Answer:
y= 77
Step-by-step explanation:
<em>Write down the equation for direct proportion.</em>
y= kx, where k is a constant.
<em>Find the value of k.</em>
When x= 12, y= 84,
84= k(12)
12k= 84
k= 84 ÷12
k= 7
<em>Substitute</em><em> </em><em>the</em><em> </em><em>value</em><em> </em><em>of</em><em> </em><em>k</em><em> </em><em>into</em><em> </em><em>the</em><em> </em><em>equation</em><em>.</em>
y= 7x
When x=11,
y= 7(11)
y= 77
Answer:
I think the midpoint is 5.
Step-by-step explanation:
Answer:
![1~1/2](https://tex.z-dn.net/?f=1~1%2F2)
Step-by-step explanation:
If he digs at a rate of
feet every hour, and he needs
hours, we want to find
feet.
Answer:
(2 z + 3) (4 z^2 - 6 z + 9)
Step-by-step explanation:
8z3 + 27
a = 2z
b = 3
a^2 = (2z)^2 = 2z^2
ab = (2z)*3 =6z
b^2 = 3^2 =9
a3 + b3 = (a + b)(a2 – ab + b2)
8z^2 +27 = (2z+3) (4z^2 -6z +9)