Work out an approximation for 3.1 x 9.87​

Answers

Answer 1

Answer:

3 x 10= 30

Step-by-step explanation:

Round 3.1 to 3. Round 9.87 to 10. Plug numbers in.

Answer 2

Answer:

30.597

Step-by-step explanation:

3.1×9.87 (3 decimal places)

So, 31×987 = 30,597

Place the decimal places hence, 30.597


Related Questions

Pls help with this it’s easy
If u click there will be pic

Answers

Answer:

15, the second one.

Step-by-step explanation:

We can use this proportion:

[tex]\frac{centimeters}{meters}[/tex]

So, in this case:

[tex]\frac{5 centimeters}{20 meters}[/tex]=[tex]\frac{x centimeters}{60 meters}[/tex]

We can cross multiply, resulting in:

[tex]20x = 300 centimeters[/tex]

Divide both sides by 20, resulting in:

[tex]x = 15 centimeters[/tex]

Joyce purchased 84.92 in groceries and gives the clerk $100 bill how much change should the clerk give back to her

Answers

Answer:

$15.08

Step-by-step explanation:

When subtract 84.92 from 100 you get 12.08 which is how much he clerk should give back

Answer:

15.08

Step-by-step explanation:

An airplane on autopilot took 5 hours to travel 3540 kilometers. What is the unit rate for kilometers per​ hour?

Answers

Answer:

708 km.

Step-by-step explanation:

3540/5=708

Answer:

708 km/h

Step-by-step explanation:

3540 / 5 = 708

A triangular bandana has an area of 78 square inches. The height of the triangle is 9 3 4 inches. Enter and solve an equation to find the length of the base of the triangle. Use b to represent the length of the base. An equation to find the length of the base of the triangle is 78= The length of the base of the triangle is inches.

Answers

 Area of triangle = 1/2 x base x height:

78 = 1/2 x base x 9 3/4

Multiply both sides by 2:

156 = base x 9 3/4

Divide both sides by 9 3/4:

Base = 16 inches

plss help mee
Show your work and not just the answer thank you

If two people share three hamburgers, how much should each person get?​

Answers

If two people shared three hamburgers then each person would get one hamburger and a half. Since there are two people and three hamburgers, both people can get one hamburger and split the third. In decimal form, It would be 1.5

Answer:

The answer is 3 because 6÷2 which equal 3 which is represent the three hameburgers and 6÷2=3 because there would be 6 hamburgers to share between two people.

3/7 + 5/6 ii) -3/15 x 7​

Answers

Question #1 Answer

[tex]\frac{53}{42}[/tex]

Step-by-step explanation:

Calculate

[tex]\frac{3}{7}+\frac{5}{6}[/tex]

Find common denominator and write the numerators above common denominator

[tex]\frac{3\times6}{7\times6}+\frac{5\times7}{6\times7}[/tex]

Calculate the product or quotient

[tex]\frac{18}{7\times6}+\frac{5\times7}{6\times7}[/tex]

[tex]\frac{18}{42}+\frac{5\times7}{6\times7}[/tex]

[tex]\frac{18}{42}+\frac{35}{6\times7}[/tex]

[tex]\frac{18}{42}+\frac{35}{42}[/tex]

Write the numerators over common denominator

[tex]\frac{18+35}{42}[/tex]

Calculate the sum or difference

[tex]\frac{53}{42}[/tex]

Question #2 Answer

[tex]-\frac{7}{5}[/tex]

Step-by-step explanation:

Calculate

[tex]-\frac{3\times7}{15}[/tex]

Cross out the common factor

[tex]-\frac{7}{5}[/tex]

I hope this helps you

:)

|b] + b3; b = -2


Evaluate the expression for the given value of the variable.

