CALCULATOR 10. At Finky Feed Store, Gerby purchased 7 pounds of
cracked corn, 3 pounds of sunflower seed, and 8 pounds
of mixed bird seed for $31.00. Michael purchased 5
pounds of cracked corn, 4 pounds of sunflower seed,
and 10 pounds of mixed bird seed for $32.75. Jayleen
purchased 4 pounds of sunflower seed and 12 pounds
of mixed bird seed for $27.00. If c, represents cracked
corn, s represents sunflower seeds, and b represents
bird seed, which of the systems of equations below can
be used to determine the price per pound of cracked
corn, sunflower seed, and bird seed?

the answer to the question is a

step-by-step explanation:

it has the same slope and the same y-intercept.

y + 11 = -7/9(x - 18)

y + 11 =-7/9x + 14

b

y = -7/9x + 3

y-intercept (0, 3)

b.an increase in a causes b to decrease

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.