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
klasskru [66]
2 years ago
13

1. Which of the following values of n will make the below equation true? n × (−2+5 ) = −8+20

Mathematics
1 answer:
Salsk061 [2.6K]2 years ago
7 0

Answer:

1a 2a

Step-by-step explanation:

n × (−2+5 ) = −8+20

n × 3 = 12

n = 4

2 + (n+6) = −1+6

n + 8 = 5

n = -3

You might be interested in
Half the sum of 4 consecutive integers is 53 what are the integers?
Sphinxa [80]

Answer:

25,26,27, and 28

Step-by-step explanation:

Write consecutive integers as x,x+1,x+2,x+3,x+4, and so forth.

x+x+1+x+2+x+3

----------------------       =   53

          2

1) Combine alike terms:

4x+6

-------   =    53

  2

2) Multiply both sides by 2:

4x+6=106

3) Subtract 6 from both sides:

4x=100

4) Divide both sides by 4:

x=25

5) Plug in 25 for x for all 4 integers:

25

26

27

28

6 0
3 years ago
Z^m-n (z^m+ z^m+n + z^n)
rusak2 [61]

Answer:Your left hand side evaluates to:

m+(−1)mn+(−1)m+(−1)mnp

and your right hand side evaluates to:

m+(−1)mn+(−1)m+np

After eliminating the common terms:

m+(−1)mn from both sides, we are left with showing:

(−1)m+(−1)mnp=(−1)m+np

If p=0, both sides are clearly equal, so assume p≠0, and we can (by cancellation) simply prove:

(−1)(−1)mn=(−1)n.

It should be clear that if m is even, we have equality (both sides are (−1)n), so we are down to the case where m is odd. In this case:

(−1)(−1)mn=(−1)−n=1(−1)n

Multiplying both sides by (−1)n then yields:

1=(−1)2n=[(−1)n]2 which is always true, no matter what n is

8 0
3 years ago
Julia has 3 ribbons that are 12 inches each. how many 4 inch sections can she cut from the ribbon.
Ber [7]
Total length of all ribbons = 12 * 3 = 36 inch

Then, number of ribbons = 36/4 = 9

In short, Your Answer would be: 9 sections

Hope this helps!
6 0
3 years ago
ALOT OF POINT NEED HELP QUICK AND FAST
Finger [1]

Answer:

A true

B false

C false

D true

5 0
3 years ago
The speed of the current is 7 mph. The boat travels three times slower against the current than with the current. What is the sp
svlad2 [7]
Let
x--------> <span>the speed of the boat in mph

we know that
</span>going upstream the speed is x-7 
<span>going downstream the speed is x+7 
</span>
let the distance be d 
<span>time to go upstream = d/(x-7) </span>
<span>time to go downstream = d/(x+7)
</span>
time going upstream is 3 times going downstream 
so
<span>3d/(x+7) = d/(x-7) </span>
<span>divide by d </span>
<span>3/(x+7) = 1/(x-7) </span>
<span>3x-21 = x+7 </span>
<span>2x = 28 </span>
<span>x = 14 
</span>
the answer is
<span>the speed of the boat in still water is 14 mph</span>
7 0
3 years ago
Other questions:
  • What is the y-intercept of <br><br> 10/-5
    6·1 answer
  • Multiply and simplify: –3x2y2 • y4x3
    10·2 answers
  • PLEASE I REALLY NEED HELP
    8·1 answer
  • I need help ASAP PLEASE SOLVE
    8·1 answer
  • PLEASE HELP PICTURE SHOWN!!
    13·1 answer
  • The length of a rectangle is 2 more than its width. If the area of the rectangle is 20m squared, what are the dimensions of the
    9·1 answer
  • How many solutions are there for the system of equations shown on the graph?
    15·2 answers
  • If 3/4 of an inch on a map is equal to 45 miles , what does 1 inch represent?
    6·1 answer
  • How do I solve this problem. 7a+2=3a+1
    10·2 answers
  • 0.36 divided by 2.34
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!