Answer:
f = 5/6 - 7a/6 + d/2
Step-by-step explanation:
Estimate : 14 - 2 = 12......20 - 12 = 8
real thing :
13.59 - 1.85 = 11.74
20 - 11.74 = 8.26
Answer:
The last one
Step-by-step explanation:
1/256 can only be a non fraction is the exponent is negative. but since the t is not also in the denominators the original two exponents must be negative so they times to a positive so:
(4t^-4) ^-7
(4^-7) (t^-4×-7)
(1/4^7) (t^28)
1/256 t^28
Answer: m = 20.
Step-by-step explanation: A triangle has to be 180 degrees. 180-135-25=20.
<h3>
Answer:</h3>
- 32 kg of 30% copper
- 48 kg of 55% copper
<h3>
Step-by-step explanation:</h3>
Let x represent the mass of 55% copper alloy that is to be used in the mix. Then 80-x is the mass of 30% copper alloy to be used. The total amount of copper in the mix is then ...
... 0.55x + 0.30(80-x) = 0.45·80
... 0.25x = 12 . . . . . . simplify, subtract 24
... x = 48 . . . . . . . . . divide by the coefficient of x
... 80-x = 32 . . . . . . the mass of 30% copper alloy required
The metalworker should combine 32 kg of 30% copper alloy with 48 kg of 55% copper alloy to make 80 kg of 45% copper alloy.
