Answer:
Each triangle weighs 3 grams.
Step-by-step explanation:
On the left side, there are 6 squares (12 grams) 3 circles (9 more grams), and 2 triangles (2x grams).
On the right side, there are 3 squares (6 grams) 2 circles (6 grams), and 5 triangles (5x grams).
This makes the equation 21 + 2x = 12 + 5x.
Let's find x.
21 + 2x = 12 + 5x
Subtract 5x from both sides.
21 - 3x = 12
subtract 21 from both sides.
-3x = -9
Divide by -3.
x = 3.
Each triangle weighs 3 grams. Let's prove this.
21 + 2x = 12 + 5x
21 + 2(3) = 12 + 5(3)
21 + 6 = 12 + 15
27 = 27
Here’s if you need it written out
X+56<533
-56 -56
x<477 thats the answer
Answer:
<h2>8</h2>
Step-by-step explanation:
![\text{The quadratic equation:}\ ax^2+bx+c=0.\\\\\text{We have}\ x^2-4x+2=0\\\\a=1,\ b=-4,\ c=2\\\\\text{Substitute to}\ b^2-4ac:\\\\b^2-4ac=(-4)^2-4(1)(2)=16-8=8](https://tex.z-dn.net/?f=%5Ctext%7BThe%20quadratic%20equation%3A%7D%5C%20ax%5E2%2Bbx%2Bc%3D0.%5C%5C%5C%5C%5Ctext%7BWe%20have%7D%5C%20x%5E2-4x%2B2%3D0%5C%5C%5C%5Ca%3D1%2C%5C%20b%3D-4%2C%5C%20c%3D2%5C%5C%5C%5C%5Ctext%7BSubstitute%20to%7D%5C%20b%5E2-4ac%3A%5C%5C%5C%5Cb%5E2-4ac%3D%28-4%29%5E2-4%281%29%282%29%3D16-8%3D8)
Answer: 13
Step-by-step explanation: In this problem we're asked to rewrite as addition and then evaluate.
It's important to understand that minus a negative means the same thing as plus a positive so we can change 5 - (-8) to 5 + (+8).
Now we can simply add to get a sum of 13.
Therefore, 5 - (-8) or 5 + (+8) = 13