10meters=1000cm
1000-210=890
Mary has 890 centimeters of thread left on the reel.
25 because you have to multiply 5✖️5 which equals 25. 5 is the 5 layers and the other 5 for the 5 rows.
Answer:
Step-by-step explanation:
We group the number 5:
5(x² + 3x + 2.25)
Now inside the brackets we'll take the square root of the coefficient of the x and the square root of the last number, then remove the square from the x and write it as a sum:
5(x+1.5)²
What's the idea behind this?
Well, remember that when you have something in the form:
(a+b)²
It actually means:
a² + 2ab + b²
In our case a was x, and b was 2.25. For bringing it into the shorter form we have to take the square root of a and b.
Sorry if you don't understand. Tell me if you need help to get the xoncept better.
You subtract 13 from both sides, leaving us with:
x = 74 - 13
x = 61. this answer has not been listed, but it is correct.
maybe you made a typo when writing the actual problem down? if not, 61 is the answer.