it. You didn't realize I put a letter in it. No I didn't but you went back and looked.

Answers

Answer:

i did both

Step-by-step explanation:

I did too lol I read everything and I went bk

What form is the equation below written in?

Answers

Answer:

Slope intercept

The answer is: a Slope intercept

Please help me on this IXL it's S.10 in Algebra.

Answers

Subtract and divide them together
Choose one of the numbers from the f(x) then find the one that is equal to it on the left side “x” and right the x or the number you chose on the first box and on the second choose the equivalent factor

________ is measured in units of distance per unit of time.

Question 2 options:

Velocity


Speed


Force


Distance

Answers

Answer:

Speed

Step-by-step explanation:

S=d/t

WHATS 1+1+ 6454873648768746832476387067367386378826846643737?

Answers

6272626526272727272828272626262626262625335628188 am I right?

(-4/5) X - 5 = -35
Can Someone solve for X

Answers

Answer:

x= [tex]\frac{72}{2}[/tex]

Step-by-step explanation:

Jake is working on different patterns found in his math journal. He begins evaluating the problems below: 0.236 x 101 = 2.36 0.236 x 102 = 23.6 0.236 x 103 = 236 By what power of 10 would Jake multiply 0.236 to get the product of 2,360,000?

Answers

Answer:

7

Step-by-step explanation:

0.236 x 10^7 = 2360000

PLES HELP ME!!!!!!!!!!!!!!!!!!!! I NEED HELP ASAP

Answers

Answer:A 1.0

Step-by-step explanation:

Help me find the slope Plz show steps i’m confused.

Answers

Can you send me the page I cant see

I don't see anything

I would help but I don't see any papers

sorry forgot to add the answers
If a piece of ribbon is 4 and 3 over 4. feet long, how long is it in inches?

48 inches
57 inches
60 inches
62 inches

Answers

Answer:

57

Step-by-step explanation:

just trust me i know it i did the math

4 ¾ feet = 4 × 4 + 6 / 4

4 ¾ feet = 19/4 feet

1 foot = 12 inches

Then , 19/4 feet = 19/4 × 12 inches

= 19/4 × 12

= 19 × 12 / 4

= 228/4 inches

= Both the numerator and denominator are divisible by 4 .

Hence ,

= 228 ÷ 4 / 4 ÷ 4

= 57/1

= 57 inches

Therefore , a piece of ribbon which is 4 ¾ feet long in inches :

57 inches

help mewa plzzzzzzzz

Answers

Answer:

It has the same shape and angels as a trapezoid therefor it is a trapezoid

Step-by-step explanation: If u dont believe me, look for a pic of a trapezoid on google

Shelly buys a desk to sell in her shop. She marks the price up by 35% and sells the desk for $290.25. What price did Shelly pay for the desk? Please explain

Answers

Answer:

835.00 dollars.

Step-by-step explanation:

i add 485 to 350. because the word more means to add.

Answer:

835.00 dollars.

Step-by-step explanation:

i add 485 to 350. because the word more means to add.

4(b+1) ≤ 2(2b+1)+1
Is this equation no solution?
Very important

Answers

Answer:

it does not have a solution

Step-by-step explanation:

4(b + 1) ≤ 2(2b + 1)+1

4b + 4 ≤ 4b + 2 + 1

0 ≤ -1

0 isn't less than or equal to -1

Yea he is right it doesn’t have solutions
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