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
Diano4ka-milaya [45]
3 years ago
8

Can someone solve this: a = 21+(-4)

Mathematics
2 answers:
Alenkasestr [34]3 years ago
5 0

Answer:

17

Step-by-step explanation:

igor_vitrenko [27]3 years ago
3 0

Answer:

a=17

Step-by-step explanation:

When an equation says +(-) like this one, all you have to do is subtract :)

Knowing that if you rewrite this you get a= 21-4, which is 17!

I hope this helps, and have a great day! <3 :D

You might be interested in
the walls of a square room need painting.Each of the four walls is 12 ft wide by 8.5 feet tall.One gallon of paint covers 75 ft.
Jobisdone [24]
First find the area of each wall. This is length*width which would be 12*8.5=102. There are four walls in the room because it’s a square so that would be 102*4=408. So the total area you need to paint is 408ft one gallon will cover 75ft so 408/75=5.44 gallons of paint.
6 0
3 years ago
Read 2 more answers
To finance her community college education, Sarah takes out a loan for $3700. After a year Sarah decides to pay off the interest
ASHA 777 [7]
I believe it is $3,478
8 0
3 years ago
30r + –20 = 760 r = _____
andrey2020 [161]

Answer:

r = <u>26</u>

Step-by-step explanation:

30r+(-20)=760\\30r-20=760\\30r=780\\r=26

6 0
3 years ago
Read 2 more answers
Express in scientific information notation 417.8
bogdanovich [222]

Answer:

4.178×10 to the second power

Step-by-step explanation:

Move the decimal twice to the Left

5 0
3 years ago
Read 2 more answers
Evidence of a chemical reaction includes anything that shows -
puteri [66]

Answer:

a change in the state of matter

Step-by-step explanation:

6 0
4 years ago
Other questions:
  • Ax4=4 help help help
    15·2 answers
  • Order the group of quadratic functions from widest to narrowest graph.
    6·2 answers
  • This is easy but I forgot how to solve unit rate plz help and show work number 1
    7·1 answer
  • a baker made 5 pounds of icing. he used 4/9 of icing to decorate cakes. how much of the icing is left over?
    14·2 answers
  • Help Awnser Correctly Please
    9·1 answer
  • The daily production cost, C, for x units is modeled by the equation: C = 200 – 7x + 0.345x2 Explain how to find the domain and
    10·1 answer
  • A substance is followed by the symbol (1) in a chemical equation. What does the symbol represent?
    11·1 answer
  • What is the intersection of y=-x+8
    10·2 answers
  • Divide and answer in simplest form 8 5/2 =?
    15·1 answer
  • Maya's chocolate bar is 29% cocoa. If the weight of the chocolate bar is 67 grams, how many grams of cocoa does it contain? Roun
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!