So the equation is 6x+10y=z and you can plug in y and z then it’s 6x+10*6=210. Simplifying can get you 6x=150 then divide by 6 to get 25.

The answer is 25 hours.

8 0

3 years ago

Can’t figure this out, really need help

LenKa [72]

The equation of the graphed circle is:

$(x+3)^2+(y-6)^2=13$

The equation of a circle with center (a, b) is:

$(x - a)^2+(y-b)^2=r^2$

The circle shown passes through the point (0, 8) and has a center (-3, 6)

The radius of the circle is calculated as:

$r=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} \\\\r=\sqrt{(0-(-3))^2+(8-6)^2}\\\\r=\sqrt{9+4} \\\\r=\sqrt{13}$

Substituting a = -3, b = 6, and $r=\sqrt{13}$ into the equation $(x - a)^2+(y-b)^2=r^2$

$(x-(-3))^2+(y-6)^2=\sqrt{13^2} \\\\(x+3)^2+(y-6)^2=13$

Therefore, the equation of the circle is:

$(x+3)^2+(y-6)^2=13$

Learn more on equation of a circle here: brainly.com/question/17064049

5 0

2 years ago

What are the coefficients of the following expression?

quester [9]

For this we almost have an expression of the form:
ax4 + bx3 + cx2
Where, the coefficients are given by the values of a, b, c.
Substituting values we have:
7x4 - 9x3 + 2x2
Therefore, the coefficients are:
a = 7
b = -9
c = 2
Answer:
a = 7
b = -9
c = 2

5 0

3 years ago