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11Alexandr11 [23.1K]
2 years ago
10

Help me please please please

Mathematics
1 answer:
koban [17]2 years ago
6 0

Answer:

16 : 1

Step-by-step explanation:

RBC : platelets = 640 : 40

=> 16 : 1

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This is a value of the variable that makes the equation a true statement
Ratling [72]
That would be called the solution
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3 years ago
Solve 4(r+1.9)-9r=12.2 r= type integer or decimal rounded to the nearest hundredth as needed
zimovet [89]
<span>4(r+1.9)-9r=12.2
</span><span>4r + 7.6 -9r = 12.2
-5r = 12.2 - 7.6
-5r = 4.6
r = 4.6/-5
r = - 0.92</span>
6 0
3 years ago
Part C
charle [14.2K]

Answer:

(x,y+7)

Step-by-step explanation:

A translation means you are moving the image a certain amount of units, in this case, 7 units up. Since x values are all horizontal x does not change, but all y values will be 7 units higher.

For example (1,2) becomes (1,9).

8 0
3 years ago
A random sample of 49 statistics examinations was taken. the average score, in the sample, was 84 with a variance of 12.25. the
tester [92]

Since in this case we are only using the variance of the sample and not the variance of the real population, therefore we use the t statistic. The formula for the confidence interval is:

<span>CI = X ± t * s / sqrt(n)                      ---> 1</span>

Where,

X = the sample mean = 84

t = the t score which is obtained in the standard distribution tables at 95% confidence level

s = sample variance = 12.25

n = number of samples = 49

From the table at 95% confidence interval and degrees of freedom of 48 (DOF = n -1), the value of t is around:

t = 1.68

 

Therefore substituting the given values to equation 1:

CI = 84 ± 1.68 * 12.25 / sqrt(49)

CI = 84 ± 2.94

CI = 81.06, 86.94

 

<span>Therefore at 95% confidence level, the scores is from 81 to 87.</span>

6 0
3 years ago
Help me please please dont answer if you don’t know i will also give brainliest
BlackZzzverrR [31]

Answer:

$100.75

Step-by-step explanation:

422.05 - 106.30 - 310.00 + 95.00 = 100.75

3 0
3 years ago
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