Commutative Property of Addition
Answer:
x=5
Step-by-step explanation:
3.2x+4=20
Subtract 4 from both sides
3.2x=16
divide by 3.2
x=5
Answer:
BC=√7
Step-by-step explanation:
AC=4
AC=AH+HC
=3HC+HC
=4HC
HC=1/4AC=1/4×4=1
AH=3HC=3×1=3
BH⊥ AC
AB=AC=4
![BC=\sqrt{AB^2-AH^2} =\sqrt{4^2-3^2} =\sqrt{16-9} =\sqrt{7}](https://tex.z-dn.net/?f=BC%3D%5Csqrt%7BAB%5E2-AH%5E2%7D%20%3D%5Csqrt%7B4%5E2-3%5E2%7D%20%3D%5Csqrt%7B16-9%7D%20%3D%5Csqrt%7B7%7D)
<span>(5x+10)/(x²-x-6)
1) 5x+10 = 5(x+2)
2) x² - x - 6 = (x+2)(x-3) 6 = -3*2, -1=-3+2
</span>(5x+10)/(x²-x-6) = 5(x+2)/5(x+2)
As we can see greatest common factor is <span>C. x + 2.</span>
28 divided by 4 = 6. Mark saw 6 birds!