Answer:
C. x = 40
Step-by-step explanation:
1. Get the supplementary angle of ∠9: 180 - m∠9 = 180 - (4x-10)
2. The inside angles of that triangle add up to 180: 30 + 3x + 180 - (4x-10) = 180
3. Solve for x:
30 + 3x + 180 - (4x-10) = 180
30 + 3x + 180 - 4x + 10 = 180 Distribute negative to parenthesis
220 - x = 180 Combine like terms
-x = -40 Subtract 220 on both sides
x = 40 Divide both sides by -1
Answer:
7 + 28d
Step-by-step explanation:
-7(-1 - 4d) [ -7 gets multiplied with -1 and-4d when brackets open ]
= -7 × (-1) -7 × (-4d)
= <u>7 + 28d (Ans)</u>
If he has 484 plants and there are as many rows as there are plants in each row, his field is a square.
The area of a square = (side)^2
In this problem,
Area = 484
side = # of rows
Let's plug our values into the formula above
484 plants = (side)^2
Take the sqrt of both sides.
22 rows = side.
Write an equation: 21+5x=48.5;
Then solve for x: 5x=27.5, x=5.5