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Multiply each term on the first equation by (-3). Now, you get: 9x-21y=48 now, you add both equations. 9x-21y=48 +(-9x)+5y=16 (-9x) and 9x cancells out, (-21y) and 5y combined is (-16y), and 48+16 is 64. The new equation should look like this: (-16y)=64
From the second equation, solve for x. Then, plug what the solution for x is in the first equation, and solve for y.
Area=Length*width so, 48=10*width (we'll use w to stand for width) 48=10w now divide by 10 48/10=w, or the width. 48/10=4.8 So... The width is 4.8 ft
Cross multiply to find x. so... 3/x = 3x/x^2 --> (3*x^2) = (3x*x) Now simplify.
So the answer would be 250 people in the village in total.
The proportion would be 1/5 equals 50/x and cross multiply/simplify to figure out the value of x or the total amount of people in the village.
since 50 people have been inoculated, and that's 1/5 of the village people (that has been inoculated), then set up an proportion.
I do not remember exactly what to do, but I think you should try to substitute x with -3. This is because f(-3) is the same as f(x), except that x is already provided.
Read the multiple choice answers. 52 is not there, right? Since you got 50.94, The number of whole years is 50. So, your answer is 50.
Just add the 2 distances. But use your imagination for the sketch!
Or, as an easier way, subsitute A in the equation with each answer. Then see which equation equals 125 or around 125.
The equation is M=176-0.8A, where M=maximum heart rate (in beats/minute) and A=Age. The question is asking you to find the age if the maximum heart rate (in beats/minute), or M, is 125. So, just plug in the value of M, or 125, and solve the equation.
