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Mariulka [41]
3 years ago
13

Raeana is twice as old as Madeline, and Laura is 10 years older than Raena. If Laura is 50 years old, how old is Madeline? Defin

e your variables.
Mathematics
1 answer:
laiz [17]3 years ago
7 0

Answer: Madeline is 20 yrs old

Step-by-step explanation:

If Laura is 50 and she is 10 years older than Raena then Raena is 40 that would then make Madeline 20 years old.

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What two number multiply to -21 and add to 20
aliya0001 [1]
21 * (-1) = -21
21 + (-1) = 20
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3 years ago
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Solve <br> 2x + 4 ( 2x + 7 ) + 3 (2x + 4)
horsena [70]
2x+4(2x+7)+3(2x+4)
2x+8x+28+6x+12
16x+40

16x+40 would be the answer you can’t solve it any further
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3 years ago
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In a certain​ country, the true probability of a baby being a girl is 0.469. Among the next seven randomly selected births in th
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Answer:

The probability is 0.995 ( approx ).

Step-by-step explanation:

Let X represents the event of baby girl,

The probability of a baby being a girl is, p = 0.469,

So, the probability of a baby who is not a girl is, q = 1 - 0.469 = 0.531,

Also, the total number of experiment, n = 7

Thus, by the binomial distribution formula,

P(x)=^nC_x(p)^x q^{n-x}

Where, ^nC_x=\frac{n!}{x!(n-x)!}

The probability that all babies are girl or there is no baby boy,

P(X=7)=^7C_7(0.469)^7(0.531)^{7-7}

=0.00499125661758

Hence, the probability that at least one of them is a boy​ = 1 - P(X=7)

= 1 - 0.00499125661758

= 0.995008743382

≈ 0.995

8 0
3 years ago
First, I add 1. Then, I multiply by 2. Next, I divide by 3. As a result, I get 4. What is my starting number?
Ira Lisetskai [31]

Answer:5

Step-by-step explanation:

reverse the steps

2(x+1)/3=4

2(x+1)/3×3=4×3

2(x+1)/2=12/2

x+1=6

x=6-1

x=5

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3 years ago
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Jake monthly expenses include a $60 cable bill, a $200 car payment and $120 for car insurance. If he brings home $525 per month,
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Answer:

he would have 145 dallors after baying his bills


Step-by-step explanation:


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3 years ago
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