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Sloan [31]
3 years ago
15

18. A science teacher has a supply of 20% saline solution and a supply of 50% saline solution. How much of each solution should

the teacher mix together to get 60 mL of 28% saline solution for an experiment? (1 point) A) 16 mL of the 20% solution and 44 mL of the 50% solution B) 44 mL of the 20% solution and 16 mL of the 50% solution C) 16 mL of the 20% solution and 16 mL of the 50% solution D) 44 mL of the 20% solution and 44 mL of the 50% solution
I know the answer is b but could someone explain how to get that answer
Mathematics
1 answer:
IRISSAK [1]3 years ago
7 0
<span>44 mL of the 20% solution and 16 mL of the 50% solution  is your answer


</span>
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An ostrich that is 133 inches tall is 18 inches taller than 5 times the height of a kiwi.
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Which of the following is the complete list of roots for the polynomial function f(x)=(x^2+6x+8)(x^2+6x+13)
MrMuchimi

Answer:

<h2>x = -4 or x = -2</h2>

Step-by-step explanation:

f(x)=(x^2+6x+8)(x^2+6x+13)\\\\f(x)=0\iff(x^2+6x+8)(x^2+6x+13)=0\iff\\x^2+6x+8=0\vee x^2+6x+13=0\\\\x^2+6x+8=0\\x^2+4x+2x+8=0\\x(x+4)+2(x+4)=0\\(x+4)(x+2)=0\iff x+4=0\ \vee\ x+2=0\\x+4=0\qquad\text{subtract 4 from both sides}\\\boxed{x=-4}\\x+2=0\qquad\text{subtract 2 from both sides}\\\boxed{x=-2}\\\\x^2+6x+13=0\qquad\text{subtract 13 from both sides}\\x^2+6x=-13\\x^2+2(x)(3)=-13\qquad\text{add}\ 3^2=9\ \text{to both sides}\\x^2+2(x)(3)+3^2=-13+9\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\(x+3)^2=-4

8 0
3 years ago
7.
Anuta_ua [19.1K]

Answer:

A. y ≥ 2x – 2

Step-by-step explanation:

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