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arlik [135]
3 years ago
10

Please help. Show work please

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
6 0
3{[9(x - 2) + 7] - 2[4(x + 5) - 36]}

= 3[9x - 18 + 7 - 2(4x + 20 - 36)]

= 3(9x - 11 - 8x - 40 + 72)

= 3(x + 21)

= 3x + 63
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9-6=3, 6+3=9, 3+6=9 what is the missing fact family?
Taya2010 [7]

Answer:

<em>9-3=6</em>

Step-by-step explanation:

An addition/subtraction fact family has 2 addition equations and 2 subtraction ones.

The question already states both addition ones, but only one subtraction

The subtraction one stated is 9-6=3

The opposite is<em> 9-3=6</em>

<u>Hope this helps :-)</u>

7 0
4 years ago
On Monday, Raven ran 2 3 4 miles; Tuesday, 2 3 5 miles; Wednesday, 2 1 2 miles; Thursday, 2 5 8 miles; and Friday, 2 7 10 miles.
melisa1 [442]

Do you add them?? or is it multyplying 2 3 and 4??



5 0
3 years ago
Read 2 more answers
The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 250.8 and a standard deviation of
Iteru [2.4K]

Answer:

a) 68%; b) 99.5%

Step-by-step explanation:

The empirical rule states that 68% of data falls within 1 standard deviation of the mean; 95% of data falls within 2 standard deviations of the mean; and 99.7% of data falls within 3 standard deviations of the mean.

For part a,

We are asked the approximate percentage of women whose platelet counts are within 1 standard deviation of the mean.  According to the empirical rule, this is 68%.

For part b,

We are given the endpoints of the interval.  The lower endpoint is 181.5; this is 250.8-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is 2 standard deviations away from the mean.

The higher endpoint is 320.1; this is 320.1-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is standard deviations away from the mean.

This means this interval includes about 95% of women.

4 0
3 years ago
5
podryga [215]

Answer:

C-7.4

Step-by-step explanation:

just took the test EDG2020

3 0
3 years ago
Read 2 more answers
A center-pivot sprinkler system operated by Colorado Land &amp; Agriculture, Inc., is used to water the alfalfa in a circular fi
omeli [17]

Answer:

The answer is "1.448 miles".

Step-by-step explanation:

X= The distance to both the nozzle clogged from of the starting point.

X \sim Uniform(0,2) miles.

They are simulating the random number Y=0.724, and the Y has both a distribution uniform(0,1). Therefore 2Y is distributed evenly (0.2). And They model the clogging of its nozzle at 2Y=1.448 miles

8 0
3 years ago
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