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Schach [20]
3 years ago
10

The scores on a standardized test are normally distributed with the mean of 750 and standard deviation 70. Find the probability

that a score is between 750 and 890.
2.28%


47.7%


50%


13.6%
Mathematics
2 answers:
mafiozo [28]3 years ago
3 0
Hey the answer is C.47.7 
goodluck!
UNO [17]3 years ago
3 0
Konichiwa! Len here
The answer is C.47.7  im vary sorry if the answer is incorrect! hope this helped!
Have a nice day 
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PLZ HELP WILL GIVE BRAINLIEST IF ANSWER CORRECTLY
lakkis [162]

Answer:

3 = y

Step-by-step explanation:

y = 1/2 * 6x

y = 3x

-3y = x

-3y as a constant is (3y)

6 0
2 years ago
The table shows the price p, for renting for a d days from a car rental company?
masha68 [24]

\bf \begin{array}{|cc|ll} \cline{1-2} \stackrel{Days}{d}&\stackrel{Price}{P}\\ \cline{1-2} 1&\$115\\ 2&\$150&\leftarrow 115+\stackrel{35(1)}{35}\\ 3&\$185&\leftarrow 115+\stackrel{35(2)}{35+35}\\ 4&\$220&\leftarrow 115+\stackrel{35(3)}{35+35+35}\\ d&&\leftarrow 115+35d\\ \cline{1-2} \end{array}~\hfill \stackrel{part~A}{P(d)=35d+115} \\\\\\ ~\hspace{34em}

part B)

the slope is always in a linear equation, the coefficient of the independent variable, in this case namely "35".

35 or 35/1  dollars/day means

for every passing day the car is rented out, the charge is $35, so if you rent the car "d" days, you'll be charged 35d.

7 0
3 years ago
The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.
Alinara [238K]

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

=4

Percentage=4÷15

=0.266666667

=26.667%

~27%

4 0
3 years ago
Plzzzzzzzzzzzzzzzzzzzzzzzz
lesantik [10]

Answer:

10x^2-11x-6

Step-by-step explanation:

To expand, we use the FOIL method. You do this by multiplying each number inside the parenthesis by the other numbers in the other set of the parenthesis. For example, on this problem, you would multiply 5x by 2x, and then 5x by -3.

Step by step, you would:

5x * 2x = 10x^2

5x * -3 = -15x

2 * 2x = 4x

2 * -3 = -6

In an equation, it would expand to 10x^2-15x+4x-6

To simplify, you add like terms (constants and those with the same variable). In this case, you would add together all the terms ending in x.

-15x+4x=-11x

Now, you have added like terms together, so your simplified answer is 10x^2-11x-6.

6 0
2 years ago
PLEASE HELP ASAP!!!!
adell [148]


The basic form of the equation is:
4p(x-h) = (y-k)2

(h,k) is the vertex


4(-0.5)(x-1.5) = (y-(-4))2
-2(x-1.5) = (y+4)2
-2(x-1.5) = y2 + 8y + 16
x - 1.5 = (-1/2)(y2 + 8y + 16)
x = (-1/2)y2 - 4y - 8 + 1.5
x = (-1/2)y2 - 4y - 6.5
4 0
3 years ago
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