We have solutions of 20% acid and 40% acid.
We need 60 liters of 40% acid.
"t" is liters of 20% and "f" is liters of 40%
We have to set up two equations:
A) t + f = 60
B) .20t + 1.0f = (60*.40)
Multiplying equation A) by -.2
A) -.2t -.2f = -12 then adding that to B)
B) .2t + f = (24)
.8f = 12
forty per cent volume = 15 liters
A) t + f = 60
Twenty per cent volume = 45 liters
Source:
http://www.1728.org/mixture.htm
Answer: 17
Step-by-step explanation: There are 34 squares in the blue figure each one is 0.5 cm. So what we do is multiply 0.5 x 34 which gives us the answer of 17.
Answer:
see explanation
Step-by-step explanation:
A difference of two squares is factored as
a² - b² = (a - b)(a + b)
(g)
1 - 81y²
= 1² - (9y)²
= (1 - 9y)(1 + 9y)
(j)
64x² - 25y²
= (8x)² - (5y)²
= (8x - 5y)(8x + 5y)
Answer:
The answer is 13, 9 and (-1)
Step-by-step explanation:
<h3><u>Given</u>;</h3>
<h3><u>To </u><u>Find</u>;</h3>
- h(x) = (-2x + 9) when x = (-2), 0 and 5.
For x = (-2)
h(x) = (-2x + 9)
h(-2) = [-2(-2) + 9]
h(-2) = (4 + 9)
h(-2) = 13
For x = 0
h(x) = (-2x + 9)
h(0) = [-2(0) + 9]
h(0) = (0 + 9)
h(0) = 9
For x = 5
h(x) = (-2x + 9)
h(5) = [-2(5) + 9]
h(5) = [(-10) + 9]
h(5) = (-1)
Thus, The answer is 13, 9 and (-1) when x = (-2), 0 and 5 respectively.
Answer: The slope is -5/4