Answer:
Step-by-step explanation:
x + 2y = 8 -----------(I)
x - 2y = -4 -----------(II)
Add equation (I) & (II) and thus y will be eliminated and we can get the value of 'x'
(I) x + 2y = 8
(II) <u>x - 2y = -4</u><u> </u>{Now add}
2x = 4
x = 4/2
x = 2
Substitute x = 2 in equation (I)
2 + 2y = 8
2y = 8 - 2
2y = 6
y = 6/2
y = 3
Answer:
Step-by-step explanation:
To find which one is prime, let's try to factor them all. We can use the factoring by grouping method.
and
and
So this one is not prime, since you can still factor it.
and
and
So this one is not prime, since you can still factor it.
and
and
So this one is not prime, since you can still factor it.
and
and -x+2 cannot be further factored.
Therefore, is a prime.
Answer:
B)
Step-by-step explanation:
10x + 35 = 5x + 40
Answer: The equation is t(n) = 64(0.5)^n.
This is an example of an exponential equation because we are repeatedly multiplying the value by 1/2.
Exponential equation take the form of y = ab^x, where a is the starting amount and b is the rate.
In our case, we are starting with 64 and reducing half (0.5) of the teams each week.
This makes our equation: y = 64(0.5)^x