1800
20%=1/5 which means 360x5 is the number of people at the concert
360x5=1800
hope this helps :)
You need to graph it?
5x - 2y = 7
you need two points to graph a line
make x = 0
5(0) - 2y = 7
-2y = 7
/-2 /-2
y = 7/-2 (0, -7/2)
make y = 0
5x - 2(0) = 7
5x = 7
/7 /7
x = 7/5 (7/5, 0)
make those points and join them
(96+92+80+91+86+x)= 90
________________
6
(445+x)=90
_____
6
then you multiply 6 on both sides
445+×=540
-445. -445
x= 95
they need a 95 percent to have an average of a 90%.
Answer:
Step-by-step explanation:
This is a quadratic equation. We'll find the discriminant, but must first rewrite this equation in standard form:
5w2 – 2w + 4 = -4 + 4, or 5w^2 - 2w + 4 = 0
The coefficients of the w terms are {5, -2, 4}
and so the discriminant b^2 - 4ac is 4 - 4(5)(20) = -396
Because the discriminant is negative, we know that there will be two unequal, complex solutions.