M = 21 - R is our equation. Plug your value of 12 into the equation for R.
M = 21 - 12.
M = 9.
Greg would have 9 magazines left after reading 12 of them
Answer:
yes and no
Step-by-step explanation:
0.999... is as close as you can get to 1 and not actually be there.
Most people just round up to 1
X was already negative so the only thing turning negative is Y!
So the first one is correct.
They all say the same thing
X ya era negativo, por lo que lo único que se vuelve negativo es Y!
Entonces el primero es correcto
X était déjà négatif donc la seule chose qui devient négative est Y!
Donc le premier est correct
X已经是负数,所以唯一变成负数的就是Y!
所以第一个是正确的
X已經是負數,所以唯一變成負數的就是Y!
所以第一個是正確的
a number without fractions
Answer:
see explanation
Step-by-step explanation:
The hypotenuse is the longest side thus is (4x + 1)
The legs are 2x and (4x - 1)
Using Pythagoras' theorem, then
(4x + 1)² = (2x)² + (4x - 1)² ← expanding factors
16x² + 8x + 1 = 4x² + 16x² - 8x + 1 , that is
16x² + 8x + 1 = 20x² - 8x + 1 ( subtract 20x² - 8x + 1 from both sides )
- 4x² + 16x = 0 ( multiply through by - 1 )
4x² - 16x = 0 ← factor out 4x from each term
4x(x - 4) = 0
Equate each factor to zero and solve for x
4x = 0 ⇒ x = 0
x - 4 = 0 ⇒ x = 4
Now x > 0, thus x = 4
2x = 2(4) = 8
4x - 1 = 4(4) - 1 = 16 - 1 = 15
4x + 1 = 4(4) + 1 = 16 + 1 = 17
Thus
perimeter = 8 + 15 + 17 = 40 cm