Answer:
calcium is in shells and bones
Step-by-step explanation:
71% of 40 is 28.4
Divide 28.4 by 40:

Change the decimal to a percentage by multiplying by 100:
Answer:
180
Step-by-step explanation:
spr is one line and qp is another in a perpendicular position
To determine which of the choices is lies on the line represented by the equation, 2x + 5y = 4, substitute the values of the abscissas to the x of the equation and solve for y. Evaluate if the y calculated is equal to the ordinate of the ordered pair. Calculations are shown below.
A. (7, -2) ; 2(7) + 5y = 4 ; y = -2 ; EQUAL
B. (0,-1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL
C. (0,1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL
D. (3, -2) ; 2(-3) + 5y = 4 ; y = 2 ; NOT EQUAL
Thus, the answer is letter A. (7, -2)
Answer:

Step-by-step explanation:
So lets get the denominators the same:

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Hoped I helped, have a nice day!
And please help: brainly.com/question/22129776