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olga55 [171]
3 years ago
11

The sum of three numbers is 50 . The second number is 2 times the third. The third number is 10 more than the first. What are th

e numbers?
Mathematics
1 answer:
MAVERICK [17]3 years ago
8 0

The numbers are 5,30,15

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Any REAL help on #16 above??? Can someone check my answer?
babymother [125]

Answer:

The answer to your question is:th first option is correct.

Step-by-step explanation:

Here we have and hyperbola with center (0, 1), and the hyperbola is horizontal because x² is positive.

Equation

y - k = ±\frac{b}{a} (x - h)

Process

Find a, b

                a² = 9    

               a = 3

                b² = 5

              b = √5

              h = 0    and k = 1

Substitution

              y - 1 = ±\frac{√5}{3} (x - 0)

Equation 1

            y = \frac{\sqrt{5} }{3} x + 1

Equation 2

           y = - \frac{\sqrt{5} }{3} x + 1  

3 0
3 years ago
Help me with the questions in the image
aliya0001 [1]

Answer:

12

96

9

38

25

Step-by-step explanation:

<h3>i.a+7 for a=5</h3>

5+7=12

<h3>ii.8(c+3) for c =9</h3>

8(9+3)

8(12)

96

<h3>iii.n+8 divided by 4 for n=28</h3>

=28+8 divided by 4

=36 divided by 4

=9

<h3>iv.6p+40 divided by 5 for p =5</h3>

=6×5+40 divided by 5

=30+40 divided by 5

=70 divided by 5

=38

<h3>v.3x+7 for x=6</h3>

=3×6+7

=18+7

=25

5 0
3 years ago
What is the value of x?: -5x - 16 = 8x - 3
marysya [2.9K]

Answer:

x = -13/3 or -4 1/3 or - 4.333...333

Step-by-step explanation:

-5x - 16 = 8x - 3

-16 = 8x - 3 - 5x

-16 + 3 = 8x - 5x

-13 = 3x

x = -13/3 or -4 1/3 or - 4.333...333

... represents that it has infinite amount of 3's

5 0
3 years ago
Read 2 more answers
PLZ PLZ PLZ ANSWER THIS!!!!
snow_lady [41]

Answer:

a.

Step-by-step explanation:

girls 60/50

boys 40/50

40/50 is 10

5 0
3 years ago
A researcher wants to determine whether there is a relationship between age and the number of text messages sent in a given day.
Hatshy [7]

Answer:

ME= 2.58 \sqrt{\frac{0.8(1-0.8)}{125} +\frac{0.625 (1-0.625)}{120}}= 0.1465

The best option would be:

d. 0.1465

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

p_A represent the real population proportion for brand 18-25 users

\hat p_A =\frac{100}{125}=0.8 represent the estimated proportion for 18-25 users

n_A=125 is the sample size

p_B represent the real population proportion for 26-35 users

\hat p_B =\frac{75}{120}=0.625 represent the estimated proportion for 26-35 users

n_B=120 is the sample size required for Brand B

z represent the critical value for the margin of error  

The population proportion have the following distribution  

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})  

Solution to the problem

The confidence interval for the difference of two proportions would be given by this formula  

(\hat p_A -\hat p_B) \pm z_{\alpha/2} \sqrt{\frac{\hat p_A(1-\hat p_A)}{n_A} +\frac{\hat p_B (1-\hat p_B)}{n_B}}  

For the 99% confidence interval the value of \alpha=1-0.99=0.01 and \alpha/2=0.005, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=2.58  

And the margin of error is given by:

ME= z_{\alpha/2} \sqrt{\frac{\hat p_A(1-\hat p_A)}{n_A} +\frac{\hat p_B (1-\hat p_B)}{n_B}}

And if we replace we got:

ME= 2.58 \sqrt{\frac{0.8(1-0.8)}{125} +\frac{0.625 (1-0.625)}{120}}= 0.1465

The best option would be:

d. 0.1465

8 0
3 years ago
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