Step-by-step explanation:
b. 3x + 7y = 7
b. 3x + 7y = 75x − 7y = −63
Both the equations have common coordinate point (-7,4)
3x + 7y = 7
LHS = 3(-4)+7(4)= -21+28= 7. RHS = 7
Therefore, the equation satisfies.
5x − 7y = −63
LHS = 5(-7)-7(4) = -35-28= -63. RHS = -63
Therefore, the equation satisfies.
Answer:
0.31
Step-by-step explanation:
Given an ill person exhibits the symptoms H, find the probability that the person has illness I1.
So in other words, we need to find P (I1 | H).
We will make use of Baye's rule.
P (I1 | H) =
P(H) can be calculated using total law of probability.
P(H) = P (H | I1)*P(I1) + P (H | I2)*P(I2) + P (H | I3)*P(I3)
= (0.90)(0.01) + (0.95)*(0.05) + (0.75)*(0.02)
= 0.009 + 0.00475 + 0.015 =0.02875
P (H | I1)*P(I1) = (0.90)(0.01) = 0.009
so
P (I1 | H) = = = 0.31
Answer:
Jessica bought 2.25 yards more fabric.
Step-by-step explanation:
For Jessica we will consider 5 to be 100% which is 1 in decimals (100÷100=1) of what she bought originally and since she bought 20% (which is 0.20 in decimals 20÷100=0.20) more then we have 100% + 20% = 1 + 0.20 = 1.20 of our original 5. So now we multiply 5×1.20=6, so Jessica bought 6 yards.
Similarly we have Dan who bought 3 yards plus 25% more. Well 25% is 0.25 and so: 100% + 25% = 125% = 1.25. Now, we will multiply 3 × 1.25 = 3.75 yards. Therefore, Jessica bought more fabric. How much more? 6 - 3.75 = 2.25 yards more.
Answer:
4.8
Step-by-step explanation:
<span>Not even one.
2/5 is only 4/5 of a full half.
<span><span /></span></span>
<span>To find that answer, divide 2/5 by 1/2 .</span>