I’m confused on what the answer is. Can anyone help me?

Answer:

140

-2.6

0

Step-by-step explanation:

60 -(-80) if there is - - that means +

60 + 80 = 140

2.3 + (-4.9) if its + - it just means - ignore the plus

2.3 - 4.9

-2.6

4.5 + (-4.5)

0

Answer:

a.140

b. -2.6

c. 0

Step-by-step explanation:

a.60-(-80)= 60+80 because two negatives make a positive

=140

b. 2.3+(-4.9)= 2.3-4.9

= -2.6

c. 4.5+(-4.5)=0

Answer:

20 feet

Step-by-step explanation:

[tex]\frac{80 feet}{40 seconds}[/tex]  = [tex]\frac{x feet}{10 seconds}[/tex]

Simplify [tex]\frac{80}{40}[/tex]

[tex]\frac{80}{40}[/tex] = [tex]\frac{2}{1}[/tex]

Every 1 second, a person will walk 2 feet.

[tex]\frac{x}{10}[/tex] = [tex]\frac{20}{10}[/tex]

X = 20 feet

Answer:

20 feet

Step-by-step explanation:

We can solve this two different ways:

The 1st and easiest way would be to first divide [tex]40/10[/tex] to get [tex]4[/tex], and then divide [tex]80/4[/tex] to get [tex]20[/tex].

This method works well in this situation because all the numbers are easily divisible, but in some situations this method may give you decimals which would make things more difficult.

In a situation like that, you would create a simple equation using this format: [tex]y=m(x)[/tex] in which [tex]y[/tex] represents the total number of feet walked, [tex]m[/tex] represents the number of seconds, and [tex]x[/tex] represents number of feet walked per minute.

You would start by finding out the number of feet walked per minute. You do this by plugging the information you know into the equation. We know that the person walks 80 feet in 40 seconds so the equation would look like this: [tex]80=40x[/tex]

To solve for [tex]x[/tex], you would then divide 40 on both sides to get [tex]2=x[/tex]

Now that we know that the person walks 2 feet every second, we can plug the information into a new equation to find out how far they go in 10 seconds. This equation will look like this: [tex]y=10(2)[/tex] and we can solve it to learn that [tex]y=20[/tex]. This means that the person will walk 20 feet in 10 seconds.

Answer:

6/2

Step-by-step explanation:

10-4=6

-1-(-3)

-1+3=2

6/2

the answer you are looking for is A

Answer:A runner ran 20 miles in 150 minutes. If she runs at that speed,. How long would it take her to run 6 miles? ... How fast is she running in miles per hour? ... experience in reasoning with equivalent ratios and unit rates from both sides of the ratio.

Step-by-step explanation:

Answer:

0.2 hours

Step-by-step explanation:

Givens

2/4 mile = 1/2 mile when 2/4 is reduced. 1/2 = 0.5 miles in decimal form.

1/10 = 0.1

0.5 miles        1 mile    

=======      =  ======

0.1 hours         x hours

Solution

Cross multiply

x* 0.5 = 0.1 * 1                        Combine

0.5 x = 0.1                              Divide by 0.5

x = 0.1/0.5

x = 0.2                                   hours.

Answer: Width = 18m

Length = 32m

Step-by-step explanation:

Let the width of a rectangle be x

Let the length of the rectangle be: x+14

Width = 18m

Length = 32m

Check the attachment for the explanation and further details.

Answer:

The answer is 6 N

Step-by-step explanation:

Answer: 7/8

Step-by-step explanation:

First, we can start by finding a common denominator.

The least common denominator of 8 and 4 is 8.

We can multiply the numerator and denominator of 3/4 by 2:

= 6/8

So, we are esssentially calculating 1/8 + 6/8. We can add the numerators:

= 7/8.

Answer:

explantion IS the answer

Step-by-step explanation:

To estimate the square root of a number, we could start by relating the square to known perfect squares. 125 is between 11 and 12. It is probably closer to 11 since 125 is closer to 121 than to 144.

Answer:

17 feet

Step-by-step explanation:

Since it's a cube, you just take the cube root of the volume.

So,

[tex]\sqrt[3]{4913}[/tex]=17

Answer:

Pigs = 17

Ducks = 6

Step-by-step explanation:

Let there be x pigs and y ducks in the field.

[tex]\implies x + y =23[/tex]

[tex]\implies y =23-x.....(1)[/tex]

Since, there are 80 legs in all.

Each pig has 4 legs and each duck has 2 legs. So, x pigs will have 4x legs and y ducks will have 2y legs.

