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2 years ago

Hey i really need help its 11:32 where I am and this assignments due at 12:00please!!!!

Mathematics

2 answers:

USPshnik [31]2 years ago

7 0

%/100 =is/of
Good equation our teacher taught us and the one you’re looking for put x

pickupchik [31]2 years ago

3 0

Answer:

3: 67 5:200% 6: 50% 7: 32 8) 20

Step-by-step explanation:

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Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ =

Natali [406]

Answer: The proportion that will qualify is 0.0314 or 3.14%.

First, we need to find the z-score of a time of 128 seconds. To do this, we find the difference of the mean and score and divide by the standard deviation.

(128 - 141) / 7 = -1.86

Now, use a standard normal distribution table to determine the percent below a z-score of -1.86. That value is 0.0314 or 3.14%.

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3 years ago

Write the equation of a line where slope = 2 and (1,3) is on the line in slope intercept form

vazorg [7]

Y = 3x + 0 is what i got though check my math to be sure

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3 years ago

f(x) is a quadratic function with x-intercepts at (−1, 0) and (−3, 0). If the range of f(x) is [−4, [infinity]) and g(x) = 2x^2

iren2701 [21]

Answer with Step-by-step explanation:

We are given that function f(x) which is quadratic function.

x -intercept of function f(x) at (-1,0) and (-3,0)

x-Intercept of f means zeroes of f

x=-1 and x=-3

Range of f =[-4, $\infty$ )

g(x)= $2x^2+8x+6=2(x^2+4x+3)$

$g(x)=0$

$2(x^2+4x+3)=0$

$x^2+4x+3=0$

$x^2+3x+x+3=0$

$x(x+3)+1(x+3)=0$

$(x+1)(x+3)=0$

$x+1=0\implies x=-1$

$x+3=0\implies x=-3$

Therefore, x-intercept of g(x) at (-1,0) and (-3,0).

Substitute x=-2

$g(-2)=2(-2)^2+8(-2)+6=8-16+6=-2$

$g(x)=2(x^2+4x)+6$

$g(x)=2(x^2+2\times x\times 2+4-4)+6=2(x^2+2\times x\times 2+4)-8+6$

$g(x)=2(x+2)^2-2$

By comparing with the equation of parabola

$y=a(x-h)^2+k$

Where vertex=(h,k)

We get vertex of g(x)=(-2,-2)

Range of g(x)=[-2, $\infty$ )

Zeroes of f and g are same .

But range of f and g are different.

Range of f contains -3 and -4 but range of g does not contain -3 and -4.

f and g are both quadratic functions.

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3 years ago

Plz help me!!!!

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3 years ago

Over the summer, for every 12 okra seeds Dana planted, 7 grew into plants. If he planted 120 okra seeds, how many grew into plan

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The answer is 70 because

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3 years ago

Hey i really need help its 11:32 where I am and this assignments due at 12:00please!!!!​

Hey i really need help its 11:32 where I am and this assignments due at 12:00please!!!!