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3 years ago

Answer and explanation please.

Mathematics

1 answer:

vfiekz [6]3 years ago

3 0

The x would equal 6 because if you substitue 6 for x and 2 for y, when you add them, it will be 8. Divide that by 2 and it will result in 4. And if you subtract 2 from 6, your answer will still be 4.

x+y/2
Substitute 6 for x and 2 for y
6+2/2
Add 6 and 2
8/2
Divide
Final Answer: 4

6-2
Subtract
Final Answer: 4

Since both of the answers result in 4, that is what makes x=6 and y=2 true.

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Assume that when adults with smartphones are randomly selected, 61% use them in meetings or classes. If 8 adult smartphone user

podryga [215]

Answer:

0.1147

Step-by-step explanation:

When adults with smartphones are randomly selected, 61% use them in meetings or classes, then

the probability of using the smartphone is $p=0.61;$

the probability of not using the smartphone is $q=1-p=1-0.61=0.39.$

If 8 adult smartphone users are randomly selected, the probability that exactly 3 of them use their smartphones in meetings or classes can be calculated using binomial distribution as

$C^8_3\cdot p^3\cdot q^{8-3}=C^8_3\cdot (0.61)^3\cdot (0.39)^5$

Note that

$C^8_3=\dfrac{8!}{3!(8-3)!}=\dfrac{5!\cdot 6\cdot 7\cdot 8}{2\cdot 3\cdot 5!}=\dfrac{6\cdot 7\cdot 8}{2\cdot 3}=7\cdot 8=56,$

then the probabilty is

$56\cdot (0.61)^3\cdot (0.39)^5\approx 0.1147$

8 0

3 years ago

a school librarian surveyed students about their favorite type of novel. The results are shown in the table at the right. What p

Brrunno [24]

18+10+26+4=58
26.58= 0.44827
About 44.83%

6 0

3 years ago

Read 2 more answers

1 7/8 x 10/7 x 4 I need help answering this its confusing<br>

Alla [95]

Answer: 75/7

Step-by-step explanation:

<u>Concept:</u>

Multiplication in fraction is the numerator times numerator and denominator times denominator, and if possible, you can simplify the numerator and denominator by eliminating common factor.

<u>Solve:</u>

1 7/8= 15/8

1 7/8 × 10/7 × 4

=15/8 × 10/7 × 4

=150/56 × 4

=600/56

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4 years ago

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Find the distance round the semi circle with a diameter of<br>35 cm<br>

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Answer: a semi circle is half a circle so 35 divided by 2 is 17.5

Step-by-step explanation:

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3 years ago

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2) given ABC≈DEF, answer questions A and B

Illusion [34]

Answer:

If ABC and DEF are similar triangles such that ∠A = 47° and ∠E = 63°, then the measures of ∠C = 70°. Is it true? Give reason. ∴ Given statement is true. Question 3. Let ∆ABC ~ ∆DEF and their areas be respectively 64 cm 2 and 121 cm 2. If EF = 15.4 cm, find BC. Question 4. ABC is an isosceles triangle right-angled at C. Prove that AB 2 = 2AC 2.

Step-by-step explanation:

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3 years ago