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nekit [7.7K]
3 years ago
14

Mia has $40 in a savings account. She will start adding $5 to her account each week. Juan has $15 in a savings account. He will

start adding $10 to his account each week. Write a system of two linear equations to represent the situation.
Graph the system of equations you wrote in Part A.
Mathematics
1 answer:
____ [38]3 years ago
4 0

Answer:1

Step-by-step explanation:

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What is 5 x 5 x 5 x 5 in exponential notation?
kramer

Answer:

5^4

Step-by-step explanation:

because 5 is multiplied 4 times

3 0
2 years ago
Jacob is a plumber. Due to increased material costs, he puts all his prices up by 7%. He now chargers R320 per hour for her serv
Lorico [155]

Answer:

R290.1

Step-by-step explanation:

Let

x = charge before he put his prices up

New charge = R320

Percentage increase in price = 7%

x + 7% of x = 320

x + 0.07 * x = 320

x + 0.07x = 320

1.07x = 320

x = 320/1.07

x = 299.06542056074

Approximately

x = R290.1

Charge before he put his prices up = R290.1

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2 years ago
The diagram shows a sector of a circle of radius 4 cm.<br> work out the length of the arc abc
Zielflug [23.3K]
Need to know the angle for this I think?
3 0
3 years ago
Simplify 7x + 7 + 6x - 9.
ratelena [41]
The answer is 13x-2.
3 0
3 years ago
Read 2 more answers
About 9% of the population has a particular genetic mutation. 900 people are randomly selected. Find the standard deviation for
timama [110]

Answer:

The standard deviation is of 8.586.

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they have a genetic mutation, or they do not. The probability of a person having the mutation is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

About 9% of the population has a particular genetic mutation.

This means that p = 0.09

900 people are randomly selected.

This means that n = 900

Find the standard deviation for the number of people with the genetic mutation in such groups of 900.

\sqrt{V(X)} = \sqrt{900*0.09*0.91} = 8.586

The standard deviation is of 8.586.

3 0
3 years ago
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