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
charle [14.2K]
3 years ago
12

The sum of a number and -20 is 40.What is the number?

Mathematics
1 answer:
Reika [66]3 years ago
3 0

sum means addition

 so x +-20 = 40

x = 40 +20 = 60

x=60


You might be interested in
Tim wants to collect 400 stickers. if he makes pages of 10, how will he know when he has 400 stickers?
s2008m [1.1K]
There will be 40 stickers on each page
3 0
3 years ago
Read 2 more answers
Help ne with this math
stira [4]

The answer is A,E,G,L,D,and H.

You can check this by doing this:

This is for A

16*4=84

12*7=64

84+64=148

6 0
3 years ago
The graph shows the cost for each video game rental. What does the rate of change represent in this situation? Select from the
ludmilkaskok [199]
<span>The line in the chart in slope intercept form has the equation

   y = 25x + 50

       Since x is the number of days and y is the total cost, it looks like the rental cost is a linear function of the number of days you've rented the game. So the most logical response is that the rate of change represents "daily rate for renting the game"

       Since the actual options from the "drop-down menu" weren't provided, you'll have to select the choice that most closely matches the intent of "daily rate for renting the game"</span>
3 0
3 years ago
The half-life of iron-52 is approximately 8.3 hours.How much of a 13 gram sample of iron-52 would remain after 8 hours? Round to
Alexandra [31]

6.665 grams of the 13 grams remain after 8 hours.

<h3>How much of a 13 gram sample of iron-52 would remain after 8 hours?</h3>

The decay equation for the 13 grams of iron-52 is:

N(t) = 13g*e^{(-ln(2)/8.3h)*t}}

Where N is the amount of iron-52, and t is the time in years.

Where we used the fact that the half-life is exactly 8.3 hours.

Now, the amount that is left is given by N(8h), so we just need to replace the variable t by by 8 hours, so we get:

N(8h) = 13g*e^{(-ln(2)/8.3h)*8h}} = 6.665g

So 6.665 grams of the 13 grams remain after 8 hours.

If you want to learn more about half-life:

brainly.com/question/11152793

#SPJ1

5 0
1 year ago
How to rewrite each expression as a single power
gladu [14]

Answer:

If two powers have the same base then we can multiply the powers. When we multiply two powers we add their exponents.

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Kellen​'s boat travels 15 mph. find the rate of the river current if she can travel 2 mi upstream in the same amount of time she
    6·2 answers
  • HELPP
    7·1 answer
  • The velocity of the current in a river is C = 0.6i + 0.8j km/hr. A boat moves relative to the water with velocity v=7i km/hr. a.
    15·1 answer
  • Factor c^3+64?? Help me
    13·1 answer
  • Jacob brought 6 3/4 carrot cakes to share with the 26 students in his class did Jacob bring enough for each students to have 1/4
    8·1 answer
  • One of the solutions to x2 − 2x − 15 = 0 is x = −3. What is the other solution?
    6·2 answers
  • A right circular cone has a radius of 8 in. and a slant height of 12 in. These dimensions are multiplied by 6. By what factor is
    12·1 answer
  • A piece of lead for a mechanical pencil is 3.15 × 10–4 meter in diameter.
    10·2 answers
  • Hi! Could you help me?? I’m stuck on this one
    10·2 answers
  • A person decides to build a horse corral using a barn for one side. Has has 30m of fencing materials and wants the corral to hav
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!