Answer:
x = 22andx= -10
Step-by-step explanation:
-x ^ 2 + 12x + 220=0
⇒ x = 22 và x = -10
Answer: 120 individual tacos
Step-by-step explanation: So this problem can be represented by the two equations T + E = 300. (T for tacos E for enchiladas) and the equation 2T + 3E = 780. For simplicity I'm going to place these on top of each other.
T + E = 300
2T + 3E = 780
We want to plug one equation into the other so I will solve for E in the first equation.
T - T + E = 300 - T
E = 300 -T
Now we have a value of E that can be plugged into our second equation so let's do that
2T + 3(300 - T) = 780 then we multiply this out.
2T + 900 - 3T = 780
-T + 900 - 900 = 780 - 900
-1 • -T = -120 • -1
T = 120 tacos sold
We can check this by plugging in our values into our equations
300 - 120 = 180 enchiladas sold
2(120) + 3(180) = $780.
Please comment if you have any questions.
I think is 62 but I’m not sure
Answer:
Step-by-step explanation:
7:9
If you have 496 then you'll have 217:279, it adds up to 496.
279-217
62 more
<span>The principal is $1920.96 .
APR 18.6% .
Interest is compounded monthly .
Formula for compound interest is
A = P (1+r/t) ^n(1/t)
P = principal amount (the initial amount you borrow) which is $1920.96
r = annual rate of interest (as a decimal) = 0.186
t = period
A = amount of money accumulated after n years, including interest.
n = number of times the interest is compounded per year = 12 times .
A = P (1+r/t) ^n(1/t)
A = 1920.96*(1+0.186/12)^12(1/12)
= 1920.96(1+1.0155)
= 1951.04
which is the total cost of this purchase.</span>