Answer:
![5\frac{1}{4}](https://tex.z-dn.net/?f=5%5Cfrac%7B1%7D%7B4%7D)
Step-by-step explanation:
Greatest multiplier of 4 that is less than 21 is 5 (4 x 5 = 20)
Put the remaining number as the numerator (21 - 20 = 1)
Answer:
3.256*10³2
Step-by-step explanation:3.256 * 1000 = 3256 1000 =10³
Answer:
![(9a+9b-8)(a+b+1)](https://tex.z-dn.net/?f=%289a%2B9b-8%29%28a%2Bb%2B1%29)
Step-by-step explanation:
![9(a+b)^2 + (a+b)-8](https://tex.z-dn.net/?f=9%28a%2Bb%29%5E2%20%2B%20%28a%2Bb%29-8)
Expand ![(a+b)^2](https://tex.z-dn.net/?f=%28a%2Bb%29%5E2)
![9(a^2+2ab+b^2)+a+b-8](https://tex.z-dn.net/?f=9%28a%5E2%2B2ab%2Bb%5E2%29%2Ba%2Bb-8)
![9a^2+18ab+9b^2+a+b-8](https://tex.z-dn.net/?f=9a%5E2%2B18ab%2B9b%5E2%2Ba%2Bb-8)
Now it is time to think.
Once
![9a^2=9a \cdot a](https://tex.z-dn.net/?f=9a%5E2%3D9a%20%5Ccdot%20a)
![9b^2=9b \cdot b](https://tex.z-dn.net/?f=9b%5E2%3D9b%20%5Ccdot%20b)
![18ab=9ab+9ab](https://tex.z-dn.net/?f=18ab%3D9ab%2B9ab)
![-8=-8 \cdot 1](https://tex.z-dn.net/?f=-8%3D-8%20%5Ccdot%201)
We can get something in the format
![(9a+9b-8)(\text{some expression here})](https://tex.z-dn.net/?f=%289a%2B9b-8%29%28%5Ctext%7Bsome%20expression%20here%7D%29)
From the conclusions above,
![(9a+9b-8)(a+b+1)](https://tex.z-dn.net/?f=%289a%2B9b-8%29%28a%2Bb%2B1%29)
Answer:
tall of the tent (H) = 1.36 meter
Step-by-step explanation:
tall of the tent (H)
sin 20° = H/4
H = 4 x sin 20° = 4 x 0.34 = 1.36 meter