Mathematics Middle School

A student spent 4/7 of an hour each evening reading a book about whales if it took the student 9 evenings to finish the book how many hours in all did the student spend reading
5 1/7 6 1/7 5 2/7

Answers

Answer 1

Answer:

5 1/7

Step-by-step explanation:

Look at the attachment

A Student Spent 4/7 Of An Hour Each Evening Reading A Book About Whales If It Took The Student 9 Evenings

Related Questions

HELP ASAP PLEASEEEE!

Answers

Answer:

it is c

Step-by-step explanation:

Which is the longest length?
a 1 yd. 20 in.
b 1yd. 1 ft.
С
40 in.
d 3 ft.

Answers

Answer:

a-1yd20in

Step-by-step explanation:

a-4ft 8in

b-4ft

c-3ft 4in

d-3ft

Answer:

it's A, one yard and 20 inches

Step-by-step explanation:

If you convert them all to inches,  a yard and a 20 inches are equal to 56 inches, so you can rule out the 40 inches answer. a yard and a foot are equal to 48 inches, so we can rule out that also. 3 feet is equal to 36 inches, because we know that a foot is equal to 12 inches. so you are left with A. 1 yard and 20 inches.

find the vertex of the parabola represented by the function f(x)= -2x^2

Answers

Hey there !

The vertex of this parabola is the origin or, (0 , 0)

Hope this helps !

Reasoning in a laboratory, the probability a bacterial colony thrives is 70%. The numbers 0 to 6 represent the outcome that a colony thrives. The numbers 7 to 9 represent the outcomes that a colony does not thrive. The list of random numbers simulates the out comes of 4 colonies . Based On the simulation in 6 trails . what is the probability that exactly half of the colonies will thrive.
4285 6903 3829 7871 2868 5137

Answers

Answer:

The probability that exactly half of the colonies will thrive = (1/3) = 0.3333

Step-by-step explanation:

The list of random numbers simulates the out comes of 4 colonies.

Based On the simulation in 6 trails, what is the probability that exactly half of the colonies will thrive?

The probability of an event is given mathematically as the number of elements in the event divided the total number of elements in the sample space.

Noting that the numbers 0 to 6 indicate that a colony thrives and the number 7 to 9 represent that a colony doesn't thrive.

The 6 trials are given as

4285; 3 colonies thrive, 1 doesn't.

6903; 3 colonies thrive, 1 doesn't.

3829; 2 colonies thrive, 2 don't.

7871; 1 colony thrives, 3 don't.

2868; 2 colonies thrive, 2 don't.

5137; 3 colonies thrive, 1 doesn't.

The number of trials where exactly 2 colonies thrive = 2

The total number of trials = 6

The probability that exactly half of the colonies will thrive = (2/6) = (1/3) = 0.3333

Hope this Helps!!!

Write the number in standard form. 6.45×10^−4

Answers

Answer:

.000645

Step-by-step explanation:

.0006.45

move the decimal place 4 places to the Left because it is a negative.  

PLEASE HELP ME
I NEED IT

Answers

Answer:

[tex]\sqrt{24}[/tex]

Step-by-step explanation:

[tex]4\frac{4}{9}[/tex] cannot be correct because it equals 4.4.

[tex]\sqrt{20}[/tex] cannot be correct because it equals 4.5.

480% is 480/100 which equals 4.8 which is also not correct.

Therefore, [tex]\sqrt{24\\}[/tex] is correct because it is greater than 4.8 and less than 5.0.

If Kevin wants a 90 average in math after 5 tests and his first 4 tests are 76, 92, 89 and 97 what does he need on the fifth test for a 90 average?

Answers

You need to understand that you're solving for the average, which you already know: 90. Since you know the values of the first three exams, and you know what your final value needs to be, just set up the problem like you would any time you're averaging something.
Solving for the average is simple:
Add up all of the exam scores and divide that number by the number of exams you took.
(87 + 88 + 92) / 3 = your average if you didn't count that fourth exam.
Since you know you have that fourth exam, just substitute it into the total value as an unknown, X:
(87 + 88 + 92 + X) / 4 = 90
Now you need to solve for X, the unknown:
87
+
88
+
92
+
X
4
(4) = 90 (4)
Multiplying for four on each side cancels out the fraction.
So now you have:
87 + 88 + 92 + X = 360
This can be simplified as:
267 + X = 360
Negating the 267 on each side will isolate the X value, and give you your final answer:
X = 93
Now that you have an answer, ask yourself, "does it make sense?"
I say that it does, because there were two tests that were below average, and one that was just slightly above average. So, it makes sense that you'd want to have a higher-ish test score on the fourth exam.
Average = sum/count

current count = 4
current sum = 76+92+89+97=354

we need average = 90 = sum/5
so, we need sum = 90*5=450

To get sum 450, he needs to score 450-354=96 on his best test.

