Answer:
-131
Step-by-step explanation:
first distribute the 3
(5(3)+ 73(3))- 365
5(3)= 15
73(3)= 219
now add 219+ 15
219+15=234
now subtract 234 and 365
234- 365= -131
M = 16
16 = 4B
B = 4
(M - B) = 12 <== this will never change. Mary will always be 12 yrs older than he is.
So, when she is twice as old as he is, he is 12 and <u>she is 24</u>.
That will occur in 8 years from now.
They should live long and prosper.
Hello,
To solve this function for f(4) we need to plug 4 into f(x) and the result will be our answer. We know that f(x) is
. Plugging in 4 we get
. Therefore, f(4)=41. Hope this helps!
Answer:
400 miles.
Step-by-step explanation:
Gallons used = 16 - 4 = 12 gallons.
Miles driven = 12 / 0.03
= 1200/3
= 400 miles.
We have 55% and 80% antifreeze. We need 90 gallons of 75%.
F - 55% and E - 80%
A) F + E = 90
B) .55 F + .80 E = 67.50 (which is .75 * 90) Multiplying A) by -.55
A) -.55 F -.55 E = -49.50 (which is -.55 * 90) then adding A) & B)
.25 E = 18
E = 72 gallons of 80% and
F = 18 gallons of 55%
********* DOUBLE CHECK ******************
72 * .80 = 57.60 and 18 * .55 = 9.90
57.60 + 9.90 = 67.50 gallons of antifreeze and we have 90 total gallons
(67.50 / 90) * 100 = 75% correct!
Source: 1728.com/mixture.htm
