<span> 2 • (3x3 + 2x2 + 5x + 5)</span>
Answer: D. 3y + 5 − 7y = 4(-y + 1) + 5
Step-by-step explanation:
Original equation:
3y + 5 - 7y = 4(-y+1) + 5
Group like terms on the left of the equal sign and distribute on the right side of equal sign:
-4y + 5 = (-4y +4) + 5
Simplify:
-4y + 5 = -4y +9
Subtract 5 from both sides:
-4y = -4y + 4
Add 4y to both sides:
0 = 4
0 CANNOT equal 4 therefore, this equation has no solution.
Answer:
26 sq in.
Step-by-step explanation:
Let x = measure of one acute angle
3x - 2 = measure of other acute angle
Since the triangle is a right triangle, the sum of the measures of the acute angles is 90
x + 3x - 2 = 90
4x - 2 = 90
4x = 92
x = 23
90 - 23 = 67
The acute angles are 23° and 67°
Now, let a = length of side opposite the 23° angle
sin 23 = a/12
a = 12 sin 23
Let b = length of the side opposite the 67° angle
sin 67 = b/12
b = 12 sin 67
Area = 1/2ab = 1/2(12 sin 23°)(12 sin 67°)
= 25.90
26 sq in to the nearest inch
Wow! That is quite the problem.
All you would need to to is do 13+23= 33 to get the total amount of people who dropped out, then do 72 ( the number in the beginning and subtract 33 from it because those are the people who dropped out so 72-33=39. 39 people finished the race.
Answer:
x=3, y=4. (3, 4).
Step-by-step explanation:
x+y=7
x+2y=11
--------------
-x-y=-7
x+2y=11
--------------
y=4
x+4=7
x=7-4
x=3
