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ASHA 777 [7]
3 years ago
6

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

Mathematics
1 answer:
fiasKO [112]3 years ago
8 0

Answer: 30 boys 45 girls

Step-by-step explanation:

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A humanities professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below t
Musya8 [376]

Answer:

81

Step-by-step explanation:

Given data:

mean μ = 70.

standard deviation σ, 9.6.

P(Z < 1.123) = 0.13

z = 1.13

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x = z×σ +μ

Substitute the values in the above equation.

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7 0
3 years ago
1.Solve the differential equation dy/dx= y^2/x^3 for y=f(x) with the condition y(1) = 1.
Elza [17]
This ODE is separable, so you can write

\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{y^2}{x^3}\iff\dfrac{\mathrm dy}{y^2}=\dfrac{\mathrm dx}{x^3}

Integrating both sides gives

-\dfrac1y=-\dfrac1{2x^2}+C

and given the initial condition y(1)=1, you have

-\dfrac11=-\dfrac1{2(1)^2}+C\implies C=-\dfrac12

so that the solution is

-\dfrac1y=-\dfrac1{2x^2}-\dfrac12\implies y=\dfrac1{\frac1{2x^2}+\frac12}=\dfrac{2x^2}{1+x^2}
4 0
4 years ago
AB=45. If RT=3(x+9), what is the value of x?
Margaret [11]
6 because 45 divides by 3 equals 15 and fifteen minus 9 equals 6, if you plug 6 into the equation it makes sense
7 0
3 years ago
Read 2 more answers
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