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Xelga [282]
3 years ago
12

Amber mother gives her $15and she saves $3 a week. The expression 15+3w gives the amount she saves after w weeks. How much money

will Amber have saved after 2 weeks,5 weeks, and 10 weeks
Mathematics
2 answers:
Feliz [49]3 years ago
7 0

Answer:Amber have saved money after 2 weeks = $6,

After 5 weeks=$30

After 10 weeks =$45

Step-by-step explanation:

Given: Amber mother gives her $15and she saves $3 a week.

The expression 15+3w gives the amount she saves after w weeks.

At w=2,

Saved money =15+3(2)=15+6=\$6

At w=5,

Saved money =15+3(5)=15+15=\$30

At w=10,

Saved money =15+3(10)=15+30=\$45

Hence,  Amber have saved money after 2 weeks = $6,

After 5 weeks=$30

After 10 weeks =$45

Mariulka [41]3 years ago
4 0
After 2 weeks:
15+3(2)=15+6= $21
After 5 weeks:
15+3(5)=15+15= $30
After 10 weeks:
15+3(10)=15+30= $45

Hope this helps
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in a given year, the rate of flu infection for the general public was 8.3%. And sample of 200 people who receive the flu vaccine
makkiz [27]

Answer:

\fbox{\begin{minipage}{10em}Option A is correct\end{minipage}}

Step-by-step explanation:

<em>Step 1: Define significance level</em>

In this hypothesis testing problem, significance levels α is selected: 0.05, the associated z-value from Laplace table:

Φ(z) = α - 0.5 = 0.05 - 0.5 = -0.45

=> z = -1.645

<em>Step 2: Define null hypothesis (</em>H_{0}<em>) and alternative hypothesis (</em>H_{1}<em>)</em>

H_{0} : rate of flu infection p = 8.3% or 8.3/100 = 0.083

H_{1} : rate of flu infection p < 8.3% or 8.3/100 = 0.083

<em>Step 3: Apply the formula to check test statistic:</em>

K = \frac{f - p}{\sqrt{p(1 - p)} } * \sqrt{n}

with f is actual sampling percent, p is rate of flu infection of H_{0}, n is number of samples.

The null hypothesis will be rejected if K < z

<em>Step 4: Calculate the value of K and compare with </em>z

K = \frac{(\frac{3.5}{100})  - 0.083}{\sqrt{0.083(1 - 0.083)} } * \sqrt{200} = -2.46  

We have -2.46 < -1.645

=>This is good evidence to reject null hypothesis.

=> The actual rate is lower. (As H_{1} states)

Hope this helps!

:)

5 0
3 years ago
What is the area of the figure?
zalisa [80]

Answer: 57 ft²

Step-by-step explanation:

Find the areas of the two individual rectangles and then add that up to find the area of the figure:

Rectangle A:                                                             Rectangle B:

= Length * Width                                                       = 11.5 * 3

= 7.5 * 3                                                                     = 34.5ft²

= 22.5 ft²

Area of figure:

= 22.5 + 34.5

= 57 ft²

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Mr. Hinckley owns 83 acres of land, he divides the land into eight equal sections to sell to eight buyers which phrase describes
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Alright, lets get started.

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It means, we could find the land each buyer receives by dividing total land by 8.

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So, each buyer receives land = 10.375 acres

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