The answer is
X=7
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9514 1404 393
Answer:
s ≥ 60
Step-by-step explanation:
If Scott earned 20 points more on this test, then he earned 20 points less on the last test. 20 points less than "at least 80" is "at least 60."
s ≥ 60
Answer:what is the fraction?
Step-by-step explanation:
Answer:
4\pm\sqrt{19}
Step-by-step explanation:
Move everything to left side
![x^{2} -8x -3 =0](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-8x%20-3%20%3D0)
Now to solve this square equation we need to find Descriminant
![D=b^{2} -4ac=64+12=76](https://tex.z-dn.net/?f=D%3Db%5E%7B2%7D%20-4ac%3D64%2B12%3D76)
As Descriminant D is greater than 0 then we have 2 solutions which we can calculate by this formula
![x_{1,2}=\frac{-b\pm\sqrt{D}}{2a} =\frac{8\pm2\sqrt{19}}{2}=4\pm\sqrt{19}](https://tex.z-dn.net/?f=x_%7B1%2C2%7D%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7BD%7D%7D%7B2a%7D%20%3D%5Cfrac%7B8%5Cpm2%5Csqrt%7B19%7D%7D%7B2%7D%3D4%5Cpm%5Csqrt%7B19%7D)
Answer:
63
Step-by-step explanation:
pie multiply 2 sq. 2 multiply with 5