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4 years ago

Can someone please answer. There is only one question. There is a picture. Thank you!

Mathematics

2 answers:

tensa zangetsu [6.8K]4 years ago

6 0

It's the second choice I believe.

mrs_skeptik [129]4 years ago

5 0

There is a total of 10 marbles, of which 5 marbles are red.
$P(red)=\frac{5}{10}=\frac{1}{2}$
Therefore the second choice is the correct answer.

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In parallelogram ABCD, m∠B = 32 + 35 and m∠D = 52 + 13. Find m∠C.

AleksandrR [38]

Answer:

113°

Step-by-step explanation:

1) according to the condition m(∠B)=m(∠D)=67°;

2) m(∠C)=180°-m(∠B)=180°-m(∠D);

m(∠C)=180-67=113°.

8 0

3 years ago

Please please helpppp!

padilas [110]

Answer:

Step-by-step explanation:

So all of them have a theretical probability of 1/5. Now to determine the experimental propability. (1=6/25, 2=2/25, 3=5/25 or 1/5, 4=4/25, 5=8/25)

Three has an experimental propability of 1/5, which is the same as its theretical propability.

6 0

3 years ago

What number solves the equation 7(x - 2) = 42?<br><br>Hellppppppp

Nostrana [21]

Answer:

x = 6

Step-by-step explanation:

8 - 2 = 6

7(8 - 2) = 7(6)

7x6 = 42, so

x = 6 is the correct answer

3 0

3 years ago

Simplify the expression when j = 5 and k = 3

JulijaS [17]

Answer:

1 7

Step-by-step explanation:

5 x 3 = 15

5 + 3 = 8

=1 7

7 0

2 years ago

Approximately 26% of people have Rh negative blood. We will check the blood tests of the next 12 people to enter an emergency cl

Pachacha [2.7K]

Answer:

Step-by-step explanation:

Let X be the number of persons out of 12 who have RH negative blood.

X is binomial since each person is independent of the other to have Rh negative blood.

n =12

a) What is the probability that exactly 5 of those patients will have Rh negative blood?

P(X=5) = $12C5 (0.26)^5 (1-0.26)^7\\= 0.1143$

b) What is the probability that at least 3 of them will have Rh negative blood?

$P(X\geq 3) = \Sigma_3^{12} 12Cr (0.26)^r (1-0.26)^{12-r}$ =0.6397

c) What are the expected number and standard deviation of the number of these patients with Rh negative blood?

E(X) = np = $12(0.26) = 3.12$

Var(x) = npq = $3.12 *0.74$

Std dev = $\sqrt{Varx} \\=1.5195$

4 0

4 years ago