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Maksim231197 [3]
2 years ago
10

6. Roberta started the year with $125 in a savings account. She has been adding money at a rate of $15 per week. Write an equati

on in the form y = mx + b that represents the total amount of money (y) in the account after x weeks.​
Mathematics
1 answer:
nexus9112 [7]2 years ago
3 0

Answer:

y=15x+125

Step-by-step explanation:

Hope this helps!

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3 years ago
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A chocolate chip cookie recipe ask for one and one half times as much flour as chocolate chips. If three and three quarters cups
babymother [125]

Answer:

1/2 a cup.

Step-by-step explanation:

3.5 times as much flour as chocolate chips....

f = 3.5c

f = 1 3/4 (or 1.75)

1.75 = 3.5c

1.75 / 3.5 = c

0.5 = c......chocolate chips needed would be 1/2 a cup

Hope that helps!

6 0
2 years ago
What number would go in the blank? (3 • 5) • 2 = 3 • (__ • 2)<br><br> 10<br><br> 5<br><br> 2
tester [92]

Answer:

5

Step-by-step explanation:

It's the one that's missing.

Hope I helped!

Please mark Brainliest!

7 0
2 years ago
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For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 50
Volgvan

Answer:

P(\bar X>530)=1-0.808=0.192

Step-by-step explanation:

1) Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:

X \sim N(\mu=505,\sigma=170)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(505,\frac{170}{\sqrt{35}})

2) Calculate the probability

We want this probability:

P(\bar X>530)=1-P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X >530)=1-P(Z

P(\bar X>530)=1-0.808=0.192

3 0
3 years ago
Given parallelogram EFGH, find the values of x and y.
ki77a [65]

Answer:

y = 40, x = 9

Step-by-step explanation:

2(3y)+2(2y-20)=360

y = 40

2x=18

x = 9

8 0
1 year ago
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