Answer:
20
Step-by-step explanation:
Given function f(x)=![\[x^{2}-x\]](https://tex.z-dn.net/?f=%5C%5Bx%5E%7B2%7D-x%5C%5D)
We need to find f(-4) which means we need to find the value of the function when x=-4
.
On substituting x=-4 in the given function:
f(-4)=![\[-4^{2}-(-4)\]](https://tex.z-dn.net/?f=%5C%5B-4%5E%7B2%7D-%28-4%29%5C%5D)
Square of -4 is 16.
Hence, f(-4)=![\[16+4\]](https://tex.z-dn.net/?f=%5C%5B16%2B4%5C%5D)
=
Hence the value of the given function f(x)=
when x=-4 is 20.
Answer:
-8
Step-by-step explanation:
we have from the statement:
BC
B = -4
C = 2.
we need to multiply B and C
B*C=(-4)*(2)
we have
B*C=-8
The answer is -8
Answer:
After 59 months the new dryer will pay for itself.
Step-by-step explanation:
Let the new clothes dryer takes 'x' months to pay for itself.
Then the operating cost of the new dryer will be = 15x
Since cost of the new dryer = $590
So, total cost of the dryer in x months = $(590 + 15x)
Now we know old dryer's operating cost is = $25 per month
So, operating cost for x months = 25x
By the time when new dryer's total cost becomes equal to the old dryer's operational cost, the new dryer will pay for itself.
Now we can get the value of x by equating the old dryer's operational cost and the new dryer's total cost.
25x = 590 + 15x
25x - 15x = 590
10x = 590
x = 
x = '59 months'
2.4 because 4.8/2 is 2.4. 14.4/4 is also 2.4. Constant of variation is the unit rate
Answer:
4 times
Step-by-step explanation:
Sample space :
6 sided cube = (1, 2, 3, 4, 5, 6)
Coin = (H, T)
Probability = required outcome / Total possible outcomes
Probability of head (H) = P(H) = 1 /2 = 0.5
Probability of 3 = P(3) = 1 /6 = 0.166666
Probability of heads and 3 on a single try = p(H) * p(3) = 0.5 * 0.166666 = 0.083333
Hence, expected number of times this is likely to occur in 48 tries :
0.083333 * 48 = 4