Total legs = 4x + 2y

Total legs = 80 (Given)

[tex]\implies 4x + 2y =80....(2)[/tex]

From equations (1) & (2), we find:

[tex]\implies 4x + 2(23-x) =80[/tex]

[tex]\implies 4x + 46-2x =80[/tex]

[tex]\implies 2x =80-46[/tex]

[tex]\implies 2x =34[/tex]

[tex]\implies x =\frac{34}{2}[/tex]

[tex]\implies x =17[/tex]

[tex]\implies y =23-17[/tex]

[tex]\implies y =6[/tex]

Answer:

22.3

Step-by-step explanation:

Answer:

He rented the bike for 2 hours.

Step-by-step explanation:

Since a bike costs $13 plus $5 per hour, we can write this as:

13 + 5(h)

We used "h" as the variable for hours, since we need to find how many hours he rented the bike for, that he had to pay $23.

And since Pete paid $23, we need to make the other equation equal to 23.

= 23

So the actual equation, would look like this:

13 + 5(h) = 23

Now we just solve for h in the equation:

13 + 5(h) = 23

Step 1: Multipy 5 times "h"

13 + 5h = 23

Step 2: Subtract 13 from both sides

13 + 5h - 13 = 23 - 13

Step 3: Simplify

5h = 10

Step 4: Divide both sides by 5

5h/5 = 10/5

Step 5: Simplify

h = 2

So the number of hours that Pete rented the bike for 2 hours

Answer:

16

Step-by-step explanation:

6x-7=2x+3 Cause point M is the midpoint, so JM and MK have to be equal.

4x=10

x=2.5

JM=15-7=8 and MK=5+3=8

8+8=16

Hey there!

Plug in the value of x and evaluate:

x²-16x+64

(-4)²+16(-4)+64

16-64+64

16

Hence, the answer is 16.

Hope everything is clear.

Let me know if you have any questions!

#LearningDoesn'tEnd

:-)

Answer:

D (195,500,000)

Step-by-step explanation:

8.5 mil times 23 equals D

The number of people living in Brazil that year was approximately  195,500,000 people. The answer is the last option 195,500,000 people

From the question, we are to determine the number of people living in Brazil in that year

From the given information,

Brazil land area = 8.5 million square kilometers = 8500000 km²

Brazil population density = Peru population density = 23 people /km²

From population density formula,

[tex]Population\ density = \frac{Number \ of \ people}{Land\ area}[/tex]

Then,

Number of people = Population density × Land area

Therefore,

Number of people living in Brazil = 8500000 × 23

Number of people living in Brazil = 195,500,000 people

Hence, the number of people living in Brazil that year was approximately  195,500,000 people. The answer is the last option 195,500,000 people

Learn more on Population density here: https://brainly.com/question/26910545

Answer:

The greatest common factor (GCF) is the largest factor that divides two numbers and a factor is a number that divides into another number exactly so...

1)

10: 1,2,5,10

20: 1,2,4,5,10, 20

*10 is the GCF

2)

12: 1, 2, 3, 4, 6, 12

16: 1, 2, 4, 8, 16

*4 is the GCF

3)

27: 1, 3, 9, 27

36: 1, 2, 3, 4, 6, 9, 12, 18, 36

*9 is the GCF

Answer:

Step-by-step explanation:

I'm going to assume it is a rectangle.

P = 2L + 2w = 34

Area = L * w = 60                        Divide by L

w = 60/L                                      Substitute into the perimeter.

P = 2L + 2w = 34                         Put (60/L) for w

P = 2L + 2(60)/L = 34                  Multiply  both sides by L

P = 2L^2 + 120 = 34L                  Subtract 34L from both sides.

2L^2 - 34L + 120 = 0                   Divide everything by 2

L^2 - 17L + 60 = 0                        Factor

(L - 5)(L - 12) = 0

Since L is usually the larger value, use L = 12

L*w = 60

12w = 60

w = 60/12

w = 5

Answer

Answer:

-10

Step-by-step explanation:

start at 0 and move backwards 5(gives you -5) then move backwards 5 more(-10)

Answer:

24 hours

Step-by-step explanation:

This is because they seem to be stationary about one point on the surface of earth. This is possible when the satellite has the same angular speed as the earth.

This means that it takes the same amount of time to the satellite to take one revolution around the earth as it takes the earth to take one revolution about its axis.

[tex]w=\frac{revolutions}{time}[/tex]

[tex]w_{satellite}=w_{earth}[/tex]

[tex]\frac{N_{satellite}}{t_{satellite}}=\frac{N_{earth}}{t_{earth}}[/tex]

since [tex]N_{satellite}=N_{earth}[/tex]

then, when solving for t we get that:

[tex]t_{satellite}=t_{earth}[/tex]

To find the x-intercept, substitute 0 for y and solve for x.

