Answer:
There are 
five dollar bills and 
ten dollar bills.
Step-by-step explanation:
Given:
Selling price of bicycle 
.
The friend gave 
five dollar bills and 
ten dollar bills.
Total number of bills 
.
To find: Number of five dollar bills and ten dollar bills the friend gave.
Solution:
The friend gave five dollar bills and ten dollar bills and the friend gave 
bills in all.
So, 
.
Selling price of bicycle .
So, 
Putting the value of from equation 
in equation 
.
Now, putting the value of in equation .
Hence, there are five dollar bills and ten dollar bills.
I'm sorry but what's the full question?
Answer:
63 sq ft
Step-by-step explanation:
The formula for the area of a trapezoid is
A = h(a + b)/2 where a and b are the lengths of the parallel sides and h is the distance between them
A = 7(11 + 7)/2
= 7(18)/2
= 63 sq ft
Answer:
26 rows
Step-by-step explanation:
this is like a rectangle length×width situation.
seats per row = s
number of rows = r
s × r = 884
s = r + 8
so, we can use e.g. the second equation in the first :
(r + 8) × r = 884
r² + 8r = 884
r² + 8r - 884 = 0
the general solution to such a quadratic equation is
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
x = r
a = 1
b = 8
c = -884
r = (-8 ± sqrt(8² - 4×1×-884))/(2×1) =
= (-8 ± sqrt(64 + 3536))/2 = (-8 ± sqrt(3600))/2 =
= (-8 ± 60)/2 = -4 ± 30
r1 = -4 + 30 = 26
r2 = -4 - 30 = -34
a negative number did not make any sense for the number of rows, so r = 26 is our answer.
Answer:
4/8
Step-by-step explanation:
3/10 is 0.30 and 4/8 is 0.5
