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Gwar [14]
3 years ago
5

Olivia is adding the numbers 25, 35, and 9. She wants to make a ten to add. Which ones digits does Olivia add first?

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0

Answer:

35+25

Step-by-step explanation:

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95 points need help match these to each other please
krek1111 [17]

Answer:

1. Least common multiple

2. Least common denominator

3. multiple

4. solve

5. solution

Step-by-step explanation:

5 0
3 years ago
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If a=.3 and b=.5, what is the value of a=b ?
Elan Coil [88]

Answer:

5.0/5.

Step-by-step explanation:

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3 years ago
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Refer to the Teaching Psychology (May 1998) study of how external clues influence performance. Two different forms of a midterm
kozerog [31]

Answer:

P(X

P(Y

So for this case we have a higher probability for the red exam so we can conclude that the student is more likely to score below 20% on the difficult questions in the red one.

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores for the blue exam, and for this case we know the distribution for X is given by:

X \sim N(53,15)  

Where \mu=53 and \sigma=15

We are interested in the probability that P(X<20%)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

And if we replace we got:

P(X

Let Y the random variable that represent the scores for the red exam, and for this case we know the distribution for X is given by:

Y \sim N(39,12)  

Where \mu=39 and \sigma=12

We are interested in the probability that P(Y<20%)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{y-\mu}{\sigma}

And if we replace we got:

P(Y

So for this case we have a higher probability for the red exam so we can conclude that the student is more likely to score below 20% on the difficult questions in the red one.

7 0
3 years ago
15 points Composition of Functions
Paul [167]

Answer:

last option

Step-by-step explanation:

8 0
3 years ago
PLEASE SHOW WORK I WILL GIVE BRAINLIEST!!!<br><br> x-2y-2z=2<br> 5x+2y-4z=-2<br> -5y-5z=0
mafiozo [28]

Step-by-step explanation:

lets separate z from each equation

2z=x-2y-2

4z=5x+2y+2

5z=-5y

so

z=x/2-y-1

z=5x/4+y/2+1/2

z=-y

lets use the first and third equation

we have z=-y we replace this z at the first equation

-y=x/2-y-1 so x/2-1=0

x/2=1

x=2

now we replace z=-y and x=2 at the second equation so

-y=5*2/4+y/2+1/2

-y/2-y=5/2+1/2

-3y/2=6/2

-3y/2=3

-y/2=1

y=-2

we know that z=-y

so z =-(-2)=2

finaly we have that

x=2 ,y=-2 ,z=2

7 0
3 years ago
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