Answers

Answer:

b + b3

-2 + (-2×3)

-2 + (-6)

-2 - 6

= -8

Write an equation with a slope of -5 And a y-intercept Of 0

Answers

[tex]\begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}\implies y=\stackrel{\stackrel{m}{\downarrow }}{-5}x+\underset{\stackrel{\uparrow }{b}}{0}\implies y=-5x[/tex]

An article reported the following data on oxygen consumption (mL/kg/min) for a sample of ten firefighters performing a fire-suppression simulation:

28.2 49.2 30.9 28.8 28.0 25.9 34.0 29.0 23.8 30.1

Compute the following. (Round your answers to four decimal places.)

a. The sample range.
b. The sample variance s2 from the definition
c. The sample standard deviation
d. s2 using the shortcut method.

Answers

Answer:

a)Range= 25.9

b)Variance =49.344

c)Standard deviation=7.0245

Step-by-step explanation:

Data : 28.2 49.2 30.9 28.8 28.0 25.9 34.0 29.0 23.8 30.1

Maximum Value : 49.4

Minimum Value : 23.5  

Range= Maximum - Minimum

Range= 49.4 -23.5 = 25.9

(b)

[tex]Mean=\bar{x}=\frac{\sum x}{n}=\frac{309.2}{10}=30.92\\\\Variance=s^{2}=\frac{\sum \left ( x-\bar{x} \right )^{2}}{n-1}=49.344[/tex]

(c) Sample standard deviation:

[tex]s=\sqrt{\frac{\sum \left ( x-\bar{x} \right )^{2}}{n-1}}=7.0245[/tex]

d)s2 using the shortcut method.

            X          [tex]X^2[/tex]

          28.6 817.96

          49.4 2440.36

          30.3 918.09

          28.2 795.24

         28.9 835.21

         26.4 696.96

        33.8 1142.44

         29.9 894.01

         23.5 552.25

          30.2 912.04

Total   309.2 10004.56

[tex]s=\sqrt{\frac{\sum x^{2}_{i}-\frac{\left ( \sum x_{i} \right )^{2}}{n}}{n-1}}\\s=\frac{10004.56-\frac{309.2^{2}}{10}}{9}\\s=7.0245[/tex]

1. A certain small factory employs 98 workers. Of these, 10 receive a wage of $150 per day and the rest receive $85.50 per day. To the management, a week is equal to 6 working days. How much does the factory pay out for each week

Answers

Answer:hello I'm from Philippines

Step-by-step explanation:

2/3 of the students in Sarah’s class are boys. Of the boys, 1/3 of them wear glasses. What fraction of the students are boys that wear glasses? Choose the model that matches the situation.

Answers

Answer:

1/3 of the boys of course

Answer:

chosse the box that is 3x3 in width and has 1 shaded in

Step-by-step explanation

Solve: x2 - 2x + 1 = 4
Please help me

Answers

Let's solve your equation step-by-step.

x2−2x+1=4

Step 1: Subtract 4 from both sides.

x2−2x+1−4=4−4

x2−2x−3=0

Step 2: Factor left side of equation.

(x+1)(x−3)=0

Step 3: Set factors equal to 0.

x+1=0 or x−3=0

x=−1 or x=3

Answer:

x=−1 or x=3

Note: enter your answer and show all the steps that you use to solve this promblem in the sentence below.
At the halftime show, a marching band in formation. the lead drummer started a point with coordinates (-2,-5) and move 3 steps up and 1 step right.

A. Write a rule to describe it the translation.
B. What were the coordinates of the drummer's final position?​

Answers

Answer:

a) The answer is: (x + a, y + b)

b) The answer is: (-1, -2)

The initial coordinates are:

(x, y) = (-2, -5)

Let's find a and b.

a is a distance in x direction: a = 1

b is a distance in y direction: b = 3

The final position is:

(x + a, y + b) = (-2 + 1, -5 + 3) = (-1, -2)

Step-by-step explanation:

8. A tree on a 30° slope grows straight up. What are the measures of the
greatest and smallest angles the tree makes with the hill? Explain.

Answers

Brainlist Please!!

the slope makes a 30-degree w/ the horizon, then we can draw it out by making a right triangle out of it
we'll get a 30-60-90 triangle
the tree will make 2 angles w/ the slope, one on each side.
so draw the tree on the slope, then you'll get a 60 and 120 degree
it'd be easier if you visualize this problem
hope it helps! I know I sound confusing

The measure of the smallest angle of a tree with a hill is 60°.