To find the y-intercept, substitute 0 for x and solve for y.

x-intercepts : (4, 0), (1, 0)

y-intercepts : (0, 4)

Answer:

2 result(s) found

t=2

t=

2

11

​

=5.500

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    2*t^2-(15*t-22)=0

Step by step solution :

STEP

1

:

Equation at the end of step 1

 2t2 -  (15t - 22)  = 0

STEP

2

:

Trying to factor by splitting the middle term

2.1     Factoring  2t2-15t+22

The first term is,  2t2  its coefficient is  2 .

The middle term is,  -15t  its coefficient is  -15 .

The last term, "the constant", is  +22

Step-1 : Multiply the coefficient of the first term by the constant   2 • 22 = 44

Step-2 : Find two factors of  44  whose sum equals the coefficient of the middle term, which is   -15 .

     -44    +    -1    =    -45

     -22    +    -2    =    -24

     -11    +    -4    =    -15    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -11  and  -4

                    2t2 - 11t - 4t - 22

Step-4 : Add up the first 2 terms, pulling out like factors :

                   t • (2t-11)

             Add up the last 2 terms, pulling out common factors :

                   2 • (2t-11)

Step-5 : Add up the four terms of step 4 :

                   (t-2)  •  (2t-11)

            Which is the desired factorization

Equation at the end of step

2

:

 (2t - 11) • (t - 2)  = 0

STEP

3

:

Theory - Roots of a product

3.1    A product of several terms equals zero.

When a product of two or more terms equals zero, then at least one of the terms must be zero.

We shall now solve each term = 0 separately

In other words, we are going to solve as many equations as there are terms in the product

Any solution of term = 0 solves product = 0 as well.

Solving a Single Variable Equation:

3.2      Solve  :    2t-11 = 0

Add  11  to both sides of the equation :

                     2t = 11

Divide both sides of the equation by 2:

                    t = 11/2 = 5.500

Solving a Single Variable Equation:

3.3      Solve  :    t-2 = 0

Add  2  to both sides of the equation :

                     t = 2

Supplement : Solving Quadratic Equation Directly

Solving    2t2-15t+22  = 0   directly

Earlier we factored this polynomial by splitting the middle term. let us now solve the equation by Completing The Square and by using the Quadratic Formula

Parabola, Finding the Vertex:

4.1      Find the Vertex of   y = 2t2-15t+22

Parabolas have a highest or a lowest point called the Vertex .   Our parabola opens up and accordingly has a lowest point (AKA absolute minimum) .   We know this even before plotting  "y"  because the coefficient of the first term, 2 , is positive (greater than zero).

Each parabola has a vertical line of symmetry that passes through its vertex. Because of this symmetry, the line of symmetry would, for example, pass through the midpoint of the two  x -intercepts (roots or solutions) of the parabola. That is, if the parabola has indeed two real solutions.

Parabolas can model many real life situations, such as the height above ground, of an object thrown upward, after some period of time. The vertex of the parabola can provide us with information, such as the maximum height that object, thrown upwards, can reach. For this reason we want to be able to find the coordinates of the vertex.

For any parabola,At2+Bt+C,the  t -coordinate of the vertex is given by  -B/(2A) . In our case the  t  coordinate is   3.7500  

Plugging into the parabola formula   3.7500  for  t  we can calculate the  y -coordinate :

 y = 2.0 * 3.75 * 3.75 - 15.0 * 3.75 + 22.0

or   y = -6.125-0

Answer:

129

Step-by-step explanation:

pls heart and give brainliest much appreciated

Answer:

5/7

Step-by-step explanation:

Answer:

slope=5/7

Step-by-step explanation:

y-y=m(x-x)

7-2=m(3+4)

5=m(7)

5/7=m

Answer:

True

Step-by-step explanation:

Answer:

i would say that A. would be the answer...because 0 is a #number.

Answer:

so it's number 2

Step-by-step explanation:

just try it I'm sure it's right

Answer:

Second option: y = 5(x + 2)

Step-by-step explanation:

Equation that is already graphed: y = 5x - 10

Let's use the second option: y = 5(x + 2)

Since y = 5x - 10,  we substitute 5x - 10 into the equation y = 5(x + 2)

The equation will look like this: 5x - 10 = 5(x + 2)

Now we solve: 5x - 10 = 5(x + 2)

5x - 10 = 5(x + 2)

Distribute

5x - 10 = 5x + 10

Rearrange variables to the left side of the equation

5x - 5x = 10 + 10

Apply the inverse property of addition

0 = 10 + 10

Add 10 and 10

0 = 20

Therefore, there is no solution

Answer:

3.14 cube .yd

Step-by-step explanation:

Volume of cylinder= πr^2h

is 16 m2 for the answer hope this works

Answer:

∠ 3 = 35°

Step-by-step explanation:

∠ 5 and ∠ 3 are alternate angles and congruent, thus

∠ 3 = ∠ 5 = 35°