A gardener plants three different saplings at East Green, Central Park . The number of magnolia saplings he planted was 3 less than crab apple saplings. The Kwanzan cherry saplings planted amounted to twice the number of magnolias. If 35 saplings were planted in all, how many Kwanzan cherry saplings he planted?

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

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:

it has to have an angle of 90 degrees