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Greeley [361]
2 years ago
12

Need help with math test ASAP please

Mathematics
1 answer:
MaRussiya [10]2 years ago
6 0

Answer:

stop cheating on your tests

Step-by-step explanation:

Brainly is not meant for cheating

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What is the value for x in this equation?<br> 42x – 3 = 7.27
Flauer [41]

x = 0.2445238 is the only answer I found.
6 0
3 years ago
Read 2 more answers
A group of 3 adults and 5 children pay a total of 52$ for movie tickets
Paladinen [302]

Answer:

  • $9 adult
  • $5 child

Step-by-step explanation:

Letting "a" and "c" represent the costs of adult tickets and child tickets, the problem statement gives us two relations:

  3a +5c = 52

  2a +4c = 38

__

We can solve this system of equations using "elimination" as follows:

Dividing the first equation by 2 we get

  a +2c = 19

Multiplying this by 3 and subtracting the first equation eliminates the "a" variable and tells us the price of a child ticket:

  3(a +2c) -(3a +4c) = 3(19) -(52)

  c = 5 . . . . . . collect terms

  a +2·5 = 19 . . substitute for c in the 3rd equation above

  a = 9 . . . . . . subtract 10

One adult ticket costs $9; one child ticket costs $5.

6 0
3 years ago
Graph the line that passes through (2,5), parallel to the graph of 1.4x 8.5y=-3
lions [1.4K]
Turn the eqation into slope intercept form (y=mx+b)
solve 4 y
graph it
then plot your points and make it parrellel
8 0
3 years ago
9. Seven less than twice a number is 43 Equation: Solution
GrogVix [38]

Answer:the number is 25

Step-by-step explanation:

2a-7=43

Collect like terms

2a=43+7

2a=50

Divide both sides by 2

2a/2=50/2

a=25

3 0
3 years ago
The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 91 inches, and a standard d
Vesna [10]
The sample std. dev. will be (14 inches) / sqrt(49), or (14 inches) / 7, or 2 inches.

Find the z score for 93.8 inches:
       93.8 inches - 91.0 inches          2.8 inches
z = ------------------------------------- = ----------------- = 1.4
                    2 inches                         2 inches

Now find the area under the standard normal curve to the left of z = +1.4.

My calculator returns the following:

normalcdf(-100,1.4) = 0.919.  This is the probability that the mean annual precipitation during those 49 years will be less than 93.8 inches.
 
4 0
3 years ago
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