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irakobra [83]
3 years ago
11

A perfect is to be chosen from a class of 12 girls and 8 boys. What is the probability that the prefect is a girl?​

Mathematics
2 answers:
maxonik [38]3 years ago
8 0

Answer: 12/20

Step-by-step explanation:

sineoko [7]3 years ago
8 0
Hopes this helps:

Answer: 8/15

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Jax has a weekly math test. His scores on the last 5 tests are 78,92,86,94,95. What score does he need to have an average of 90
lara [203]

Answer:

x = 95

Step-by-step explanation:

Given that,

Jax scores on the last 5 tests are 78,92,86,94,95.

We need to find the score he need to have an average of 90.

The formula for average of few number is given by :

Average = sum of observations/total no of observation

Let he score x in test 6. So,

90=\dfrac{78+92+86+94+95+x}{6}\\\\90=\dfrac{445+x}{6}\\\\540=445+x\\\\x=95

So, he must score 95 in the next test so that its average is 90.

5 0
3 years ago
What is the factored form of the following expression?<br> x^2-10xy+21y^2
valentinak56 [21]
The answer would be (x-3y) (x-7y)
You have to group them together
4 0
3 years ago
Its attachedddddddddddddddd
harkovskaia [24]

Answer:

i think it's the last option

Step-by-step explanation:

y=mx+b

m=slope

b=y-intercept

3 0
3 years ago
Read 2 more answers
ack is in hospital and his temperature is recorded every hour one morning. Time Temperature 06:00 40.0 07:00 40.0 08:00 39.5 09:
sukhopar [10]
I would say a line graph is probably the best way (it is usually the normal way) so that you can see the fluctations in temperature. Time on the x-axis and temp on the y-axis
4 0
3 years ago
4.2...PLZZZZ I HAVE A 60 IN MATH HELP ME​
jeka94

Answer:

1:3

Step-by-step explanation:

It’s ratios.

A: 3

B: 9

   36

   129

C: x3

5 0
3 years ago
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