1985year ->275cell phones->100%
1994year -> x cell phones ->100%+360%
40% • (1994-1985)= 40% • 9= 360%
275 cell phone 100%
X cell phones. 100+360%=460%
x=275•460%/100%
x=12420/100
x=1265
99% sure this is a correct answer
x=275 • 460%/100%
x=12,420/100
x=1265
1994-1985= 9 yrs • 40%= 360%
Answer:
Convert
3
1
4
to an improper fraction.
A mixed number is an addition of its whole and fractional parts.
3
+
1
4
−
1
3
4
Add
3
and
1
4
To write
3
as a fraction with a common denominator, multiply by
4
4
.
3
⋅
4
4
+
1
4
−
1
3
4
Combine
3
and
4
4
.
3
⋅
4
4
+
1
4
−
1
3
4
Combine the numerators over the common denominator.
3
⋅
4
+
1
4
−
1
3
4
Simplify the numerator.
Multiply
3
by
4
.
12
+
1
4
−
1
3
4
Add
12
and
1
.
13
4
−
1
3
4
Convert
1
3
4
to an improper fraction.
A mixed number is an addition of its whole and fractional parts.
13
4
−
(
1
+
3
4
)
Add
1
and
3
4
.
13
4
−
7
4
Combine the numerators over the common denominator.
13
−
7
4
Subtract
7
from
13
.
6
4
Cancel the common factor of
6
and
4
.
Factor
2
out of
6
.
2
(
3
)
4
Cancel the common factors.
Factor
2
out of
4
.
2
⋅
3
2
⋅
2
Cancel the common factor.
2
⋅
3
2
⋅
2
Rewrite the expression.
3
2
The result can be shown in multiple forms.
Exact Form:
3
2
Decimal Form:
1.5
Mixed Number Form:
1
1
2
Step-by-step explanation:
Answer:
A, B, and D.
Step-by-step explanation:
HEY!! remember that if a number has ^2, it basically means it's multiplied by itself. for example:
5^2 = 5 x 5
aka, 25.
You can use this to check each of the answers in your formula, like this:
if x=6, then:
x^2 < 100
6 x 6 = 36
36 < 100
A is one of your correct answers!
Also remember, if you multiply a negative by a negative, it becomes positive.
-5 x -5 = 25
-10 x -10 = 100
Answer:
378 marbles are blue, and 270 marbles are red
Step-by-step explanation:
The total number of ratio units must be multiplied by 6 to get the total number of marbles. Hence the number of blue marbles is 63×6 = 378, and the number of red marbles is 45×6 = 270.
1. Decompose all numbers into prime factors
300 2 150 2 75 3 25 5 5 5 1 400 2 200 2 100 2 50 2 25 5 5 5 1 500 2 250 2 125 5 25 5 5 5 1
2. Write all numbers as the product of its prime factors
Prime factors of 300 = 22 . 3 . 52
Prime factors of 400 = 24 . 52
Prime factors of 500 = 22 . 53
3. Choose the common and uncommon prime factors with the greatest exponent
Common prime factors: 2 , 5
Common prime factors with the greatest exponent: 24, 53
Uncommon prime factors: 3
Uncommon prime factors with the greatest exponent: 31
4. Calculate the Least Common Multiple or LCM
Remember, to find the LCM of several numbers you must multiply the common and uncommon prime factors with the greatest exponent of those numbers.
LCM = 24. 53. 31 = 6000
