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3 years ago

Solve the system of equations

1 answer:

7 0

Using substitution:

13(y+6)-6y=22
13y+78-6y=22
7y+78=22
/// -78 -78
7y=-56
÷7 ÷7
y=-8

x=y+6
x=-8+6
x=-2

So, x equals -2 and y equals -8.

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Suppose that 20% of adults belong to health clubs, and 51% of these health club members go to the club at least twice a week. Wh

Westkost [7]

Answer:

10.2% of adults will belong to health clubs and will go to the club at least twice a week

Step-by-step explanation:

assuming that the event H=an adult belongs to a health club and the event T= he/she goes at least twice a week , then if both are independent of each other:

P(T∩H)= P(H)*P(T) ( probability of the union of independent events → multiplication rule )

replacing values

P(T∩H)= P(H)*P(T) = 0.20 * 0.51 =0.102

then 10.2% of adults will belong to health clubs and will go to the club at least twice a week

5 0

4 years ago

The number 1953125 is equal to 5^9. explain how the information above informs you that 1953125 is not a square number

ValentinkaMS [17]

If 1953125 is a square number, then $1953125=n^2,~n\in\mathbb{N}$

By what's given, $1953125=5^9\Rightarrow n^2=5^9\Rightarrow n=5^{4.5}=625\sqrt{5}$

But $n=625\sqrt{5} \notin\mathbb{N}$ , therefore, our assumption that 1953125 is a square number is wrong.

4 0

3 years ago

GIVING BRAINLIEST PLEASE HELP!!

algol [13]

ANSWER:

[a] Chord –» AE.

[b] Minor arc –» arcAB.

[c] Radius –» BC.

[d] Major arc –» arcBAE.

[e] Tangent line –» DE.

[f] Inscribed angle –» ∠BAE.

[g] Central angle –» ∠BCE.

[h] Secant line –» AB.

8 0

3 years ago

Read 2 more answers

Help Me Please!

ElenaW [278]

Answer:

−12 ÷ 4 expression best shows the temperature change each hour. Hence Option C is correct

Solution:

Given that, the temperature has been going down at a constant rate.

In 4 hours it went down by 12 degrees.

Now, we have to choose the correct option which best describes about the change in temperature for each hour.

Now, we know that, 12 degrees decreased in 4 hours.

Then, number of degrees decreased in one hour = $\frac{\text {total change in temperature.}}{\text {number of hours}}$

Number of degrees changed in one hour = $\frac{12}{4}$

Because the temperature is decreasing we have to add a (-) symbol before the change in degrees.

So, now, number of degrees changed in 1 hour = $\frac{-12}{4}$

Hence, the correct option is option c.

5 0

4 years ago

Pls tell me the right answer

Crank

Answer:

C is the right answer

Step-by-step explanation:

C is the right answer

Hope that helps

7 0

3 years ago

Read 2 more answers