Please help me find bdc i need this for a test my grade due tmr ,

A

Step-by-step explanation:

we know that both angles must add up to 90 which means that

-3x+20-2x+55=90

solve for x

-5x+75=90

-5x= 15

x= -3

then just plug in x= -3 into (-3x+20)

(-3*-3+20)=29

a

Step-by-step explanation:

the correct answer is 5 6 and 7

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3