The measure of the greatest angle of a tree with a hill is 120°.

Given:

A tree on a 30° slope grows straight up.

To find:

The measures of the

greatest and smallest angles the tree makes with the hill.

Solution:

In figure drawn:

[tex]\angle PQR = 30^o[/tex]

AB= Straight three

Construction:

Draw a parallel line CA to QR through point A.

Now,

[tex]\angle PQR = \angle PAC = 30^o\\\\\angle PAC +\angle PAB = 90^o \text{(Complimentary angles)}\\\\\angle PAB = 90^o -\angle PAC\\\\angle PAB=90^o-30^o=60^o[/tex]

The measure of the smallest angle of a tree with a hill is 60°.

[tex]\angle PAB + \angle BAQ= 180^o\text{(Supplementary angles)}\\\\ \angle BAQ= 180^o-\angle PAB \\\\ \angle BAQ=180^o-60^o=120^oC[/tex]

The measure of the greatest angle of a tree with a hill is 120°.

Learn more about complementary and supplementary angles here:

brainly.com/question/928628?referrer=searchResults

brainly.com/question/3027144?referrer=searchResults

Write an inequality for the statement provided :

The cargo of the truck weighs at most 3,000 pounds

Answers

Answer:   [tex]w \le 3000[/tex]

w is the weight of the truck in pounds.

Since w cannot be negative, we can write [tex]0 \le w \le 3000[/tex] or we could tack on the statement "w must be positive"

The phrase "at most" means "that is the largest w can get". Think of it as the ceiling.

Find the value of X
WILL MARK BRAINLIEST IF CORRECT!

Answers

Answer:

x = 52

Step-by-step explanation:

This is a picture of a right angle, which is 90 degrees. We should first make an equation to represent this problem.

(x - 12) + 50 = 90

1. Subtract 50 from both sides of the equation.

(x - 12) = 40

2. Add 12 from both sides of the equation

x = 52

The value of x is 52.

Answer:

52°

....

....

....

....

............

When a result from a simple is extended to the population

Answers

Answer:

You can opt to study the entire population when the population is well defined(Complete sampling frame) and small.

It can eliminate any potential bias occurring through sampling technique, but other than that it is really not justified to consume more resources and time.

Convert to find the equivalent rate
840 magazines /week into magazines/hour​

Answers

Answer:

5 magazines per hour are manufactured

Mr & Mrs Brown bought a new kitchen table for $450 it was 75% of the original price determine the original price of the kitchen table

Answers

The answer is $112.50.
If you take $450 and divide it by 0.75 you get 337.5 and you subtract that from the original $450.

Use the appropriate conversions listed to convert 80 cups into gallons. Round to the nearest hundredth

Answers

Answer:

5 gallons

Step-by-step explanation:

You divide the number of cups by 16 to find how many gallons are there in a certain amount of cups.

What is the main advantage of a credit union compared to a payday or title
lender?
A. Credit unions often require collateral, unlike payday and title
lenders.
B. Credit unions usually require loans to be paid back in installments,
unlike payday and title lenders.
C. Credit unions usually offer lower interest rates than payday and
title lenders.
D. Credit unions offer loans to nonmembers, unlike payday and title
lenders.

Answers

It should be noted that main advantage of a credit union compared to a payday or title is that Credit unions usually offer lower interest rates than payday and title lenders.

What is credit union?

Credit unions  serves as financial institutions, like banks, and  are nonprofit entities that aim to serve their members.

Therefore, Credit unions usually offer lower interest rates than payday and title lenders.

Learn more about credit union at;

https://brainly.com/question/2279124

what kind of polynomial is -2

Answers

Hi! I hope you're enjoying your day!

Here's how we classify polynomials:

Number of termsExponent (degree)

More Information:

A polynomial with 1 term is called a monomial (for example, 6d)

A polynomial with 2 terms is called a binomial (for example, 6d+ 2a)

A polynomial with 3 terms is called a trinomial (for example, 6d+2a-4s)

A polynomial with 4 or more terms is called a polynomial

(for example. 6d+2a-4s+3e-t+9k-12a)

Degree: first, second, third.. depends on the exponent.

