Answer: 64<em>% were girls</em>
Step-by-step explanation:
<em>Add 320 with 180</em>
<em>320+180=500</em>
<em>take 500 and divide it by 320</em>
<em>320/500 = 64</em><em>%</em>
Answer: The leading coefficient is -1.
Step-by-step explanation: Coefficients are the numbers than procede each term with a variable (in this instance,<em> </em>x) in the equation.

There are four terms in this equation, which has been reordered in the correct form, which is from the highest term to the lowest term (based on exponent values).
Thus, there are three coefficients in this equation, which, in order, are as follows:

Answer:
Step-by-step explanation:
First plot the two points on the graph (0, 0) and (1/3, 7/3)
Then connect those points by a line and extend the line
<em>See attached</em>
<u>Slope is:</u>
- m = 7/3 : 1/3 = 7/3*3 = 7
Plug 1 in for x to get 7y=3(1)-7
7y=-4
y=-4/7
the complete question in the attached figure
Volume of the sand V=(1/3)*h*π*r²
we have that
h=30 mm
r=10 mm
v=(1/3)*30*π*10²=1000≈3140 mm³
the rate is 50 mm³/seg
50 mm³--------------------------------------> 1 seg
3140 mm³-------------------------------- X
x=3140/50=62.8 seg
the answer is 62.8 seg