Allison and her children went into a bakery where they sell donuts for $2 each and cookies for $1 each. Allison has $20 to spend and must buy at least 11 donuts and
cookies altogether. If represents the number of donuts purchased and y represents
the number of cookies purchased, write and solve a system of inequalities graphically
and determine one possible solution.
Inequality 1: y z
plot
switch shade
Inequality 2: y 24
plot
wwitch shade

ye

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.