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3 years ago

Idk what to do.Please help me!

Mathematics

2 answers:

dybincka [34]3 years ago

8 0

$\frac{3}{4} \frac{9}{x}$ = $\frac{27}{4}$

storchak [24]3 years ago

5 0

The x is 4 and the answer is 36/4 because 9 is a whole and we have to divide it.

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Equation y=0.25x+10 explain in words what each letter and number on your equation means

enot [183]

The 0.25 is the rate of change per each time. the 10 is what it started it

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3 years ago

Solve this multistep equation 12-5-16+3x=-23-9x

allsm [11]

The answer is x= -6/7

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3 years ago

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sesenic [268]

Answer:

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Step-by-step explanation:

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2 years ago

(x-1)(x-3)(x+5)(x+7)=297

mihalych1998 [28]

First simplify the expression into polynomial form,

$(x-1)(x-3)(x+5)(x+7)=297$

$x^4+8x^3-10x^2-104x+105=297$

$x^4+8x^3-10x^2-104x-192=0$

Now factor into,

$(x-4)(x+8)(x^2+4x+6)=0$

Which means the solutions are,

$x-4=0\implies\boxed{x_1=4}$

$x+8=0\implies\boxed{x_2=-8}$

and then two complex solutions because determinant of the third factor $D\lt0$ ,

$x^2+4x+6=0$

$x^2+4x+4=-2$

$(x+2)^2=-2\implies\boxed{x_3=i\sqrt{2}-2},\boxed{x_4=-i\sqrt{2}-2}$

Hope this helps :)

5 0

3 years ago

Read 2 more answers

Approximately 54% of mathematics students do their homework on time. In a class of 250 students, what is the mean, variance, and

sleet_krkn [62]

Answer:

A) Mean = 135 Variance = 62 Standard Deviation = 8

Step-by-step explanation:

Given that :

Proportion (p) = 54%

Sample size (n) = 250

Using Normal approximation :

Mean = np

Mean = 250 * 0.54 = 135

Variance = npq ; q = 1 - p = 1 - 0.54 = 0.46

Variance = (250 * 0.54 * 0.46) = 62.1 = 62

Standard deviation = √variance = √62.1

Standard deviation = 7.8803553 = 8

6 0

3 years ago