Hence, -2 is

[tex]\boxed{\boxed{\bold{first-degree\;monomial}}}[/tex]

Hope everything is clear.

Let me know if you have any other questions; if you do, feel free to use the comment section.

#LearningIsFun

Dana is making a seating chart for an awards banquet. There are 120 people coming to the banquet.If 8 guests can be seated at each table, how many tables will be needed for seating for the awards banquet?

Answers

Answer: 15

Explanation: 120/8 will give you 15 tables.

Find the area of the figure. (Sides meet at right angles.)
2 ft
2 ft
\ ft
bft
8 ft
8 ft
4 ft
8 ft

Answers

Answer:

44 ft²

Step-by-step explanation:

A1 = 2(5 x 2) = 20

A2 = 8 x 3 = 24

total = 20 + 24

       = 44 ft²

Please answer this correctly without making mistakes

Answers

Answer:

The answer is 10 months

Step-by-step explanation:

a chess club has 20 girls and 15 boys. seven of the girls and 7 of the boys in the chess club are also in the math club.

what percent of the students in the chess club are also in math club?​

Answers

Answer:

40% why? because 20+15=35 that is the total but they are saying 7 boys and 7 girls are in math and chees so is 14 14/35 is 40%

Which expression is equivalent to V-80 ?
0 -4.75
O-4V51
O 451
O 4.5

Answers

[tex]i = \sqrt{-1}\\\\\\\sqrt{-80} = \sqrt{-1*16*5}\\\\\\\sqrt{-80} = \sqrt{-1}*\sqrt{16}*\sqrt{5}\\\\\\\sqrt{-80} = i*4*\sqrt{5}\\\\\\\sqrt{-80} = 4i\sqrt{5}\\\\\\[/tex]

what is the midpoint of AB if A = (-2,2) and B=(3,-1)?​

Answers

Answer:

Midpoint = [tex](\frac{1}{2},\frac{1}{2} )[/tex]

Step-by-step explanation:

Midpoint formula: [tex](\frac{x_1+x_2}{2} , \frac{y_1+y_2}{2} )[/tex]Plug in value: [tex](\frac{-2+3}{2} , \frac{2+(-1)}{2} )[/tex]Do the math: [tex](\frac{1}{2} ,\frac{1}{2} )[/tex]

the area of a rectangle is 30 to the square root of 3750 square inches, and the length is 3 to the square root of 250 inches. what is the width of the rectangle?

Answers

Answer:

[tex] \sf { width =10 \sqrt{15} \:inches}[/tex]

Solution:

We are given that:

Area of rectangle is 30√3570Length of the rectangle is 3250

Area of rectangle is given by:

[tex] \implies\quad{\pmb{ \sf{Area = length\times width}} }[/tex]

Hence, putting the values in the formula:

[tex] \implies\quad \sf{ A = l\times w}[/tex]

[tex] \implies\quad \sf{ 30\sqrt{3750}=3\sqrt{250}\times w}[/tex]

[tex] \implies\quad \sf{3\sqrt{250}\times w = 30\sqrt{3750} }[/tex]

[tex] \implies\quad \sf{ w =\dfrac{30\sqrt{3750}}{3\sqrt{250}}}[/tex]

[tex] \implies\quad \sf{ w =10\dfrac{\sqrt{3750}}{\sqrt{250}}}[/tex]

[tex] \implies\quad \sf{ w = 10\times\sqrt{\dfrac{3750}{250}}}[/tex]

[tex] \implies\quad \underline{\underline{\pmb{\sf{ w =10\sqrt{15}}}}}[/tex]

FIRST PERSON TO CORRECTLY ANSWER GETS BRAINLIEST AND A THANK U SO HURRY

Answers

Answer:

Statement:

EOB; AOB180°90°2x°30°

Reason:

GivenGivenGiven

Step-by-step explanation:

x + 2x + 90 = 180

3x + 90 = 180

3x = 90

x = 30°

Answer:

vefgdv

Step-by-step explanation:

fsssssssssssssssssssssss

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