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3 years ago

Anna is saving to buy some souvenirs on a family vacation. She has already saved $125, and she saves another $2 from her

Mathematics

2 answers:

lorasvet [3.4K]3 years ago

8 0

Answer: y=125+2x or y=2x+125

Step-by-step explanation:

First, create the equation that models the situation.

The amount Anne already saves is the intial value, ory-intercept, which in this case is 125. She adds 2 to her savings everyday/ so the rate of change, or slope, is 2.

y=125+2x or y=2x+125

plot the y intercept then plot a second point using the slope of 2 or 2/1 draw a line that connects the y intercept and the other point.

FinnZ [79.3K]3 years ago

6 0

We can assume that the y-intercept for this equation is 125, because that would be how much Anna already has saved before she begins saving money from her allowance. Then, we know that Anna adds $2 to her savings each day from the problem, so we know that the slope will be positive 2 then.

Equation:

y = 2x + 125

Graph:

Attached below

Hope this helps!! :)

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Readme [11.4K]

For this question you can say:
5/9( °F - 32) = -10 °C
so now you should solve the equation:
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i hope this is helpful
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6 0

3 years ago

Can someone tell me if this is right

Ivan

No you have to right

2:1

4:2

6:3

8:4

These are correct

3 0

3 years ago

If a player rolls two dice and gets a sum of 2 or 12, she wins $20. if the sum is 7, she wins $5. the cost to play the game is $

Nata [24]

The expectation would be that the player would not get much money. 3, 4, 5, 6, 8, 9, 10, and 11 does not get a lot due to the entrance fee of $3. 20 - 3 = 17. 5 - 3 = 2.

6 0

3 years ago

A nationwide census is conducted and it is found that the mean number of hours of television watched per year by Americans is 35

Ber [7]

Answer:

Probability that a group of 4 Americans watch more than 400 hours of television per year is 0.3264.

Step-by-step explanation:

We are given that a nationwide census is conducted and it is found that the mean number of hours of television watched per year by Americans is 350 with a standard deviation of 220.

A group of 4 Americans is selected.

Let $\bar X$ = sample mean number of hours of television watched per year

The z score probability distribution for sample mean is given by;

Z = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean = 350

$\sigma$ = standard deviation = 220

n = sample of Americans = 4

Now, the probability that a group of 4 Americans watch more than 400 hours of television per year is given by = P( $\bar X$ > 400 hours)

P( $\bar X$ > 400) = P( $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ > $\frac{400-350}{\frac{220}{\sqrt{4} } }$ ) = P(Z > 0.45) = 1 - P(Z $\leq$ 0.45)

= 1 - 0.6736 = 0.3264

The above probability is calculated by looking at the value of x = 0.45 in the z table which has an area of 0.6736.

Hence, the probability that a group of 4 Americans watch more than 400 hours of television per year is 0.3264.

6 0

3 years ago

(-2, 6) and (4, -6) slope

Jobisdone [24]

slope formula:

(y2-y1)/(x2-x1)

(-6-6)/(4-(-2))

-12/6=

-2

SLOPE: -2

5 0

3 years ago