Answer:
180cm^2 & 472ft^2
Step-by-step explanation:
answer of 16 number
h2=p2+b2 ,therefore
h=100+80
h=180
answer of question 17
h2=p2+b2
576=p2+104
576-104=p2
472=p2
Answer:
$16.96
Step-by-step explanation:
Do 3.99 times 2 to get 7.98
And then do 4.49 times 2 to get 8.98
Add the results together to get 16.96
Step-by-step explanation:
![a)\\A=\dfrac{1}{2}h(a+b)\qquad\text{multiply both sides by 2}\\\\2A=2\!\!\!\!\diagup\cdot\dfrac{1}{2\!\!\!\!\diagup}h(a+b)\qquad\text{use the distrigutive property}\\\\2A=ha+hb\qquad\text{subtract}\ hb\ \text{from both sides}\\\\2A-hb=ha\qquad\text{divide both sides by}\ h\neq0\\\\\dfrac{2A-hb}{h}=a\to \boxed{a=\dfrac{2A-hb}{h}}](https://tex.z-dn.net/?f=a%29%5C%5CA%3D%5Cdfrac%7B1%7D%7B2%7Dh%28a%2Bb%29%5Cqquad%5Ctext%7Bmultiply%20both%20sides%20by%202%7D%5C%5C%5C%5C2A%3D2%5C%21%5C%21%5C%21%5C%21%5Cdiagup%5Ccdot%5Cdfrac%7B1%7D%7B2%5C%21%5C%21%5C%21%5C%21%5Cdiagup%7Dh%28a%2Bb%29%5Cqquad%5Ctext%7Buse%20the%20distrigutive%20property%7D%5C%5C%5C%5C2A%3Dha%2Bhb%5Cqquad%5Ctext%7Bsubtract%7D%5C%20hb%5C%20%5Ctext%7Bfrom%20both%20sides%7D%5C%5C%5C%5C2A-hb%3Dha%5Cqquad%5Ctext%7Bdivide%20both%20sides%20by%7D%5C%20h%5Cneq0%5C%5C%5C%5C%5Cdfrac%7B2A-hb%7D%7Bh%7D%3Da%5Cto%20%5Cboxed%7Ba%3D%5Cdfrac%7B2A-hb%7D%7Bh%7D%7D)
![b)\\a=\dfrac{2A-hb}{h}\\\\\text{Substitute:}\ A=19.95\ cm^2,\ b=7.8\ cm,\ h=3.5\ cm\\\\a=\dfrac{2(19.95)-(3.5)(7.8)}{3.5}=\dfrac{39.9-27.3}{3.5}=\dfrac{12.6}{3.5}=3.6\\\\\boxed{a=3.6\ cm}](https://tex.z-dn.net/?f=b%29%5C%5Ca%3D%5Cdfrac%7B2A-hb%7D%7Bh%7D%5C%5C%5C%5C%5Ctext%7BSubstitute%3A%7D%5C%20A%3D19.95%5C%20cm%5E2%2C%5C%20b%3D7.8%5C%20cm%2C%5C%20h%3D3.5%5C%20cm%5C%5C%5C%5Ca%3D%5Cdfrac%7B2%2819.95%29-%283.5%29%287.8%29%7D%7B3.5%7D%3D%5Cdfrac%7B39.9-27.3%7D%7B3.5%7D%3D%5Cdfrac%7B12.6%7D%7B3.5%7D%3D3.6%5C%5C%5C%5C%5Cboxed%7Ba%3D3.6%5C%20cm%7D)
84 is a composite number. 84 = 1 x 84, 2 x 42, 3 x 28, 4 x 21, 6 x 14, or 7 x 12.
Factors of 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84.
Answer:
I think the answer is (27, 14)