The correct answer is:
[C]: "

" .
____________________________________________________Explanation:____________________________________________________Given:
____________________________________________________ 2 / (9x) = 4 / 7 ; solve for "x" ;
____________________________________________________Cross-multiply:
→ (9x)*4 = 2 * 7 ;
→ 36x = 14 ;
Divide each side of the equation by "36" ;
to isolate "x" on one side of the equation; & to solve for "x" ;
→ 36x / 36 = 14 / 36 ;
x = 14/ 36 ;
→ x = 14/36 = (14÷2) / (36÷2) = 7/18 ;
______________________________________________________
The answer is: "

" ;
→ which is:
Answer choice: [C]: "

" .
______________________________________________________
Answer:
The number of nickels is 45 and the number of dimes is 72.
Step-by-step explanation:
Let
x ----> number of nickels
y ----> number of dimes
Remember that


so
------> equation A

------> equation B
<em>Solve the system by substitution</em>
we have
------> equation A
------> equation B
Multiply both equations by 100 both sides
---->
--> equation C
----> equation D
substitute equation C in equation D

solve for y




Find the value of x




<em>Alternative Method</em>
Solve the system by graphing
Remember that the solution is the intersection point both graphs
using a graphing tool
the solution is the point (45,72)
therefore
The number of nickels is 45 and the number of dimes is 72.
Answer:
Can you add a picture or visual model if there is one?
Step-by-step explanation:
Answer:
Step-by-step explanation:
1 grain = 6×10⁻⁶ g
- 7200 kg =
- 7200000 g =
- 7.2×10⁶ g =
- 7.2×10⁶ ÷ 6×10⁻⁶ =
- (7.2÷6)×10⁶⁻ ⁽⁻⁶⁾ =
- 1.2×10¹² grains
Answer: Independent
Step-by-step explanation: Just multiply the probability of the first event by the second.