MATHEMATICS MIDDLE SCHOOL

Find the students error in solving the following inequality 2<-3x-4<56<-3x<5
-2>x>-5/3

Answers

Answer 1
Answer:

Answer:

The student did not add 4 to all sides of the inequality

Step-by-step explanation:

2<-3x - 4<5

Add 4 to all sides

4 + 2< -3x - 4 + 4 < 5 + 4

6< -3x < 9

Divide all sides by the coefficient of x; -3

-2< x < -3

Remember, when dividing an inequality with a negative number, you must flip the sign

So, this becomes;

-2 > x > -3

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A cone and a cylinder have congruent height and bases. The volume of the cone is 18. What is the volume of the cylinder? Explain please and thank you!
What's the volume of 5in , 9in, 10in,and 11in

PLEASE HELP ME, i need it

Answers

Answer:

c.

Step-by-step explanation:

volume=(4)/(3) \pi r^3=(500 \pi )/(3)\nr^3=(500)/(4)=125=5^3\nr=5

radius of custom made version=4×5=20 inches

A magazine advertises that a subscription price of $29.99 for (12 issues) represents a savings of 70% from the newsstand price. What is the price of 1 issue at the newsstand?

Answers

It would be bout 2.50 for on issue. Hope that helped

Given that the volume of a cube is 2744 cm3 find the length of its edge

Answers

the answer is 14 mm 
hope it helps :)

A circular Petri dish has a diameter of 10 centimeters. If the dish contains 2.450 bacteria, what is thepopulation density of bacteria in the dish?
(1) 31 bacteria per square centimeter
(2) 42 bacteria per square
centimeter
(3) 48 bacteria per square centimeter
(4) 51 bacteria per square centimeter​

Answers

Answer:  31 bacteria per square centimiter.

Step-by-step explanation:

The correct number of bacteria in the question is 2,450.

Hi, to answer this question we have to apply the next formula:

Area of a circle = π x (diameter/2) ^2

Replacing with the values given:

A = π x (10/2) ^2

A = π x (5) ^2

A = π x 25 = 78.54 cm2

Next, we have to divide the number of bacteria (2,450) by the area of the dish  

2450 / 78.54 = 31.19 = 31 bacteria per square centimiter.

Feel free to ask for more if needed or if you did not understand something.  

Gentry poured 23.5 ounces of milk and 7.75 ounces of cream in a mixing bowl.How much more cream could Gentry add to the bowl if the capacity of the bowl is 35.5 ounces?

Answers

Notice that because the capacity of the bowl is 35.5 ounces, but there has already been 31.25 ounces total added to it (23.5 ounces + 7.75 ounces), all that needs to be done is subtract 31.25 from 35.5:
35.5 - 31.25 = 4.25 ounces of cream could be added

Blaine can make somewhere between 16 and 23 parking signs an hour. He needs 14 hours to set up his work station. About how many signs could he make in forty hours?A. 650 signs
B. 800 signs
C. 1,000 signs
D. 1,500 signs

Answers

Blaine could make approximately 650 signs in forty hours.

Calculate the working hours

Blaine needs 14 hours to set up his work station. So, out of the total 40 hours, he will have

=> 40 - 14 = 26 hours to actually work on making signs.

Calculate the minimum number of signs he can make

If Blaine makes 16 signs per hour, then in 26 hours, he will make a minimum of

=> 16 * 26 = 416 signs.

Calculate the maximum number of signs he can make

If Blaine makes 23 signs per hour, then in 26 hours, he will make a maximum of

23 * 26 = 598 signs.

Calculate the average number of signs he can make

To get a more reasonable estimate, we take the average of the minimum and maximum number of signs:

Average = (Minimum + Maximum) / 2

= (416 + 598) / 2  = 650 signs.

Hence the correct option is (a).

To know more about average here

brainly.com/question/16956746

#SPJ2
a. 650 signs , take away 14 hours
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