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3 years ago

HELP !!

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

4 0

Answer:

Step-by-step explanation:

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1.) A florist sells bouquets for $12.25 each. Amiyah

deff fn [24]

Answer:

Step-by-step explanation:

6 0

3 years ago

Factor out the coefficient of the variable. 1/3b-1/3

BartSMP [9]

1/3b-1/3
factor out 1/3
1/3(b-1)

hope this helps

5 0

3 years ago

How many times does 37 go into 50

elena-s [515]

37 goes into 50 0.74 times

8 0

3 years ago

Mr. Dennis gave his class a 202020-question multiple choice quiz. The distribution of raw scores had a mean of 151515 and a stan

ArbitrLikvidat [17]

Answer:

75,62.5

Step-by-step explanation:

Given that Mr. Dennis gave his class a 20-question multiple choice quiz. The distribution of raw scores had a mean of 15 and a standard deviation of 2.5

If X is the correct questions in the 20 mcq then

X is with mean = 15 and std dev = 2.5

when score is multiplied by 5

random variable now is

Y = 5x

E(Y) = Mean of Y = $5*E(x) = 75$

$Var(Y) = Var(5x) = 25 var(x) = 25(2.5^2)\\Std dev (Y) = 25 (2.5) = 62.5$

Thus new score out of 100 would have mean = 75 and std deviation = 62.5

5 0

3 years ago

Write and equation of the translated or rotated graph in general form

german

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

That's a parabola, almost in vertex form:

$y = \frac 1 4 (x+3)^2$

The translation is

$(x',y') = T_{(-7,2)} (x,y) = (x-7, y+2)$

$x= x'+7, y=y'-2$

Substituting translates the graph. None of the choices have fractions so we substitute into the original form:

$(x'+7+3)^2=4(y'-2)$

We can drop the primes now and simplify,

$(x+10)^2=4(y-2)$

$x^2 + 20 x + 100 = 4y -8$

$x^2 + 20 x - 4y + 108 = 0$

Choice C.

This method generalizes nicely to rotations, reflections and other transformations.

6 0

3 years ago