Answer:
-15, no roots
Step-by-step explanation:
b^2-4ac to find the discriminant
1^2-4*2*2=
1-16=
-15
-15<0
so there are no roots
Answer:
500 shots
Step-by-step explanation:
the question is 8% of what number is 40?
we can use this proportion: is/of = %/100
let 'g' = number of goals
40/g = 8/100
cross-multiply to get:
8x = 4000
x = 500
Please read the attached file
Answer:
Please find the grid of Sparrows and Cardinals below.
Step-by-step explanation:
Ratio 3:1 of Sparrows to Cardinals
There are at least 7, but less than 11 sparrows that eat at Mrs. Sims bird feeder
Let's build the grid for sparrows and cardinals, this way:
<u>Sparrows = 7 - 8 - 9 - 10 - 11</u>
<u>Cardinals = 2 - 3 - 3 - 3 - 4</u>
For calculating the number of cardinals we use the ratio 3:1 and round the number of cardinals to the next whole number.
<u>Number of sparrows 7 to 11</u>
<u>Number of cardinals 2 to 4</u>
I: 4x - 2y = 8
4 * 0 - 2y = 8
0 - 2y = 8
2y = 0 - 8
2y = -8
y = -8/2
y = -4
II: 4x - 2y = 8
4*2 - 2y = 8
8 - 2y = 8
2y = 8-8
2y = 0
y = 0/2
y = 0
III: 4x - 2y = 8
4 * (-1) - 2y = 8
-4 - 2y = 8
2y = -4-8
2y = -12
y = -12/2
y = -6
