Answer:
x = -8
Step-by-step explanation:
Solve for x:
-(x + 7)/4 = 1/4
Multiply both sides of -(x + 7)/4 = 1/4 by -4:
(-4 (-(x + 7)))/4 = -1
-4×(-1)/4 = (-4 (-1))/4:
(-4 (-1))/4 (x + 7) = -1
(-4)/4 = (4 (-1))/4 = -1:
--1 (x + 7) = -1
(-1)^2 = 1:
x + 7 = -1
4/4 = (4 (-1))/4 = 1:
x + 7 = -1
Subtract 7 from both sides:
x + (7 - 7) = -7 - 1
7 - 7 = 0:
x = -7 - 1
-7 - 1 = -8:
Answer: x = -8
Answer:
true!
Step-by-step explanation:
hi, this graph is a function because it passes the vertical line test. there are no x-values with 2 y-values for the same x.
Answer:
a) 9 meters.
b) The total change in temperature was of 288ºC
Step-by-step explanation:
Both these questions can be solved using rules of three.
a) 72 meters in 8 seconds. How many meters it changes each second(in 1 second)?
8s - 72m
1s - x m
9 meters.
b) In 1 hour, heated by 6ºC. How much in total during 48 hours?
1h - 6ºC
48h - xºC
x = 48*6
The total change in temperature was of 288ºC
The interest is computed from
... I = Prt
where P is the principal amount ($569), r is the rate (0.045) and t is the time in years (250/360).
... I = $569×0.045×250/360 ≈ $17.78
Please note that time is not rounded. Rather, the exact value (25/36) is used in the calculation. The only rounding of any number is done at the end, where the amount is rounded to the nearest cent. (Your text authors should know this.)
_____
If you follow the problem instructions (which Valerie's lender will <em>not</em> do), the interest is calculated as ...
... t = 250/360 = 0.6944444... ≈ 0.69 . . . . years
... I = $569×0.045×0.69 ≈ $17.67
_____
Note the rounding of intermediate numbers (time) introduces an error of about $0.11 in the answer.
