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iren2701 [21]
3 years ago
5

Please help me with this one​

Mathematics
1 answer:
devlian [24]3 years ago
7 0

Answer: Choice D

  • k < 5
  • Graph has an open hole at 5 and shading to the left

============================================================

Explanation:

We solve this as if it were an equation. In other words, we follow the same sort of steps.

To solve k - 3 = 2, we add 3 to both sides getting k = 5

So solving k - 3 < 2 leads to k < 5. The inequality sign does not flip.

To graph k < 5, we will plot an open hole at 5 and shade to the left

The open hole means we do not include 5 as part of the solution set. The graph visually represents all values smaller than 5.

This all leads to choice D being the final answer.

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The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 day
fenix001 [56]

Answer:

a) 279 b)254

Step-by-step explanation:

Mean = 269 days

standard deviation = 8 days

let n be the pregnancy lenght.  

using normal distribution formula

z = (n – mean)/ standard deviation

n = z * standard deviation + mean

Now, z values for the top 12% has to be found using a z table.

The top 12% means 88% of area under the curve. In this case z = 1,176

n = 1,176 * 8 + 269

n = 278.4 = 279

The bottom 3% means 97% of area under the curve. In this case z = -1,882

n = -1,882 * 8 + 269

n = 253.94 = 254

6 0
4 years ago
Kristen has 64 coins in her bank. She has $9.25 in dimes and quarters. How many dimes and quarters does she have?
Stella [2.4K]
D= # of dimes
q= # of quarters

QUANTITY EQUATION:
d + q= 64

COST EQUATION:
0.10d + 0.25q= $9.25


STEP 1:
multiply quantity equation by -0.10 to be able to eliminate the d term in step 2

(-0.10)(d + q)= (-0.10)(64)
-0.10d - 0.10q= -6.40


STEP 2:
add equation from step 1 to cost equation to eliminate the d term and solve for q

Add
0.10d + 0.25q= $9.25
-0.10d - 0.10q= -6.40

0.15q= 2.85
divide both sides by 0.15

q= 19 quarters


STEP 3:
substitute q value in step 2 into either original equation to find d value

d + q= 64

d + 19= 64
subtract 19 from both sides

d= 45 dimes


CHECK:
0.10d + 0.25q= $9.25
0.10(45) + 0.25(19)= 9.25
4.50 + 4.75= 9.25
9.25= 9.25


ANSWER: There are 45 dimes and 19 quarters.

Hope this helps! :)
7 0
4 years ago
I Need Help Please And This Is Due In 1 Hour
alex41 [277]

So the first one is 1 square meter of ceiling, and it says 1 square meter of cieling is 10.75. <em>So the first one is just that, 10.75</em>

The second one says 10 square meters, so just multiply 10.75, by 10.

In which case you get <em>107.5.</em> So that's the answer.

Third one, it gives you how many ceiling tiles you have. So you divide the 100 tiles by 10.75, which gives you 9.30232558, which becomes <em>9.3</em>

I'm sure you can figure out the last one.

7 0
3 years ago
If the population of a country grows at a rate of approximately 5 percent per year, the number of years required for the populat
iogann1982 [59]
THe number of years would be 20 years.
8 0
3 years ago
James has $10 less than three times the amount Amy has. Which expression represents James' amount if Amy has d dollars?
nignag [31]

Answer: 30

Step-by-step explanation:

10 x 3 = 30

It might be wrong but I wanted to try it so don’t you my answer.

4 0
3 years ago
Read 2 more answers
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