Now, (76+92+89+97+96)/5=90

5 CR
UTION
Abed says he has written a system of two linear equations that has an infinite number of solutions. One of the
equations of the system is y = 3x – 1. Which could be the other equation?
y = 3x + 2
3x - y = 2
3x - y = 1
3x + y = 1
Done

Answers

Answer:

3x - y = 1

Step-by-step explanation:

The system:

[tex]$\left \{ {{y = 3x -1} \atop {y = 3x + 2}} \right. $[/tex]

There is no solution to this system of equations.

The system:

[tex]$\left \{ {{y = 3x -1} \atop {3x - y = 2}} \right. $[/tex]

[tex]$\left \{ {{y = 3x -1} \atop { y = 3x-2}} \right. $[/tex]

The is one solution to this system.

The system:

[tex]$\left \{ {{y = 3x -1} \atop {3x - y = 1}} \right. $[/tex]

[tex]$\left \{ {{y = 3x -1} \atop { y = 3x-1}} \right. $[/tex]

There are infinity solutions to the system.

The system:

[tex]$\left \{ {{y = 3x -1} \atop {3x + y = 1} \right. $[/tex]

[tex]$\left \{ {{y = 3x -1} \atop { y = 1-3x}} \right. $[/tex]

The is one solution to this system.

In the diagram below, triangle A’B‘C‘ is a transformation of triangle ABC, and Triangle A”B”C” is a transformation of Triangle A’B’C’. Which of the following transformation will lead triangle ABC to triangle A”B”C”?





a) reflection followed by a rotation

b) translation followed by a rotation

c) translation followed by a reflection

Answers

Answer:

B. i think?

Step-by-step explanation:

What is the solution to the equation sqrt5X-7= sqrt3X+5?
x = 1
x = 6
x = 12
x = 24

Answers

Answer:

X=6

Steps are in the picture

Which of these graphs represents a function


A.w
B.x
C.y
D.z

Answers

the graph the represent a function is D.z because it shows an actual function

The correct option is D. The graph z is representing a quadratic function.

What is a quadratic function?

In algebra, a polynomial function with one or more variables in which the highest-degree term is of the second degree is known as a quadratic function, a quadratic polynomial, a polynomial of degree 2, or simply a quadratic.

The general form of the quadratic functions is represented as below:-

y = ax² + bx + c

Where a,b, and c are the constants x and y are variables.

The graph of the quadratic functions will be parabolic on the x-y plane.

Therefore, the correct option is D. The graph z is representing a quadratic function.

To know more about a quadratic function follow

https://brainly.com/question/7784687

#SPJ6

need help again lol plz

Answers

a) 0.6 > 0.09
b) >
c) =

girl this is easy

please help me! thank you

Answers

Answer:

13 pounds happy to help mark me as brainliest pls!!!

Step-by-step explanation:

20 points! I need the answer ASAP! Thanks!

Answers

Answer: y=5/7x+2

Step-by-step explanation:

The y- intercept would be 2 since that is where the line goes through the y axis. Also if you use slope form you will see that the slope is 5/7.

what is the greatest common factor of 33,15

Answers

Answer:

The answer is 3

Step-by-step explanation:

Three listening stations located at (3300, 0), (3300, 4400), and (-3300, 0) monitor an explosion. The last two stations detect the explosion 4 seconds and 4 seconds after the first, respectively. Determine the coordinates of the explosion. (Assume that the coordinate system is measured in feet and that sound travels at 1100 feet per second.)

Answers

Answer:

hang gang ok

i10 Njan malayalam verupikkal is my job

find the area of the trapezoid could you go​

Answers

Answer: 11.31372

Step-by-step explanation:

Find the height using pythagorean theorem

1+b^2=9

you should get radical 8

2. Then plug your values into the formula and you get your answer

Simplify, using the distributive property and then combining like terms. 5c+2(10−c)

Answers

Answer:

3c +20

Step-by-step explanation:

5c+2(10−c)

Distribute

5c+ 20 -2c

Combine like terms

3c +20

Answer:3c+20

Step-by-step explanation:

Distribute

5c+(2)(10)+(2)(-c)

5c+20+-2c

Combine Like Terms:

(5c+-2c)+(20)

3c+20

Hope I helped:)





The one-to-one functions g and h are defined as follows.
=g, , −7 1, , −4− 8, , 6 7 , 7− 3

=hx−2x3
Find the following

Answers

Answer:

g^−1(7) = 6

h^−1(x) = x/2 + 3/2

(h^−1 ∘ h)(3) = 3

Step-by-step explanation:

If

g(6) = 7

Then

g^−1(7) = 6

h(x) = 2x - 3

Isolate x:

2x = h(x) + 3

x = h(x)/2 + 3/2

Replace x with h^−1(x) and h(x) with x:

h^−1(x) = x/2 + 3/2

We know that:

(h^−1 ∘ h)(x) = x

then:

(h^−1 ∘ h)(3) = 3

Need help with this

Answers

Answer:

5 to the power of -2

Step by Step explanation:

Because you are diving, you need to subtract the powers.

For example, you subtract 10 from 12 to get -2

The 5 remains the same so the answer should be 5 to the power of -2

Hope this helps

The base of a rectangular prism has an area of 13 2/3, and the height of the prism is 8 5/6. What is the volume of the prism? Be sure to use this format: whole number numerator/denominator.

