Tax is:
$52* (2.9/100)= $1.51
$52+ $1.51= $53.51
The total cost (including tax) is $53.51~
Answer) Od
(a+b)2 =a2+2ab+b2
The correct answer is A. 3:4 = 9:12
Answer:
y = 1/5x + 2
Step-by-step explanation:
y = - 5x - 4
Slope: -5
Slope of the perpendicular line: 1/5
Point (15,5)
y-intercept: 5 - (1/5)(15)
= 5 - 3 = 2
<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.
