How to undo the operation and explain why it works a. adding 28 b. dividing by 17

Answers

Answer 1

Answer: a) subtracting 28, adding and subtracting are opposites
b) multiply by 17. Multiplying and dividing are opposites

Answer 2

Answer: put the operation in order to explain you

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What is 3/14 converting fractions to decimals

Answers

0.214285714

Hope this helps! :)

P.S- can you help me with my problem? LOL it's just that no one will help me! It's on planets. Hopefully, you know those stuff. :(

There are 15 black mice in a cage. The ratio of all mice to black mice is 5:1. How many mice are in the cage?

Answers

From the ratio 5:1 we know that all mice is 5 times more than black.
Knowing that there are 15 black mice we can multily it by 5 to find the answer.
15*5=75- its the anser

For a Supplementary angle, what is THE VALUE OF X in this problem:
(4x + 40)degrees and 3x

Answers

if you add it all together it will be 180 so to work it out you would do this...
7x+40=180
7x=140
x=20

hope this helps :)

a supplementary angle means two angles that equal 180°

4x + 40 + 3x = 180

7x + 40 = 180
-40 -40
----------------
7x = 140 140 ÷ 7 = 20

The scale of a square map indicates that each inch on the map corresponds to 5 miles. Write an expression that describes the area of land shown on the map. If the map is 8 inches on one side, what is the area of land shown on the map.

Answers

If x is the number of inches then the area is A = (5x)^2
So if x is 8 the area is (5*8)^2 = 1600 square miles

Please help! Triangle ABC is translated by the rule (x + 1, y + 1) and then dilated by a scale factor of 2 centered at the origin. Which statement describes the properties of triangles ABC and A''B''C'' after the transformations?A) ∠C and ∠C'' are congruent after both the translation and the dilation.
B) ∠C and ∠C'' are congruent after the dilation, but not after the translation.
C) segment AC and segment A double prime C double prime are congruent after both the translation and the dilation.
D) segment AC and segment A double prime C double prime are congruent after the dilation, but not after the translation.

Answers

Answer:

Step-by-step explanation:

1) Translated figures are congruent ones, so $\bigtriangleup ABC\cong \bigtriangleup A'B'C'$ , one unit to the right and one up in comparison to $\bigtriangleup ABC\cong \bigtriangleup ABC$ .

2)Since $\bigtriangleup A''B''C''$ was dilated with a scale factor of two then It's a similar figure to $\bigtriangleup ABC$ . Similar figures have congruent angles and different sizes.

Hence, ∠C≅∠C"

One third of the opposite of a number is less than 12

Answers

The number would be greater then 36.

What is inequality?

An inequality is a relation which makes a non-equal comparison between two numbers or mathematical expressions.

here, we have,

Let x represent the unknown number. The opposite of this number would be represented by -x.

1/3 of this is found by multiplying by 1/3; this gives us

1/3×(-x)

Since it is less than 12, this gives us

1/3×(-x) < 12

To cancel the 1/3, we can multiply both sides by 3:

1/3×(-x)×(3) < 12×(3)

-x < 36

We can cancel the negative by dividing both sides by -1. When we multiply or divide an inequality by a negative number we flip the inequality:

-x/-1 < 36/-1

x > 36

Our number must be greater than 36.

To learn more on inequality click:

brainly.com/question/24853349

#SPJ2

Answer:

The number would be greater then 36.

Step-by-step explanation:

Let x represent the unknown number. The opposite of this number would be represented by -x.

1/3 of this is found by multiplying by 1/3; this gives us

1/3(-x)