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denis-greek [22]
3 years ago
10

Hannah and Francine have $120. Hannah and Peter have $230. Peter has 6 times as much money as Francine. How much money does Hann

ah have?
Mathematics
1 answer:
aivan3 [116]3 years ago
5 0
x-Francine's\ money\\6x-Peter's\ money\\120-x-Hanna's\ money\\\\120-x+6x=230\\-x+6x=230-120\\5x=110\ \ \ |:5\\x=22\\\\6x=6\cdot22=132\\\\120-22=98\\\\Hanna\ has\ \$98
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The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days.
Zarrin [17]
Let the lengths of pregnancies be X
X follows normal distribution with mean 268 and standard deviation 15 days
z=(X-269)/15

a. P(X>308)
z=(308-269)/15=2.6
thus:
P(X>308)=P(z>2.6)
=1-0.995
=0.005

b] Given that if the length of pregnancy is in lowest is 44%, then the baby is premature. We need to find the length that separates the premature babies from those who are not premature.
P(X<x)=0.44
P(Z<z)=0.44
z=-0.15
thus the value of x will be found as follows:
-0.05=(x-269)/15
-0.05(15)=x-269
-0.75=x-269
x=-0.75+269
x=268.78
The length that separates premature babies from those who are not premature is 268.78 days
8 0
3 years ago
4. The table below shows the cost of pencils at the local discount store. Cost of Pencils Number of Total Cost Pencils 10 $1.25
fomenos

Answer:

1.25 / 10 = 0.125

0.125 is about 0.13

13 cents or $0.13

4 0
2 years ago
Marcus purchased 75 shares of stock a year after the purchase the stock the valley of the cost is $2 less per share write a mult
lesya692 [45]
(2×70)+(2×5)=140+10=150. Think this work
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3 years ago
25 of blank is 60<br> enter the unknown value that makes it true
Svetradugi [14.3K]

Answer:

240

Step-by-step explanation:

25% of 240 is 60

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2 years ago
Please help me, im struggling plz
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