In a group of 80 children there are three times as many boys as girls how many girls are there ?
2 answers:
If I assume the number of girls is x, then the number of boys will be 3x We know there are 80 children is 80, therefore x+3x=80 4x=80 x=20 There are 20 girls.
Hi there! ~ Okay, so lets say that x = The total number of girls andy = The total number of boys . In this equation it says "there are three times as many boys as there are girls." So we know we would have 3 * x = y So now we need to solve; We first have x + y = 80 (80 being the total number of children, as stated in the question) Now we want to add x to both sides.3 * x + x = 80 + x Now we can do4 * x = 80/4 x = 80/4 and then we would know that 80/4 = 20 Sox = 20 20 TOTAL GIRLS. Now we have y= 3 * x = 3 * 20 - = 60 60 TOTAL BOYS. Now we can check by doing60+20=80 So in conclusion we know that we have a total of 20 girls and 60 boys.
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Over which interval(s) is the function decreasing?
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Step-by-step explanation:
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(7, 0), (-8, 0), (0, 0)
Step-by-step explanation:
y = f(x) = 0
the real solutions are the ones that cross the x-axis because when a point is on the x-axis, its y coordinate will be 0.
=> (7, 0), (-8, 0), (0, 0)