Answers

Answer:

120 [tex]\frac{13}{18}[/tex]

Step-by-step explanation:

The formula for finding the volume of a prism is:

V = Bh

You have to convert 13 [tex]\frac{2}{3}[/tex] into an improper fraction, like so:

[tex]\frac{41}{3}[/tex]

Convert the other:

[tex]\frac{53}{6}[/tex]

Multiply:

[tex]\frac{41}{3}[/tex] · [tex]\frac{53}{6}[/tex] = [tex]\frac{2173}{18}[/tex]

Convert to mixed fraction:

120 [tex]\frac{13}{18}[/tex]

Select the equation that represents the graph below.

Answers

Answer:

D)

Step-by-step explanation:

The y intercept is at 3 and it goes up 3 over 2. and since its going up its positive. Remember rise over run.

Answer:

D

Step-by-step explanation:

Slope: 3/2

y-intercept:3

x,y

0,3

2,6

Math question down below

Answers

Answer:

12 large books

Step-by-step explanation:

1) write down a different ratio equivalent to 12 : 3
2) write down a different ratio equivalent to 30 : 24

Answers

1) 24:6
2) 60:48
I just multiplied by 2

Answer: 1) 4:1  2) 60/48

Step-by-step explanation:

1.  12: 3 is the same as 12/3 so you can diving both side by 3.

12:3 ÷ 3/3=4/1

2. 30:24 is the same as 30/24 so you can divide both sides by 6 or multiply both sides by 2.

30/24 * 2/2= 60/48

Dustin works in a department store. He earned $89.00 for working 10 hours last week. At this rate, how much would Dustin earn for working 38 hours?​

Answers

Answer:

$338.20

Step-by-step explanation:

Find out how much Dustin gets for one hour of work, since you are given how much Dustin earns in 10 hours, you divide it by 10 (the number of hours) to find one hour,

89/10=8.9

$8.9 per hour

So 38 hours would be

8.9 x 38= $338.20

Answer:

$338.20

Step-by-step explanation:

In the similar quadrilaterals below, what is the length of AB
10 cm
2.5 cm
8 cm
3 cm


Answers

Answer:

Side AB is 10 cm.

Step-by-step explanation:

The given quadrilaterals ABCD and EFGH are similar.

From the given figure, we can observe the following angles and sides are corresponding.

[tex]\angle A = \angle E=90^\circ\\\angle B = \angle F=63^\circ\\\angle C = \angle G=117^\circ\\\angle D = \angle H=90^\circ[/tex]

Ratio of corresponding sides will be equal:

AB:EF = BC: FG = CD:GH = DA:HE

We have to find the side AB.

Given the sides

EF = 5 cm

BC = 9 cm

DA = 8 cm

EH = 4 cm

So, ratio DA:EH = 8:4 = 2:1

We know that ratio of corresponding sides will be same:

AB:EF = DA:EH

[tex]\Rightarrow \dfrac{AB}{5} = \dfrac{2}{1}\\\Rightarrow AB = 10 cm[/tex]

So, side AB is 10 cm.

complete the square to form a perfect-square trinomial.

2. x^2 - 4x + ?

4. x^2 + 12x + ?

6. x^2 + 18x + ?

(just tell me what the number is for the ? on each problem.)

Answers

Look at the attached picture

Hope it will help you.

Good luck on your assignment

what does the numerator of the fraction 10/6 mean?

Answers

Answer:

6

Step-by-step explanation:

Select all correct conversions.

53 km = 5,300 m
23 cm = 2.3 mm
15 m = 1,500 cm
79 m = 0.079 km
117 mm = 0.117 m
(Which ones are correct?)

Answers

All of them are correct except the first and second one. ( 53 km = 53,000m) (23 cm = 230mm)

The correct conversions are:

15m=1,500cm79m=0.079km117mm=0.117mWhat is unit conversion?

It is a multi-step process that involves multiplication or division by numerical factor, selection  of the correct numbers of significant digits, and rounding.

Equivalent Measurements:

[tex]1km=1000m\\1cm=10mm\\1m=100cm\\1m=1000mm[/tex]

According to the given question:

53km=53×1000m=53000m         (1km=1000m)23cm=23×10mm=230mm             (1cm=10mm)15m=15×100cm=1500cm                (1m=100cm)79m=[tex]\frac{79}{1000} km[/tex][tex]=0.079km[/tex]                    (1m=[tex]\frac{1}{1000}m[/tex])117mm=[tex]\frac{117}{1000}m[/tex][tex]=0.117m[/tex]                     (1mm=[tex]\frac{1}{100} m[/tex])

Hence, the correct conversions are

15m=1,500cm79m=0.079km117mm=0.117m

Learn more about the unit conversion here:

https://brainly.com/question/9484490

#SPJ2

What is the surface area, in square inches, of the
sphere shown below? (SA = 4.0) (pi ≈ 1 3.14)

а. 530.7 sq in.
b. 2122.6 sq in.
с. 4245.3 sq in.
d. 9203 sq in.

Answers

Answer:

hey if you still need the i have them all just finished the test

Step-by-step explanation:

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