Y = 4x<br> y=19 - x<br> Solve the system of equations

A carpenter can do a job in two hours. His assistant can do the same job in three hours. How long would it take them to do the j

OlgaM077 [116]

The carpenter makes 1/4 of the job per hour.

The assistant makes 1/6 of the job per hour.

When they work together, they make 1/4 + 1/6 = 6/24 + 4/24 = 10/24 = 5/12 of the job each hour.

Thus, it will take 12/5 = 2 2/5 hours = 2 hours and 24 minuets for them to finish the job working together.

5 0

3 years ago

Read 2 more answers

Carpetin costs 9.99$ a yard .If jan buys 17.4 yard how much will it costs<br>? to nearst hundreadth

vlada-n [284]

It would cost $173.83

7 0

4 years ago

HELP! ASAP!

masha68 [24]

Step-by-step explanation:

2.

the volume of the box is

length × width × height = 13×13×13 = 13³ = 2197 cm³

the ratio of the density indignation tells us that every cm³ of soil weighs 1.33 g (or every unit of 1.33g soil fits into 1 cm³).

we have 2197 cm³.

their weight is

2197 × 1.33 = 2,922.01 g

so, the filled box clearly exceeds the max. weight of the window ledge, and it is NOT safe to put it there.

b

yes, it would be a little bit less dense.

because every bit of weight you put on top of something increases the pressure on and therefore the density of that something.

6 0

2 years ago

A spinner has three sections. This table shows the results of spinning the arrow on the spinner 80 times.

UNO [17]

The experimental probability of the arrow stopping on Section 2 will be $\rm \frac{3}{8}$ . is the ratio of the favorable event to the total number of events.

<h3>What is probability?</h3>

Probability means possibility. It deals with the occurrence of a random event. The value of probability can only be from 0 to 1.

No of arrows given in the different section ;

Section 1=18

Section 2=30

Section 3=32

The probability that the arrow stopping on Section 2 is found as;

$\rm P = \frac{Favourable \ outcomes }{Total \ outcomes } \\\\\ P= \frac{30}{18+30+32} \\\\ P=\frac{30}{80}\\\\ P= \frac{3}{8}$

Hence, the experimental probability of the arrow stopping on Section 2 will be $\rm \frac{3}{8}$ .

More about the probability link is given below.

brainly.com/question/795909

#SPJ1

7 0

2 years ago

A researcher reports a 98% confidence interval for the proportion of Drosophila in a population with mutation Adh-F to be [0.34,

Fantom [35]

Answer:

$0.34 \leq p \leq 0.38$

For this case we can conclude that with 98% of confidence the true proportion of Drosophila in a population would be between 0.34 and 0.38.

But that doesn't means that we have 98% of PROBABILITY that the true proportion would be between 0.34 and 0.38, because we are constructing a confidence interval with sample data and we can't analyze this using probability.

Then the best answer is:

2. False