Work out: 27^-(1/3).

Answers

Answer 1

Answer: Click on the pic for answer:

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If 3x – 10 = 17, what is the value of 6x + 20 ?

Answers

$3x-10=17\ \ \ \ /+10\n\n3x-10+10=17+10\n\n3x=27\ \ \ \ /:3\n\n3x:3=27:3\n\nx=9\n\n\n\n6x+20=6\cdot9+20=54+20=74$

$3x-10=17\ \ \ /\cdot2\n\n2\cdot3x-2\cdot10=2\cdot17\n\n6x-20=34\ \ \ \ /+40\n\n6x-20+40=34+40\n\n6x+20=74$

74 because 3x equal 17+10. so x equals 9 and plug it in to the equation got 74

Kelly enlarged the area of a photograph to 250% of its original size. The original dimensions of the photograph were 5 inches by 7 inches. What is the area of the enlarged photograph, in square inches? A) 71.25 B) 87.5 C) 218.75 D) 3,000

Answers

The area of the enlarged photograph is 87.5 square inches.

What is the area of the enlarged photograph?

The first step is to determine the area of the photograph before it was enlarged. A photograph has the shape of a rectangle. So, the formula for the area of a rectangle would be used.

Area = length x width = 7 x 5 = 35

Area of the enlarged photograph = 2.5 x 35 = 87.5

To learn more about how to calculate the area of a rectangle, please check: brainly.com/question/16595449

Answer:

answer is B) 87.5 squared inches.

Step-by-step explanation:

The original dimensions of the photograph were 5 inches by 7 inches so, the area of the original photograph can be computed as the area of a rectangle:

$Area=(heigh)(base)$ .

$Area=(5)(7)$

$Area=35$ squared inches.

Now, for computing the area of a photograph of 250% the size of the original we use a simple rule of three:

35 squared inches -------- 100%

X squared inches --------- 250%

By this, we have:

$X = ((35)(250))/(100)$

$X = 2.5*35$

$X = 87.5$

Without using a calculator, determine whether 1728 is a perfect square, perfect cube, or neither.

Answers

It's a perfect cube.

What is 1.8r+9=-5.7r-6

Answers

You could do:
1 subtract 9 on both sides of the equation, 1.8r=-5.7r-15
2 then add 5.7r on both sides as well, 7.5r=15
3 divide 7.5 on each side, r=2.

Add 6 to booth sides.

1.8r+15=5.7r
Subtract 1.8 from both sides
15=3.9r
Divide 15 by 3.9
3.8=r

Pls complete it (picture)

Answers

Answer:

1. Perimeter: 26 Area: 30

2. Perimeter: 20 Area: 25

3. Perimeter: 38 Area: 144

Step-by-step explanation:

Perimeter you add all the sides and area you multiply length times height.

Dawn and Pablo are members of a normally distributed population that is being sampled. If the chance of Dawn being included in the sample is 0.05%, what must the chance of Pablo being included in the sample be in order to be able to make inferences about the population based on the sample?A) 0%
B) greater than 0% and less than 0.05%
C) 0.05%
D) greater than 0.05%

Answers

Answer: option C) 0.05%

In a normal distribution there are no biases, the chances (probabilities) of any member to be selected are the same. So, the chance to choose Pablo are the same that the chance to choose Dawn.

Answer:

C. 0.05%

Step-by-step explanation:

NONE

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