Answer: y=x+2 or x-10
Step-by-step explanation:
Y=x2-8x-20
Quadratic equation
Variables of -20 that will give -8 are
-10 &+2
Substitute into the equation
Y=x2-10x+2x-20
Y=x(x-10)+2(x-10)
Y=(x+2)(x-10)
The two equations are
Y=x+2 or
Y=x-10
So first y = 3.50 + 15 = 18.5
Next 2x + y = -1.5
2x = -1.5 -y
2x = -1.5 - 18.5 = -20
x = -20/2 = -10
So
x = -10
y = 18.5
Answer:
15 Years or 14.5 Years
Step-by-step explanation:
According to the Question,
- Given That, Cora invests $1000 at Rate of 5% Per Annum. Interest is compounded semi-annually, After What time her money to get double.
- We Know, the formula A=P(1+r/n)^(nt) (where r=0.05 , p=1000 , A=2000 , n=2)
Put the Given value in Formula, We get
2000 = 1000 (1 + 0.05/2) ^ 2t
2 = (1+0.025)^2t
2 = (1.025)^2t ⇔ 1.025^30 = 2.0975 ≈ 2
Thus, 2t = 30 ⇒ t = 15 Years
OR
2 = (1.025)^2t ⇔ 1.025^29 = 2.0464 ≈ 2
Thus, 2t = 29 ⇒ t = 14.5 Years
2,793 57x48 2,793 hope this helps
First: solve the expressions
(a) 11-(6+3)= 11-9= 2
(b) (8-2)-3= 6-3=2
(c) 12-(5-4)=12-1=11
Next: plug them in to the choices
a. (2)+(2)=11 (this is not true so this is wrong)
b. (11)-(2)<2 (this is not true so it is wrong)
c. (2)>(11) (this is not true so this is wrong)
d. (11)>(2)+(2) (this is true so this is your answer)
your answer is D... Hope this helps :)