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1 year ago

10 is 4% of what number

Mathematics

1 answer:

trasher [3.6K]1 year ago

7 0

EXPLANATION

Dividing 10 by 4 (4%=0.04) and multiplying by 100 give us the corresponding 100% number as shown as follows:

$10\cdot\frac{100}{4}=250$

The answer is 250

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I need help, i don't understand

devlian [24]

Answer:

Step-by-step explanation:

the sum of the angles is 360 degrees

you have 3 angles equal to 91

91*3=273

360-273=87

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3 years ago

A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey

Lubov Fominskaja [6]

Answer:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

Step-by-step explanation:

For this case we have the following distribution given:

X 0 1 2 3 4 5 6

P(X) 0.3 0.25 0.2 0.12 0.07 0.04 0.02

For this case we need to find first the expected value given by:

$E(X) = \sum_{i=1}^n X_i P(X_I)$

And replacing we got:

$E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61$

Now we can find the second moment given by:

$E(X^2) =\sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97$

And the variance would be given by:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

8 0

4 years ago

What is the completely factored form of x3 â€"" 64x? x(x â€"" 8)(x â€"" 8) (x minus 4) (x squared 4 x 16) x(x â€"" 8)(x 8) (x â€

Vadim26 [7]

The factored form of an equation is done by rewriting the equation in simpler forms.

The completely factored form of $x^3 - 64x$ is $x(x-8)(x + 8)$

The expression is given as:

$x^3 - 64x$

Factor out x from the expression, $x^3 - 64x$

$x^3 - 64x = x(x^2-64)$

Express 64 as 8^2

$x^3 - 64x = x(x^2-8^2)$

Express the expression as a difference of two squares

$x^3 - 64x = x(x-8)(x + 8)$

Hence, the completely factored form of $x^3 - 64x$ is $x(x-8)(x + 8)$