Solution:
1. Move all terms to one side
<span>25{x}^{2}+40x+16-28=0</span>
2. Simplify <span>25{x}^{2}+40x+16-28 to <span>25<span>x<span><span>2</span><span></span></span></span>+40x</span></span><span><span>−12</span></span>
<span>25{x}^{2}+40x-12=0</span>
3. Apply the Quadratic Formula<span>x=\frac{-40+20\sqrt{7}}{50},\frac{-40-20\sqrt{7}}{50}
</span>
4. Simplify solutions
<span>x=-\frac{2(2-\sqrt{7})}{5},-\frac{2(2+\sqrt{7})}{5}</span>
Done!
9514 1404 393
Answer:
domain = range = (-∞, ∞)
Step-by-step explanation:
The domain and range of any linear function with non-zero defined slope are "all real numbers."
Answer:
$170
Step-by-step explanation:
15% off means you pay 85% of the original price.
To find the price you will pay take the original price $200 and multiply that by .85 to figure out how much you will pay.
200 x .85 = $170
Answer:
The final amount after decreasing upto 2 DP is 771.18
Step-by-step explanation:
Amount given is 943
13% of ammount will be = 943 x 13%
=![943\times (\frac{13}{100} )\\943 \times 0.13\\122.59](https://tex.z-dn.net/?f=943%5Ctimes%20%28%5Cfrac%7B13%7D%7B100%7D%20%29%5C%5C943%20%5Ctimes%200.13%5C%5C122.59)
Decreasing 13% from 943 we get = 943-122.59
=820.41
Now the ammount = 820.41
for finding final amount
find
6% of amount (820.41) we get = 820.41x 6%
=![820.41\times( \frac{6}{100} )\\820.41\times 0.06\\49.23](https://tex.z-dn.net/?f=820.41%5Ctimes%28%20%5Cfrac%7B6%7D%7B100%7D%20%29%5C%5C820.41%5Ctimes%200.06%5C%5C49.23)
Decreasing 6% from 820.41 we get final amount= 820.41- 49.23
=771.18
so the final amount is 771.18
Keywords: Percentage
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