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3 years ago

Help me with this question

Mathematics

2 answers:

VMariaS [17]3 years ago

8 0

C 60

Step-by-step explanation:

110 minus 50 equals 60

( my mistake for the last answer )

kondaur [170]3 years ago

3 0

Answer:

Its C

Step-by-step explanation:

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A basket contains 13 pieces of fruit five apples five oranges and three bananas Jonas takes piece of fruit at random from the ba

umka2103 [35]

Answer:1 out of 13

Step-by-step explanation:

because you take both of them and add them together and if one gets a banana and the other one gets an orange that will be one out of thirteen

7 0

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

3 years ago

Muiltiply 8x^2(x^2+2xy-6y^2) simplify your answer

stepladder [879]

The answer would be 8x^4 + 16x^3y - 48x^2y^2

In order to find this, multiply 8x^2 by each term individually.

8x^2 * x^2 = 8x^4

8x^2 * 2xy = 16 x^3y

8x^2 * -6y^2 = -48x^2y^2

Now you can put them all in a row.

8x^4 + 16x^3y - 48x^2y^2

3 0

3 years ago

Choose the expression that is equivalent to 12p2-2/5(5p2-10)+3p

Margarita [4]

Answer:

$10p^2+3p+4$

Step-by-step explanation:

$12p^2-\frac{2}{5} (5p^2-10)+3p\\12p^2-0.4 (5p^2-10)+3p\\12p^2-2p^2+4+3p\\10p^2+3p+44$

8 0

3 years ago

What is the measure arc PD?<br> a) 35°<br> b) 90°<br> c) 110°<br> d) 180°

solmaris [256]

Answer:

c) 110°

Step-by-step explanation:

Arc FP is twice the measure of the marked angle, so is 70°. If FD is supposed to be a diameter, then arc FPD is a semicircle (180°) and arc PD is 180° -70° = 110°.

7 0

3 years ago