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larisa [96]
3 years ago
6

If 6x=23^2-17^2 then what is xPLSS HELP I AM WEAK IN MATHEMATICS​

Mathematics
1 answer:
jasenka [17]3 years ago
4 0

Step-by-step explanation:

6x = 23² - 17²

6x = (23 + 17)(23 - 17)

6x = 40 * 6

Hence x = 40.

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What are the dimensions of a rectangle with an area of 304 and a perimeter of 70?
Hitman42 [59]
Area = 304 cm^2
perimeter = 70
perimeter = 2(l+w)
70 = 2(l+w)
70/2 = l+w
35 = l+w
Now suppose the length would be = x
width would be= 35-x
NOW Area = l*w
304 = x * (35-x)
304 = 35x -x^2
x^2-35x+304 = 0 
use quadratic formula to solve next ok 
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5 0
3 years ago
-3/7*(-8)= plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Sindrei [870]

Answer:

3.42857143

Step-by-step explanation:

8 0
3 years ago
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What number is halfway between 60and 70
tatuchka [14]

Answer:

65

Step-by-step explanation:

70 - 60 = 10

10 / 2 = 5

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5 0
3 years ago
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The ratio of red cars to blue cars in a parking lot was 5:3 if there were 40 red cars how many blue cars would there be
AveGali [126]

Answer:

24 blue cars

Step-by-step explanation:

Set up a proportion to solve this...

40/5 = x/3      (forty red cars is to five red cars as 'x' number of blue cars is to 3 blue cars)

Now solve by cross multiplying...

120 = 5x

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6 0
3 years ago
If students’ scores were normally distributed and the mean was 200 with a standard deviation of 40, then what is the probability
Sonja [21]

Answer:

  84%

Step-by-step explanation:

The empirical rule tells you that 68% of the standard normal distribution is within 1 standard deviation of the mean. The distribution is symmetrical, so the amount in the lower tail is (1 -68%)/2 = 16%.

Since the number you're interested in, 240, is one standard deviation above the mean (200 +40), the percentage of interest is the sum of the area of the central part of the distribution along with the lower tail:

  68% + 16% = 84%.

4 0
3 years ago
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