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Jet001 [13]
3 years ago
11

Can someone help me with the math problem -3/7+(-9)=

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

−66/7(Decimal: -9.428571)

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8 is 50% 0f what number
mars1129 [50]
'is' in mathematics means equal
'of' in mathematics means multiplication

Translating 8 is 50% of what number into an equation, we get:

8 = 50% * x

50%, or 50 percent, is nothing but 50 over 100 or 50/100, which is the same as 1/2.

8 = 1/2 * x

Multiply 2 on both sides.

8 * 2 = 1/2 * 2 * x

16 = x

x = 16

8 is 50% of 16.
3 0
3 years ago
Read 2 more answers
According to a recent study, 1 in every 10 women has been a victim of domestic abuse at some point in her life. Suppose we have
vitfil [10]

Answer:

The probability that more than 22 of the women sampled have not been the victim of domestic abuse is P=0.537.

Step-by-step explanation:

This problem can be modeled by a binomial random variable.

The probability p can be calculated as the proportion of women that <em>has not</em> been a victim of domestic abuse at some point in her life:

p=1-\dfrac{X}{n}=1-\dfrac{1}{10}=1-0.1=0.9

The sample size is n=25.

We want to calculate the probability that more than 22 of the women of the sample have not been victim of domestic abuse.

The probability that exactly k women have not been victim of domestic abuse can be calculated as:

P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{25}{k} 0.9^{k} 0.1^{25-k}\\\\\\

Then, the probability that more than 22 of the women sampled have not been the victim of domestic abuse is:

P(x>22)=P(x=23)+P(x=24)+P(x=25)\\\\\\P(x=23) = \dbinom{25}{23} p^{23}(1-p)^{2}=300*0.089*0.01=0.266\\\\\\P(x=24) = \dbinom{25}{24} p^{24}(1-p)^{1}=25*0.08*0.1=0.199\\\\\\P(x=25) = \dbinom{25}{25} p^{25}(1-p)^{0}=1*0.072*1=0.072\\\\\\\\P(x>22)=0.266+0.199+0.072=0.537

4 0
3 years ago
2 (y-1) ≥8 <br><br> please answer
professor190 [17]

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form:

y ≥ 5

Step-by-step explanation:

Distribute

2y - 2 = 8

     +2.     +2

2y/2 = 10/2

y = 5

7 0
3 years ago
If a tower casts a shadow 11 feet long the distance from the top of the tower to the end of the shadow is 61 feet .. How many fe
Alexeev081 [22]
Pythagorean theorem
the shadow legnth=bottom leg
legnth from top of tower to end of shadow=hypotounuse
height of tower=vertical leg

a^2+b^2=c^2
a and b are legs
c=hypotonuse

11^2+b^2=61^2
121+b^2=3721
minus 121 both sides
b^2=3600
sqrt both sides
b=60

height of toer is 60 feet
3 0
3 years ago
Given: F = {(0, 1), (2, 4), (4, 6), (6, 8)} and G = {(2, 5), (4, 7), (5, 8), (6, 9), (7, 5)} Find the common domain of F and G.
Ann [662]

Answer:

{ 2, 4, 6 }

Step-by-step explanation:

These are the only x values that F and G have in common.

7 0
4 years ago
Read 2 more answers
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