1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nastasia [14]
2 years ago
9

The sum of an unknown and eight is twenty. What is the unknown?​

Mathematics
2 answers:
gregori [183]2 years ago
7 0

Answer:

12

Step-by-step explanation:

We can transform this into an equation in which the unknown will be represented by x. The word "sum" shows us that we are using addition, and we already know that we are adding 8 to the unknown (or x) and the answer to the equation is 20. Lets put this into a number equation now.

x+8=20

Now we just undo the equation. We have to subtract 8 from both sides.

x+8(-8)=20(-8)

x=12

The answer is 12. :) have a good day!

Zarrin [17]2 years ago
4 0

indicates subtraction

20 - 8 = 12

You might be interested in
When a product is raised to a power, it is equal to the product of each factor raised to that power. Show that this rule does no
maks197457 [2]
<span>Exponential notation is an easier way to write a number as a product of many factors. ... Any number (except 0) raised to the zero power is equal to 1. 1490 = 1.</span>
3 0
3 years ago
A computer software retailer used a mark up of 150%. Find the cost of the computer
cluponka [151]

The selling price of the computer is $35.

4 0
2 years ago
A professional volleyball player can jump an average of 2.5 times higher than the average person. If an average person can jump
Eva8 [605]
The answer is B, 2.5x
2.5 is the average of how many times higher they can jump and x is the average person
8 0
3 years ago
Pls help me !! will mark brainliest... i just need you to solve for m&lt;1 and m&lt;7 !! thanks !!
frez [133]

Step-by-step explanation:

=( n-2)180

= ( 4 - 2 )180

= 360

So, 144 + 90 + m<2 +m<1 = 360

144 + 90 + 85 + m<1 = 360

319 + m<1 = 360

m<1 = 360 - 319

m<1 = 41

their is an unknown angle so let's call it x

let's find x first ( m<6=49)

x + m<6 = 180

x + 49 = 180

x = 180 - 49

x = 131

Now let's find m<7

m<7 + 38 + m<4 + x = 360

m<7 + 38 + 85 + 131 = 360

m<7 + 254 = 360

m<7 = 360 - 254

m< 7 = 106

8 0
3 years ago
How many megabytes of data can a 4.7 gigabyte dvd store?
dedylja [7]
The answer is 4700 megabytes.

1 giga = 1000 mega

1 gigabyte = 1000 megabyte
4.7 gigabyte = x megabyte

1 gb : 1000 mb = 4.7 gb : x
x = 1000 mb * 4.7 gb : 1 gb
x = 4700 mb 
3 0
2 years ago
Other questions:
  • The cake store is having a 50\%50%50, percent off sale on all of its cakes. If the cake you want regularly costs \$14$14dollar s
    7·1 answer
  • Find the center and the radius of the circle with the equation:
    11·1 answer
  • someone please help!! i need to turn this in asap and i'm very behind in school and need help with this graph! What is the y-int
    10·1 answer
  • Use the quadratic polynomial x2+x−12 to answer the questions. A: Which summary correctly applies the Fundamental Theorem of Alge
    11·1 answer
  • Can someone please help?
    9·1 answer
  • HELPPPP I need help with this question!!!!
    6·1 answer
  • Just help me please lol
    8·1 answer
  • Kevin and Sam each have a map with the following instructions:
    5·1 answer
  • Help me quick I’m stuck
    5·1 answer
  • When a shape is dilated, the _________ of the lengths in the image to the corresponding lengths in the pre-image are equal to th
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!