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
Luba_88 [7]
2 years ago
5

Plz help me with 45/48 show work

Mathematics
2 answers:
Ymorist [56]2 years ago
8 0

Okay, so for number 45, we are simplifying this expression. We are going to use “PEMDAS”, which is the Order of Operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. We do have a variable and a constant in parentheses, but we don’t know the “x” value, so we can’t subtract them. However, we can do The distributive property, which would mean mulling that 2 outside of the parentheses with everything in the parentheses. So that would make our expression look like this:

2x-4+5x

What we do now is combine like terms, which means all of the xs will go together, and so will the constants (but we only have one, so we’re not going to do that). Now we’ll add 2x and 5x, which equals 7x. Now that -4 will stay the same.

<em>Final Answer: 7x-4</em>

For number 46, it’s a little different. We don’t have any parentheses, but we do have decimals. We’re just going to combine like terms again, meaning we’ll add the .4b and the 1.2b, making our new expression (and final answer!) look like this:

<em>Final Answer: 1.6b -3.2</em>

Finally, number 47 is making us use fractions...(how dare you number 47!) It’s okay though, we’ll solve it. Now, depending on your teacher, we can do different things with this expression. If your teacher doesn’t like mixed numbers, we’ll do an improper fraction. If your teacher doesn’t like either of those, we’ll do decimals. But for now, I think we can use fractions then later convert them into mixed fractions or decimals. We have to combine the gs, and 6=28/4. So that would be 1/4 g+ 28/4 g, which would be 29/4 g.

<em>Final Answer: 29/4 g -2/3</em>

<em> </em><em> Or</em>

<em>Final Answer: 7.5 g -2/3</em>

<em>Or</em>

<em>Final Answer: 7 1/4 g -2/3</em>

48. Basically, the temperature, (-12), dropped by 14 degrees. When it DROPS, that’s a key word tha we have to SUBTRACT. (The temperature got lower by 14 degrees) So, we have to do -12-14. Because we’re doing “-14” we’re getting more negative. So, our final answer is...

<em>-26 Degrees Celsius </em>

Anna71 [15]2 years ago
3 0

45.(2x-4)+ 5x; [2x+5x]-4; 7x-4

46. 0.4b-3.2+1.2b; [0.4b+1.2b] -3.2; 1.6b -3.2

47. 1/4g+6g- 2/3 6 1/4g -2/3

48. -12 -14= -26 the temperature was -26C at 11:00pm


You might be interested in
Write a numerical expression for the calculation.
Naddik [55]

Answer:

(64-23)8.3

Step-by-step explanation:

Solve the parenthesis first, then multiply

hope this helps! :)

3 0
3 years ago
Please help asap I need this for a test and I’m failing
RideAnS [48]

Answer:

perpendicular  bisector

Step-by-step explanation:

sorry if im wrong

3 0
2 years ago
Read 2 more answers
I need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Zina [86]

Answer:

Yes, x and y have a proportional relationship.  

Step-by-step explanation:

A proportional relationship means that, when comparing two quanities, that they are both changing at a constant (same) amount.  When looking at a table to compare quantities, you can see that the pounds of tomatoes 'x' is increasing by one (1) each time.  If you look at the amount spent in dollars 'y', you can see that for each pound (x), the cost is increasing by $4.  So, since for every pound of tomatoes that is purchased increases by $4, then their relationship is proportional.  

8 0
2 years ago
A scale on a blue print drawing of a house shows that 66 centimeters represents 33 meters. What number of centimeters on the blu
aksik [14]
To find the ratio of centimeters to meters you need to divide 66 by 33 to get 2.
Then multiply 2727 by 2 to get 5454.
5 0
3 years ago
28340 divided by 65 equals what<br><br><br> in need help ASAP please HELPPPP!!!!!!!!!!!!!
I am Lyosha [343]

Answer:

436

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Analyze the diagram below and answer the question that follows.
    13·2 answers
  • Write and solve the equation and then check your answer. Which statements are true about the equation and its solution? Check
    6·3 answers
  • X2 + (y - 1) 2 = 4 .............................
    14·2 answers
  • Please help me out !!!!
    13·1 answer
  • The double number line shows that Toni can type 180 words in 2 minutes.
    8·2 answers
  • A manufacturer of paper coffee cups would like to estimate the proportion of cups that are defective (tears, broken seems, etc.)
    6·1 answer
  • Quiennzmamamsmmsmsmsmssnzns
    6·1 answer
  • What is the degree of angle YQR​
    14·1 answer
  • Suppose that weight of adolescents is being studied by a health organization and that the accompanying tables describes the prob
    5·1 answer
  • Which is an appropriate estimate
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!