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
Gwar [14]
3 years ago
8

2. (-9 + 12) - (-7) ​

Mathematics
2 answers:
julia-pushkina [17]3 years ago
6 0

Answer:

Step-by-step explanation:

(-9 + 12) - (-7) = 4 -(-7)

                    = 4 + 7

                   = 11

Sign of 9 is (-)

Sign of 12 is +. So subtract and the answer will have the sign of bigger number

12 - 9 = 4 and bigger number is 12 and sign of 12 is +.so +4

Aleonysh [2.5K]3 years ago
3 0

Answer:

(-9+12)=3

3-(-7)=

3+7

ans=10

You might be interested in
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. In the equation√n+5
Yuki888 [10]

Answer:

n = 59

Step-by-step explanation:

The given equation of n is \sqrt{n + 5} - \sqrt{n - 10} = 1 and we have to solve it for n.

\sqrt{n + 5} - \sqrt{n - 10} = 1 ........... (1)

⇒ \frac{(n + 5) - (n - 10)}{\sqrt{n + 5} + \sqrt{n - 10}} = 1  

{Rationalizing the numerator}

⇒ \sqrt{n + 5} + \sqrt{n - 10} = 15 .............. (2)

Now, adding (1) and (2) we get

2\sqrt{n + 5} = 16

⇒ n + 5 = 64 {Squaring both sides}

⇒ n = 59 (Answer)

4 0
3 years ago
[5x+6]*{(3%*5.0x)*5(7*8c)}
Diano4ka-milaya [45]

Answer:

210x²c+252xc

Step-by-step explanation:

3 0
3 years ago
An account earns simple interest. $1675 at 4.6% for 4 years a. Find the interest earned. $___ b. Find the balance of the account
Colt1911 [192]
A. First, divide 1675 by 100 to find 1% of it. 
1675 / 100 = 16.75 
Then, multiply 16.75 by 4.6 to get 4.6%. 
16.75 x 4.6 = 77.05 
77.05 is the interest for one year. 
Multiply it by 4 to get the interest for 4 years. 
77.05 x 4 = 308.20 
The interest earned is $308.20. 

B. Add the interest to the original balance to get the total. 
308.20 + 1675 = 1983.20 
The balance of the account is $1983.20 after 4 years. 

Hope this help!
7 0
3 years ago
Eight children are divided into two teams each containing 4 children. how many different divisions are possible?
Alekssandra [29.7K]
So this is what's known as a combination. a combination is a group where the order does not matter. to solve a combination, you use this equation:
n! / (r! *(n-r)!) 
n is the total number of objects being sorted (8)
r is the group you need to sort them into (4)
(i know it's 2 groups of 4 but if you solve this for 1 group, the other group is automatically made of the remaining kids)
definition of !:
a number with a ! means 1*2*3...*that number (so that number multiplied by every number smaller than it all the way to one)

so we put 8 and 4 in this equation:
8! / (4! *(8-4)!) 
simplify:
8! / *(4! 4!) 
multiply out:
(8*7*6*5*4*3*2*1) / (4*3*2*1 * 4*3*2*1)
and put that in your calculator
you will get 70
your answer is 70
4 0
4 years ago
If the measure of an angle is 13°, find the measure of its supplement.
aliya0001 [1]
Supplement mean the angle equals 180 degrees .
so 180-13
the other supplement equals 167
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following statements is NOT true regarding an expression written in scientific notation in teh form of a x 10^n?
    11·2 answers
  • Earth's diameter at the equator is 7,926
    13·2 answers
  • What is the the equation for the line that has a slope of 0 and passes through the point (3,7)
    5·1 answer
  • Find the value of this expression if x= 3 x^2+4/x
    11·1 answer
  • What is the multiplicative identity matrix? What is it similar to in the set of real numbers? Explain your answer
    5·1 answer
  • Which value is a solution of the equation 5 - 4x=-3
    9·1 answer
  • What does 0 = 0 indicate about the solutions of the system?
    7·1 answer
  • PLZ ANSWERW THE QUESTION BELOW
    11·1 answer
  • Mr Fowler’s science class
    10·1 answer
  • Decrease 54 litres in the ratio 5:1​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!