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zubka84 [21]
3 years ago
5

Identify the properties needed to prove n + n + n + 2n = 5n.

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
6 0
The answer is 1+1+1+2n=5n
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3. Sum of digits of a two digit number is 14. When 18 is added to the original number, then the new number is obtained by exchan
Nitella [24]

Answer:

let the numbers be xy

general form of the number =10x+y

sum of digits of a number =14

x+y=14………[1]

if 18 is added to the number, then digits are interchanged

10x+y+18=10y +x

9x-9y=-18

X-y=-2………[2]

the linear equations are 1) x+y=14

2) X-y=-2

adding [1],[2]

2x=12

x=6

x+y=14

y=14-x

y=14-6

y=8

there fore the number =10*6+8

=68

check:-

1)6+8=14

2)68+18=86

I hope this helped!

Step-by-step explanation:

6 0
4 years ago
Is (- 5, 0) on the circle with the equation (x - 3) ^ 2 + (y + 4) ^ 2 = 74
Kryger [21]
(-5,0) is inside the circle

4 0
3 years ago
There is a 0.9986 probability that a randomly selected 33​-year-old male lives through the year. A life insurance company charge
Helen [10]

Answer:

Expected Value = -$42 (loss of 42 dollars)

Step-by-step explanation:

Complete Question Below:

<em>"There is a 0.9986 probability that a randomly selected 33​-year-old male lives through the year. A life insurance company charges ​$182 for insuring that the male will live through the year. If the male does not survive the​ year, the policy pays out ​$110 comma 000 as a death benefit. If a 33-year-old male purchases the policy, what is his expected value?"</em>

<em />

We can say P(survival) = 0.9986 and thus P(not survival) = 1 - P(survival) = 1-0.9986 = 0.0014

Also,

In case 33 year old doesn't live, the payment would be 100,000 - 182 = $99,818

And

In case 33 year old lives, the payment is

-$182

We know, the <em>expected value is the sum of the product of each possibility with its probability.</em>

ExpectedValue=\Sigma x*p(x)=(99818)(0.0014)+(-182)(0.9986)=-42

This means a loss of $42 (or -$42)

4 0
3 years ago
Estimate the difference. Use benchmarks with decimal parts of 0, 0.25, 0.50, or 0.75.
S_A_V [24]

Answer:

the estimated answer is B: 2.50.

<em>(</em><em>the</em><em> </em><em>exact</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>2</em><em>.</em><em>4</em><em>8</em><em>,</em><em> </em><em>but</em><em> </em><em>rounding</em><em> </em><em>up</em><em> </em><em>would</em><em> </em><em>make</em><em> </em><em>it</em><em> </em><em>2</em><em>.</em><em>5</em><em>0</em><em>)</em>

5 0
3 years ago
Does the following set of measurements create a triangle? 17,35, and 18<br><br> True or False
Natasha_Volkova [10]
False, because a^2+b^2=c^2 and no matter what numbers substitute for which ever variable the answer isn’t going to be true
4 0
4 years ago
Read 2 more answers
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