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o-na [289]
3 years ago
11

If ABC is reflected across the y-axis, what are the coordinates of A’?

Mathematics
2 answers:
almond37 [142]3 years ago
5 1
A lies on (1,3) a reflection across the y-axis is (x,y) to (-x,y). The x turns the opposite and y stays the same so...

(-1,3)
Stells [14]3 years ago
3 1
-1,3 is the answer hope it helped
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HELP!!! 100 POINTS ANSWER FAST
Viktor [21]

Answer:

  • (x - 4)^2 = 9

Step-by-step explanation:

<u>Completing the square</u>

  • x^2 - 8x + 7 = 0
  • x^2 - 2*4x + 16 - 9 = 0
  • (x^2 - 2*4x + 4^2) = 9
  • (x - 4)^2 = 9

<u>The blanks are</u>

  • - 4 and 9
4 0
3 years ago
Read 2 more answers
Some IQ tests are standardized to a Normal model N(100,19). What is the cutoff value for the top 5% of all IQs
Montano1993 [528]

Answer:

The cutoff value for the top 5% of all IQs is 131.255.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 100, \sigma = 19

What is the cutoff value for the top 5% of all IQs

This is the 100 - 5 = 95th percentile, which is X when Z has a pvalue of 0.95. So X when Z = 1.645.

Z = \frac{X - \mu}{\sigma}

1.645 = \frac{X - 100}{19}

X - 100 = 19*1.645

X = 131.255

The cutoff value for the top 5% of all IQs is 131.255.

8 0
2 years ago
How many are 13 x 13 ?​
mote1985 [20]

Answer:

169

Step-by-step explanation:

13*13=169

We can split the two 13's up:

(10+3)(10+3)

Multiply 10 with 10, 10 with 3, 3 with 10, and 3 with 3.

Basically, just multiply every single term together.

100+30+30+9

100+69

169

Hope this helps!

8 0
3 years ago
Read 2 more answers
What are the x- and y- coordinates of point E, which partitions the directed line segment from A to B into a ratio of 1:2?
nasty-shy [4]

Answer:

(1,4\frac{1}{3})

Step-by-step explanation:

The coordinates of A and B are missing in the question

Assuming point A is at (1,2) and B is at (1,9) then the coordinates of that partitions AB in the ratio m:n=1:2 is given by:

(\frac{mx_2+nx_1}{m+n},\frac{my_2+ny_1}{m+n})

We substitute the values to get:

(\frac{1 \times 1+2 \times 1}{1+2},\frac{1 \times 9+2 \times 2}{1+2})

We simplify to get:

(\frac{1+2 }{3},\frac{13}{3})

(\frac{3 }{3},\frac{13}{3})

(1,4\frac{1}{3})

5 0
3 years ago
Read 2 more answers
I don't get this at all.
gogolik [260]
If she has 3 cheeses and wants to bring in cheese for 12 days she has 3 and splits it up into 12 days so thats 3/12 which is 0.25 per day
8 0
3 years ago
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