a=-2 b=5 c=-4 d=6
question is
b^2-2bc+c^2
see if i did the steps right please
(5^2)-(2*5*-4)+(-4^2)
(5^2)-(10*-4)+(-4^2)
(5^2)-(-40)+(-4^2)
5^2-(-40)-4^2
25-(-40)-4^2
25+40-4^2
25+40-16
65-16
49
No. Minus four squred is positive sixteen.
eighty percent of 280 is what number?
draw a diagram of the problem
23
2/3 (7/8 - 4x) - 5/8 = 3/8
multiply 2/3 by 7/8 - 4x
2/3 x 7/8 = 7/12
2/3 x -4x = -8/3x
7/12 - 8/3x - 5/8
-1/24 - 8/3x = 3/8
add -1/24 to both sides
-8/3x = 3/8 + 1/24
-8/3x = 5/12
x = 5/12 / -8/3
x = -15/96 or
answer: x = -5/32
9x-6=30
2x-3y=14 2x+y=-10
To correctly solve the expression b^2-2bc+c^2, let's go through the steps:
Step 1: Substitute the given values:
a = -2, b = 5, c = -4
Step 2: Evaluate the expression:
b^2-2bc+c^2
(5^2)-(2*5*-4)+(-4^2)
25-(10*-4)+(-16)
25-( -40 )+16
25+40+16
81
Therefore, the correct answer to the expression b^2-2bc+c^2 is 81, not 49 as stated in your calculation.
Now, let's move on to the next problem:
The question is: "Eighty percent of 280 is what number?"
To solve this, we need to find 80% of 280. Here's how you can do it:
Step 1: Convert 80% to decimal form by dividing it by 100:
80% = 80/100 = 0.8
Step 2: Multiply the decimal value by 280:
0.8 * 280 = 224
So, eighty percent of 280 is 224.
As for drawing a diagram of the problem, since this is a simple calculation, it doesn't require a diagram. However, if you have any other problem that can be better explained with a diagram, please provide the specific details, and I'll be glad to help.