1-2+3-4+5-6+..+99-100.
Answers
So you want to pair them up
(1-2)+(3-4)+(5-6)..+(99-100)
And write the answer for each pair
(-1)+(-1)+(-1)..+(-1)
When looking at this you can see that each pair equals -1
So you divide 100 by 2 and multiply that by the -1
100/2=50
50*-1=-50
Answer is 50
You would use the same method if you were going up to a number like a 500
The answer would be -250
Related Questions
A quality-control center finds that 2 out of 250 toy trains are defective. How many trains would they expect to be defective in a batch of 10,000?A. 250 B. 125 C. 80 D. 40
Simply the exponent X^4/x^7
Show work 14.7 x 11.361=
7:30, 7:55, 8:20,...
solve equation using the distributive property
Answers
3+ 9r= 12
Minus 3 from both sides
9r= 9
Divided 9 from both sides
R= 1
Check
9(1/3+1) = 12
Hope this help!!
(1 pt)
What is the area of the rectangle?
A.
0.9416 mi²
B.
1.8832 mi²
C.
1.95 mi²
D.
3.90 mi²
2.
(1 pt)
What is the area of the rectangle?
A.
40 km2
B.
40 m2
C.
26 km2
D.
26 m2
3.
(1 pt)
What is the area of the rectangle?
A.
1.125 yd²
B.
2.250 yd²
C.
4.50 yd²
D.
11.25 yd²
4.
(1 pt)
What is the area of a rectangular playground with a length of 84.5 ft and a width of 53 ft?
A.
137.5 ft²
B.
275 ft²
C.
4478.5 ft²
D.
44,785 ft²
5.
(1 pt)
Which measurement is the closest approximation of the rectangle’s area?
A.
16 m²
B.
32 m²
C.
65 m²
D.
70 m²
Answers
There are no dimensions available here, so i have no idea what the questions are talking about.
but i can help u with 4.
so multiply 84.5 * 53, that equals 4,478.5
A. Peter’s Age × One Twin’s Age = Total Candles Needed
B. Peter’s Age + One Twin’s Age = Total Candles Needed
C. Number of Candles in a Typical Box – Peter’s Age = Candles Needed
D. Peter’s Age + Two Times One Twin’s Age = Total Candles Needed
Answers
Answer:
D. Peter’s Age + Two Times One Twin’s Age = Total Candles Needed
Answers
The answer to this is 10 and 5
Answers
Answer:
21378.6
Step-by-step explanation:
Since the exponent is positive move to the right.
2_1_3_7_8.6