Mathematics, 25.01.2021 21:00 lizzy6629
If the concentration of mercury in a water supply changes from 65 ppm to 7 ppm in a ten-year period, what is the percentage change of the mercury concentration? (with explanation pls)
Answers: 1
Mathematics, 21.06.2019 14:30
The sum of two numbers is 58. the first number is 8 less than half the second number. let c represent the first number. let drepresent the second number. which statements about solving for the two numbers are true? check all that apply.the equation  represents the sum of the two numbers.the equation  represents the sentence “the first number is 8 less than half the second number.”the equation  represents the relationship between the two numbers.the equation  represents the sum of the two numbers.the number d is 14.the number c is 44.the number c is 14.the number d is 44.
Answers: 1
Mathematics, 21.06.2019 14:40
Asequence is defined recursively by the formula f(n + 1) = f(n) + 3 . the first term of the sequence is –4. what is the next term in the sequence? –7–117
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Mathematics, 21.06.2019 16:00
What is the length of the unknown leg in the right triangle ?
Answers: 2
Mathematics, 21.06.2019 20:30
26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition
Answers: 1
If the concentration of mercury in a water supply changes from 65 ppm to 7 ppm in a ten-year period,...
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