Answer:
x=12
Step-by-step explanation:
If the triangles are similar:
x/8=18/12
x/8=1.5
x=12
Answer: $2294 should be invested in the simple interest account while $4588 should be invested in the certificate of deposit.
Step-by-step explanation:
Let x represent the amount that he would deposit in the simple interest account.
Let y represent the amount that he would deposit in the certificate of deposit.
she will deposit twice as much in the certificate of deposit. It means that
y = 2x
Interest from the simple interest account would be 7%. This mean that the interest would be 7/100 × x = $0.07x
Interest from the certificate of deposit account would be 5%. This mean that the interest would be 5/100 × y = $0.05y.
The total interest from both accounts would be $390. It means that
0.07x + 0.05y = 390- - - - - - - - - - 1
Substituting y = 2x into equation 1, it becomes
0.07x + 0.05 × 2x = 390
0.07x + 0.1x = 390
0.17x = 390
x = 390/0.17 = $2294
y = 2x = 2 × 2294
y = 4588
Answer:
D.
(The only option that makes sense is D. but I came up with 10°F when I did the math)
<u><em>~ LadyBrain</em></u>
Answer:
It's C! 75%
Step-by-step explanation:
Answer:
Step-by-step explanation:
Add 9x to both sides:
Simplify:
Solve with the quadratic formula:
For a quadratic equation of the form 
the solutions are:
For 
The solution to the quadratic equation are:
Hope I helped. If so, may I get brainliest and a thanks?
Thank you, have a good day!
