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3 years ago

????A - k = w + v, for a

Mathematics

1 answer:

sladkih [1.3K]3 years ago

6 0

A=w+v/-k or A=w+v+k, but I mostly recommend the first one, the -k is divided by both the w and v.

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A line with an undefined slope that has an x-intercept of 9

lesantik [10]

A vertical line has an undefined slope.
vertical lines are X= something
in this case it needs to intercept 9.
so it is X=9

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3 years ago

Read 2 more answers

A drawing of the state of Utah is 7 cm tall and 5.4 cm wide. If the scale used to create the drawing was 1 cm to 50 miles, how m

Ksivusya [100]

Answer:

Step-by-step explanation:

4 0

3 years ago

Assume that in a particular military exercise involving two units, Red and Blue, thereis a 60 % chance that the Red unit will su

Marysya12 [62]

Answer: a) There are 42% chances that both units will meet their objectives.

b) There are 88% chances that one or the other but not both of the units will be successful.

Step-by-step explanation:

Since we have given that

Probability that the Red unit will successfully meet its objectives = 60% = P(R)

Probability that Blue unit will successfully meet its objectives = 70% = P(B)

Probability that only Red unit will be successful = P(only Red) = 18%

As we know that

$P(only\ red)=P(R)-P(R\cap B)\\\\0.18=0.60-P(R\cap B)\\\\0.18-0.60=-P(R\cap B)\\\\-0.42=-P(R\cap B)\\\\P(R\cap B)=42\%$

Hence, there are 42% chances that both units will meet their objectives.

the probability that one or the other but not both of the units will be successful is given by

$P(R\cup B)=P(R)+P(B)-P(R\cap B)\\\\P(R\cup B)=0.60+0.70-0.42\\\\P(R\cup B)=0.88\\\\P(R\cup B)=88\%$

Hence, there are 88% chances that one or the other but not both of the units will be successful.

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3 years ago

Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er

Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

$n= p(1-p)(\dfrac{z^*}{E})^2$ , where E= margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

$n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2$

$n= 0.20(0.80)(116.5)^2$

$n= 2171.56\approx2172$

Hence, the required sample size = 2172

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3 years ago

At what point in the order of operations should you simplify exponents in an expression?

Tamiku [17]

Second step
PEMDAS
Parenthesis exponents division addition subtraction

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3 years ago