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Ede4ka [16]
3 years ago
13

Which of these numbers is a prime number 1,11,21,51

Mathematics
1 answer:
Vlad [161]3 years ago
3 0
Im pretty sure its 11
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Write the equation of a line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​).
Fantom [35]

Answer:  y = -(9/5)x - 1

Step-by-step explanation:

Rewrite the equation in standard form:  y = (5/9)x+(8/9).  [y=mx+b]

A line perpendicular to this would have a slope that is the negative inverse of the original slope (5/9), which would make it -(9/5).  The y-intercept would also change, but we don't know the value, yet.  For now, we'll use "b" for the y-intercept.  This results in a perpendicular line:

y = -(9/5)x + b

We can calculate b, the y-intercept, by using the point (-5,8) and solving for b.

8 = -(9/5)*(-5) + b

8 = (9) + b

b = -1

The line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​) is

y = -(9/5)x - 1

7 0
2 years ago
The temperature fell by 15 degrees Fahrenheit today.
katrin2010 [14]
<h3>Answer is   -15</h3>

We read this out as "negative 15" or you could write "negative fifteen".

The negative indicates the temperature went down. It doesn't necessarily mean that the final temperature is -15 degrees.

For example, if it starts being 50 degrees F, and drops by 15 degrees, then 50+(-15) = 50-15 = 35 degrees is the temperature after that drop. It might help to use a vertical number line.

8 0
3 years ago
a Textbook weighs 2.5 pounds. how many kilograms does the textbook weigh? round your answer to the nearest tenth of a pound. one
Rzqust [24]
If you round it to the nearest pound it is 1.1 kg
2.5/2.2 = 1.13....
3 0
3 years ago
Read 2 more answers
A survey of 600 randomly selected high school students determined that 290 play organized sports. what is the probability that a
blsea [12.9K]

Answer:

29/60

Step-by-step explanation:

probability of playing is 290/600 which when simplified is29/60

5 0
1 year ago
16x^2-12x=54. Find the real solutions.
ELEN [110]
Yes just do that.................... ....m
5 0
3 years ago
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