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
Zepler [3.9K]
3 years ago
11

What is best estimate for 31.9 divide by 4

Mathematics
2 answers:
abruzzese [7]3 years ago
5 0
So, if you had two estimates for 31.9, they would be relatively close to the number itself. Here are some estimates:

32.0 ÷ 4 = ?

30.0 ÷ 4 = ?

Okay, so, you have your two rough estimates of what 31.9 ÷ 4 could equal up to. Since 31.9 ÷ 4 equals 7.975. You could divide the estimations by the same number and recieve a close enough answer. Remember, estimations aren't accurate. 

32.0 ÷ 4 = 8

30.0 ÷ 4 = 7.5

Now that you see what those quotients are, take a look at the accurate estimate again. You see that 31.9 equals 7.975. Let's look at this closer.

7.975
is really equivalent to 8.0 or 8.

How is that the equivalent? Well, if you take a look at the first two numbers, you'll see that 7.9 can be rounded to 8, leaving the numbers behind it as zeros.

How I remember when to round: 5 and above, give it a shove, 4 and below, keep the number I know. 

Basically meaning: If the number isn't above 5, keep the same number you started with.

So, your rough estimate to 31.9 ÷ 4 is equal to 8.

I hope I helped :)
butalik [34]3 years ago
3 0
Hi there.

The best way to estimate starts by rounding.

31.9 rounds up to 32.

32/4 = 8

The best estimate for 31.9 divided by 4 is 8.

Let me know if you spot any errors :)
You might be interested in
What value of z makes the statement true?
Shkiper50 [21]
-(z + (-17)) = 12 + 17

-(z - 17) = 12 + 17

Distribute -1:

-z + 17 = 12 + 17

Subtract 17 to both sides:

-z = 12

Multiply -1 to both sides:

z = -12
4 0
3 years ago
If x = 0 and y > 0, where is the point (x,y) located?
pochemuha

Answer: it would be 13

Step-by-step explanation:

8 0
3 years ago
What will be the cost for 8 hours of work? 10 hours of work?​
andreyandreev [35.5K]

Answer:

<u>Cost = 25 + 50h</u>

cost for 8 hours of work = $425

cost for 10 hours of work = $525

Step-by-step explanation:

The question is as following:

A plumber charges $25 for a service call plus $50 per hour of service write an equation to represent the cost of hiring this plumber​.

what will be the cost for 8 hours of work? 10 hours of work?​

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

A plumber charges $25 for a service call plus $50 per hour

<u>Cost = 25 + 50h</u>

Where h is the number of hours of service

8 hours of work: h = 8

Substitute with h = 8 at the equation of cost

<u>Cost = 25 + 50* 8 = $425</u>

10 hours of work: h = 10

Substitute with h = 10 at the equation of cost

<u>Cost = 25 + 50 * 10  = $525</u>

6 0
3 years ago
For what values of m does the graph of y = 3x^2+ 7x + m have two x-intercepts?
qaws [65]

Answer:

m < 49/12

Step-by-step explanation:

The portion of the quadratic formula under the square root sign is the discriminant.

If the discriminant is > 0 then there are two real roots.

b² -4ac > 0

-----------------------------

7² - 4(3)m > 0

49 - 12m > 0

Subtract 49 from both sides

-12m > -49

Divide both sides by -12

(when multiplying or dividing by a negative the inequality must be reversed)

m < 49/12

8 0
3 years ago
Will's Pizza can make 12 pizzas in 45 minutes. How many pizzas can they make in 4 hours?
irina1246 [14]

Answer:

64 pizzas

Step-by-step explanation:

4 hours is 240 minutes

12 x (240 / 45) = 64

8 0
2 years ago
Read 2 more answers
Other questions:
  • Will give BRAINEST
    7·1 answer
  • Using the image below, find the y value for the point that divides the line segment XY into a ratio of 1.2
    15·1 answer
  • Please help me with this one
    14·1 answer
  • elaina wrote two correct variable expressions to represent the phrase “one-fourth of a number.” which variable expressions could
    11·2 answers
  • Please Help!!! 5 STARS<br> Let cos(−θ)=45 and tanθ&gt;0 .<br><br> What is the value of sin(−θ) ?
    13·1 answer
  • Online jewelry sales have increased steadily over the last 10 years. In 2003, sales were approximately 2 billion dollars, and in
    13·1 answer
  • How do you solve this problem?<br><br><img src="https://tex.z-dn.net/?f=x%20%5E%7B2%7D%20-%20%202x%20-%20%203" id="TexFormula1"
    11·2 answers
  • HELP!! <br> A. 40<br> B. 50<br> C. 90<br> D.180
    14·1 answer
  • In a race, Jason's position was -11 1/5 feet relative to the leader after 1 3/4 minutes. On average, how much did Jason's positi
    12·1 answer
  • What is the prime factorization of -14x^4
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!