1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondaur [170]
3 years ago
8

A man invests a certain amount of money at 2% interest and $800 more than that amount in another account at 4% interest. At the

end of one year, he earned $112 in interest. How much money was invested in each account?
Which of the following equations could be used to solve the problem?

0.02x + 0.04(800) = 112
0.02x + 0.04(x + 800) = 112
0.04x + 0.02(x + 800) = 112
Mathematics
2 answers:
Sonja [21]3 years ago
5 0
In my opinion it could be the last one
sergiy2304 [10]3 years ago
3 0

Answer:

It should be the last one

Step-by-step explanation:

If it's wrong sorry but I'm pretty sure it that one

You might be interested in
A sequence of Bernoulli trials consists of choosing components at random from a batch of components. A selected component is eit
Drupady [299]

Answer:

a) 0.0287 = 2.87% probability that three non-defective components in a batch of seven components.

b) 0.0336 = 3.36% probability that 8 non-defective components are drawn before the first defective component is chosen.

Step-by-step explanation:

A sequence of Bernoulli trials composes the binomial distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

The probability that a selected component is non-defective is 0.8

This means that p = 0.8

a) Three non-defective components in a batch of seven components.

This is P(X = 3) when n = 7. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{7,3}.(0.8)^{3}.(0.2)^{4} = 0.0287

0.0287 = 2.87% probability that three non-defective components in a batch of seven components.

b) 8 non-defective components are drawn before the first defective component is chosen.

Now the order is important, so the we just multiply the probabilities.

8 non-defective, each with probability 0.8, and then a defective, with probability 0.2. So

p = (0.8)^8*0.2 = 0.0336

0.0336 = 3.36% probability that 8 non-defective components are drawn before the first defective component is chosen.

4 0
3 years ago
2 ( -2w - 1.2 + 7x) =
PSYCHO15rus [73]

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em><em>:</em><em>)</em>

8 0
3 years ago
What is the rate of change?
eduard

Answer:

12

Step-by-step explanation:

12 +30= 42

42+12=54

4 0
3 years ago
A high school student working part-time as a cashier had a gross income of $8125 last year. If her federal tax rate was 10% and
jek_recluse [69]
The answer is $1787.50
3 0
3 years ago
Well's College in New York was previously an all girls school. In 2005, the college began to allow boys to enroll. By 2012, the
kogti [31]

Answer: 150 boys

Step-by-step explanation:

Let the number of boys be x

Since there were 200 more girls than boys, the number of girls will be: = x + 200

Since the ratio of boys to girls was 3:7, this can be solved further below:

3/7 = x/x+200

Cross multiply

(7 × x) = 3(x + 200)

7x = 3x + 600

7x - 3x = 600

4x = 600

x = 600/4

x = 150

The number of boys enrolled is 150

Number of Girls will be:

= X + 200

= 150 + 200

= 350

Check: Number of boys / Number of girls

= 150/350

= 3/7

= 3:7

7 0
2 years ago
Other questions:
  • Someone plz help me out
    11·1 answer
  • A deposit of $200 is made in an account at the beginning of each month at an annual interest rate of 3% compounded monthly. The
    6·1 answer
  • Mariah spent $9.50 on 9 pounds of limes and pears. Limes cost $0.50 per pound and pears cost $1.50 per pound. Let l be the numbe
    11·1 answer
  • I say it is B but want to be sure
    15·1 answer
  • -0.2x^2+0.9x+0.6=y<br>What's the vertex form for this equation?​
    7·1 answer
  • Which of these statements describes a rebate?
    8·2 answers
  • True or False:<br> Zero is a neutral integer. It can be either positive or negative.
    9·2 answers
  • Kevin worked 62 hours last week if Kevin makes $18 per hour for regular pay what was his gross pay for the week including overti
    13·1 answer
  • Couch: $600 with a 31.5% markup
    9·1 answer
  • PLEASE HELP FAST Rewrite
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!