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
Nezavi [6.7K]
3 years ago
10

I need help with this! ​

Mathematics
1 answer:
Yanka [14]3 years ago
7 0

Part A

Answer:  33.2 degrees F

Explanation: Adding on a negative is the same as subtracting. So 72.3 + (-39.1) = 72.3 - 39.1 = 33.2

================================================

Part B

Answer: 70 + <u>  2   </u> + <u>  0.3  </u>  + (-30) + (-9) + (  <u> </u><u>-0.1  </u> )

Explanation:

Think of 72 as 70+2. Furthermore, think of 72.3 as 70+2+0.3; we just break the number up into its corresponding digits (adding zeros when needed). The 7 is in the tens place, the 2 is in the units or ones place, and the 3 is in the tenths place.

Similarly, we have 39.1 break down into 30+9+0.1, in which all three terms are made negative to represent -39.1

================================================

Part C

Answer:   70 + (-30) + <u> 2 </u> + (-9) + <u>0.3</u> + ( <u>-0.1</u>  )  

Explanation: Arrange the tens place value items to be next to each other. Same goes for the units place value, and also the tenths place value.

================================================

Part D

Answer:  [70 + (-30)] +  [ <u> 2 </u> + (-9) ] + [ <u>0.3</u> + ( <u>-0.1</u>  ) ]

Explanation: Take the result of part C and surround each pair of terms in square brackets to show how the terms pair up.

You might be interested in
The product of g and 4
ikadub [295]

Answer:

4 grams............

Step-by-step explanation:

4 0
3 years ago
What is the longest line segment that can be drawn in a right rectangular prism that is 15 cm​ long, 11 cm​ wide, and 10 cm​ tal
sammy [17]

Answer:

  √446 ≈ 21.12 cm

Step-by-step explanation:

The longest dimension of a rectangular prism is the length of the space diagonal from one corner to the opposite corner through the center of the prism. The Pythagorean theorm tells you the square of its length is the sum of the squares of the dimensions of the prism:

  d² = (15 cm)² +(11 cm)² +(10 cm)² = (225 +121 +100) cm² = 446 cm²

  d = √446 cm ≈ 21.12 cm

The longest line segment that can be drawn in a right rectangular prism is about 21.12 cm.

_____

<em>Additional comment</em>

The square of the face diagonal is the sum of the squares of the dimensions of that face. The square of the space diagonal will be the sum of that square and the square of the remaining prism dimenaion, hence the sum of squares of all three prism dimensions.

8 0
2 years ago
Mathematicians 4: Who is Who?
larisa86 [58]

Answer:

a. x = -9 or x = -2

b. -5(x - 4)

c. x = -3 or x = 5

d. x = ±7

Step-by-step explanation:

a. First person;

y = x² + 11x + 18

y = x² + 9x + 2x + 18

y = x(x + 9) + 2(x + 9)

y = (x + 9)(x + 2)

y = x = -9 or x = -2

b. Second person;

y = -5x + 20

The common factor is 5.

y = -5(x - 4)

c. Third person;

y = x² - 2x - 15

y = x² - 5x + 3x - 15

y = x(x - 5) + 3(x - 5)

y = (x + 3)(x - 5)

y = x = -3 or x = 5

d. Fourth person;

y = x² - 49

Applying the difference of squares formula;

(a² - b²) = (a - b)(a + b)

y = x² - 49 = x² - 7² = (x - 7)(x + 7)

y = (x - 7)(x + 7)

y = x = ±7

6 0
2 years ago
The cost of safely disposing/A of the toxic chemicals is approximately/B
melomori [17]

The cost of safely disposing of the toxic chemicals is approximately five times what the company paid to purchase it.(Option D)

<h3>What is sentence correction?</h3>

Sentence correction or sentence improvement is a type of grammatical practice where a sentence is given with a word or a phrase that requires grammatical changes or improvement.

Now,

  • Here, we are talking about "toxic chemicals", that is "plural" but in the Part D of the sentence, "it" refers to the singular chemical.

Hence, the correction needs to be made at Option D; the correction would be: "paid to purchase them."

To learn more about sentence correction, refer to the link: brainly.com/question/14632568

#SPJ4

3 0
1 year ago
Marina is currently 14 years older than her cousin joey. in 5 years she will be 3 times as old as joey. if you let x represent j
serious [3.7K]
The expression is 14x
4 0
3 years ago
Other questions:
  • Ln (x-2) +ln (2x-3)=2ln x
    5·1 answer
  • Shelly is making an apple pie. She needs 1/2 of a cup of sugar for her pie . How many cups of sugar will she need if she need if
    7·2 answers
  • 3. A cookie recipe calls for a cup of flour. Davonna docsn't want loftover cookies, so she
    15·1 answer
  • 25 decreased four times n
    11·2 answers
  • Last Month, Levi had written 125 words of his book. This month,he is up to 12,580 words. About how many times more words has he
    8·1 answer
  • A caterer needs to buy 21 pounds of pasta to cater a wedding. At a local store, 8 pounds of pasta cost $12. How much will the ca
    8·1 answer
  • An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highw
    8·2 answers
  • What does −2 2/3 ÷ (−1/2) equal?
    11·1 answer
  • Write an explicit rule to represent the sequence: 20, 24, 28, 32, 36....
    7·2 answers
  • Write an absolute value equation to satisfy the given solution set shown on a number line
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!