There are 5280 feet in 1 mile. How many inches are in 2 miles ?

All of last year’s car models were marked down 40%. Tracy wants to buy a car on sale for $18,000. What was the retail price of t

Zinaida [17]

25,200 is the retail price of the car. 18000 + (40% = 7200) equals to 25,200.

6 0

3 years ago

Read 2 more answers

Find (2x^2-4)-(5x^2+2)+(7x^2-5)

fomenos

( 2x² - 4) - ( 5x² + 2 ) + ( 7x² - 5) = ( 2x² - 4 - 5x² - 2 + 7x² - 5)

= (2x² - 5x² + 7x² - 4 - 2 - 5)

= 4x² - 11

7 0

3 years ago

Drag the tiles to the correct boxes to complete the pairs. Match each system of inequalities to the graph representing its solut

mojhsa [17]

The solutions to the systems of inequalities are (0.3, 1.3), (-1, -2), (0.4, 1.8) and (3.6, 0.8)

<h3>How to determine the solution to the systems?</h3>

The graph of the systems of inequalities is not given.

So, I would plot a new graph to answer this question.

The systems of inequalities are given as:

y − x > 1 and 2x + y ≤ 2

x + y ≥ -3 and 5x – y ≤ -3

2x – y ≤ -1 and x + 2y < 4

4x – 3y < 12 and x + 3y ≥ 6

Next, we plot these inequalities on a graph and write out the points of intersection.

From the attached graph, we have:

y − x > 1 and 2x + y ≤ 2 ⇒ (0.3, 1.3)

x + y ≥ -3 and 5x – y ≤ -3 ⇒ (-1, -2)

2x – y ≤ -1 and x + 2y < 4 ⇒ (0.4, 1.8)

4x – 3y < 12 and x + 3y ≥ 6 ⇒ (3.6, 0.8)

Hence, the solutions to the systems of inequalities are (0.3, 1.3), (-1, -2), (0.4, 1.8) and (3.6, 0.8)

Read more about systems of equations at:

brainly.com/question/21405634

#SPJ1

8 0

2 years ago

En una tienda de ropa vas a comprarte una pantalones que están de 150 a 90 euros y una camiseta de 40 a 24 ¿ tienen el mismo por

uranmaximum [27]

Respuesta:

Sí, tienen el mismo descuento del 40%

Explicación paso a paso:

Dado :

PANTALÓN :

Precio inicial = 150

Precio con descuento = 90

Porcentaje de descuento en el precio:

(150 - 90) / 150 * 100%

60/150 * 100%

0,4 * 100

= 40%

CAMISA:

Precio inicial = 40

Precio con descuento = 24

Porcentaje de descuento en el precio:

(40-24) / 150 * 100%

16/40 * 100%

0,4 * 100

= 40%

Sí, tienen el mismo descuento del 40%

8 0

3 years ago

Amara was working on a report on Greek and Egyptian mathematicians. She decided to find a 98 percent confidence interval for the

Fiesta28 [93]

Answer:

E. The entire population is measured in both cases, so the actual difference in means can be computed and a confidence interval should not be used.

Step-by-step explanation:

The entire population of Greek and Egyptian mathematicians was already measured by Amara. She can measure the actual difference in the mean. Therefore, she needn't use a confidence interval. It is mostly common for a researcher to be more interested in the difference between means than in the specific values of the means. The difference in sample means is used to compute the difference in population means.

Amara's sample is a random selection of Greek and Egyptian mathematicians. It is a smaller group drawn from the population that has the characteristics of the entire population. The observations and conclusions made against the sample data are attributed to the population. In this case, the entire position is measured.

A t-test is a type of inferential statistic used to determine if there is a significant difference between the means of two groups (Greek and Egyptian mathematicians) which may be related in certain features. It is mostly used when the data sets, like the data set recorded as the outcome from rolling a die 50 times, would follow a normal distribution and may have unknown variances. A t-test is used as a hypothesis testing tool, which allows testing of an assumption applicable to a population. Once the actual difference is known, a confidence interval should not be used.

7 0

4 years ago