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Alja [10]
2 years ago
7

Please help on this,

Mathematics
1 answer:
Elina [12.6K]2 years ago
4 0
If there are 50 teens in the program and 34% of them have two siblings, then we need to multiply 50 by 0.34 to find 34 percent of 50. 50*0.34 = 17. Therefore, there are 17 teens who have two siblings.
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I will mark the brainiest! Please, and thanks! :)
Contact [7]
The best thing is to have a ruler with the appropriate units to construct these triangles;)

8 0
2 years ago
What are the solutions to the equation 3x2 + 15x = 18?
jok3333 [9.3K]

3x {}^{2}  + 15x = 18

<h2>Divide the entire thing by 3</h2>

x {}^{2}  + 5x = 6

x {}^{2}  + 5x - 6 = 0

<h2>You can find the roots by using the quadratic formula or by using the form x²-Sx+P</h2>

let \:  \alpha \:  and \: \beta  \: be \: the \: roots

<h2>Two numbers whose sum is -5 and product is -6</h2><h2>-6 and +1</h2>

<h2>Your answer is B</h2>

6 0
2 years ago
If 8x = 48, then x = ___. (Only input whole number) Numerical Answers Expected! Answer for Blank 1:
Leno4ka [110]

Answer:

x = 6

Step-by-step explanation:

8x = 48,

Divide each side by 8 to isolate x

8x/8 = 48/8

x = 6

5 0
3 years ago
Compute the amount of interest earned in the following simple interest problem. A deposit of $7,000 at 8.5% for 120 days.
tankabanditka [31]
Hi there
The formula is
I=prt
I interest earned?
P principle 7000
R interest rate 0.085
T time 120/360

I=7,000×0.085×(120÷360)
I=198.33

Hope it helps
4 0
3 years ago
In a previous​ year, 51​% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different tod
Yanka [14]

Answer:

Given:

n = 550

Po = 51% = 0.51

P0 - 1 = 0.51 - 1 = 0.49

p' = \frac{287}{550} = 0.5218

np0(1 - p0) = 550*0.51(1-0.51)

= 137.4 ≥ 100

This means the sample size is greater than 5% of the population size. and the sample can be reasonably assumed to be random, the requirement for testing hypothesis are satisfied.

1) The null and alternative hypotheses:

H0 : p0 = 0.51

H1 : p0 ≠ 0.51

The test statistic Z,

Z = \frac{p' - p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Z = \frac{0.5218 - 0.51}{\sqrt{\frac{0.51(1-0.51)}{550}}}

Z = 0.55

This is two tailed test.

The pvalue for Z =0.55

Pvalue = 0.5824

3) Decision:

Since pvalue, 0.5824 is greater than significance level, we fail to reject null hypothesis H0.

Conclusion:

Do not reject Upper H0. There is not sufficient evidence at the alpha equals 0.01 level of significance to conclude that the proportion of females who are living alone has changed.

8 0
3 years ago
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