PLEASE HELP 11223344

D

Step-by-step explanation:

3x + y = 10

we transform this to the standard form

y = -3x + 10

the slope is therefore -3 or -3/1.

the perpendicular slope is its turning the original slope upside-down and flipping the sign.

so,

it is 1/3.

that eliminates A and C.

so, is B or D correct ?

we find out by simply putting the point coordinates in as x and y values, and then see, if the equation is true.

B

-5 = 1/3 × 6 + 3

-5 = 2 + 3 = + 5

that is wrong. -5 is not equal to +5.

D

-5 = 1/3 × 6 - 7

-5 = 2 - 7 = -5

correct ! D is the right answer.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4