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CaHeK987 [17]
2 years ago
11

Use the 10 x 10 Grif to express the fraction 11/20 as a percent

Mathematics
1 answer:
Korolek [52]2 years ago
8 0
100% is a whole (1)
11/20 = (1 ÷ 20) x 11

1 ÷ 20
1 ÷ 2 is a half, so equals 0.5. So, move the decimal point to get 0.05.

0.05 x 11
5 x 11 = 55
When you change 0.05 to 5, you are moving the decimal 2 places. So, moving it 1 will give you 5.5, and then another will get you 0.55.

Your answer: 0.55!
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PLEASE HELP!!!!<br><br> f(x)= {____for____<br> {____for____
hammer [34]

9514 1404 393

Answer:

  f(x)=\left\{\begin{array}{ccc}3&\text{for}&-5\le x < 0\\1-x&\text{for}&0

Step-by-step explanation:

The left section is defined at x = -5, but not at x = 0, so the interval for that definition is -5 ≤ x < 0. The function value on that interval is constant: 3.

The right section is defined a x = 5, but not at x = 0, so the interval for that definition is 0 < x ≤ 5. That section is a straight line with a slope of -1 and a y-intercept of 1. The function value on that interval can be written -x+1.

Then the piecewise definition is ...

  f(x) = {3, for -5 ≤ x < 0; -x+1, for 0 < x ≤ 5}

8 0
2 years ago
How many solutions does the following system have?<br> y= 5x + 8<br> y = 5x + 3
NARA [144]

Answer:

This system has no solutions.

Step-by-step explanation:

If we try to solve:

  1. 5x + 8 = 5x + 3
  2. 5x + 8 - 3 = 5x
  3. 5x + 5 = 5x
  4. 5x - 5x + 5 = 5x - 5x
  5. 5 = 0

Since there are no x values left over and the remaining solution is zero, there is no solution for this equation.

Hope this helps!!

4 0
2 years ago
The daily dinner bills in a local restaurant are normally distributed with a mean of $28 and a standard deviation of $6. What ar
Degger [83]

Answer:

The minimum value of the bill that is greater than 95% of the bills is $37.87.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 28, \sigma = 6

What are the minimum value of the bill that is greater than 95% of the bills?

This is the 95th percentile, which is X when Z has a pvalue of 0.95. So X when Z = 1.645.

Z = \frac{X - \mu}{\sigma}

1.645 = \frac{X - 28}{6}

X - 28 = 6*1.645

X = 37.87

The minimum value of the bill that is greater than 95% of the bills is $37.87.

4 0
3 years ago
Line E passes through the points (2, 3) and (4, -3). What is the slope of a line perpendicular to line E?
lilavasa [31]
\bf \begin{array}{ccccccccc}&#10;&&x_1&&y_1&&x_2&&y_2\\&#10;%  (a,b)&#10;&&(~ 2 &,& 3~) &#10;%  (c,d)&#10;&&(~ 4 &,& -3~)&#10;\end{array}&#10;\\\\\\&#10;% slope  = m&#10;slope =  m\implies &#10;\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-3-3}{4-2}\implies \cfrac{-6}{2}\implies \cfrac{-3}{1}

now, a line perpendicular to that one, will have a "negative reciprocal" slope, thus

\bf \textit{perpendicular, negative-reciprocal slope for}\quad \cfrac{-3}{1}\\\\&#10;negative\implies  +\cfrac{3}{ 1}\qquad reciprocal\implies +\cfrac{ 1}{3}\implies \cfrac{1}{3}
7 0
3 years ago
Help me please beggin you
maw [93]
All we have to do is set this up!
we know that all he practiced altogether for 15 and 1/3 hours 
so lets put that down so far 
       1
15 -----  = 
       3
and he says that the first week he played 6 and 1/4 hours on the first week
now lets add that 
       1             1
15 -----  =  6 ----- +
<span>       3             4
</span>now we also know that he played 4 and 2/3 hours on the first week 
now lets add that 
       1             1            2
15 -----  =  6 ----- +  4 ----- +
<span>       3             4            3
</span>we arent finished yet!
now the third week we dont know how long he played so we are going to put x in its place 
       1             1            2
15 -----  =  6 ----- +  4 ----- + x 
<span>       3             4            3
</span>and there is your answer! finally...
hope this helps:) MARK AS BRAINLIEST!!!
:D

5 0
3 years ago
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