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Mandarinka [93]
3 years ago
6

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
8 0
3 years ago
Solve this multistep equation <br>12-5-16+3x=-23-9x
allsm [11]
The answer is x= -6/7<span><span>​​</span></span>
3 0
3 years ago
Please see the screenshot.
sesenic [268]

Answer:

the answer is c, (-10,4) and the radius is 10

Step-by-step explanation:

Hope this helps!❆

6 0
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
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