MATHEMATICS MIDDLE SCHOOL

Which expression is not equivalent to -4x^3+x^2-6x+8?a) x^2(-4x+1)-2(3x-4)
b) x(-4x^2-x+6)+8
c) -4x^3+(x-2)(x-4)
d) -4(x^3-2)+x(x-6)

Answers

Answer 1
Answer:

Answer:

option b is not equal to the given polynomial

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A metal recycling center pays $41.25 for 75 pounds ofaluminum. Which of the following is another possible amountthe metal recycling center would pay for aluminum?A. $19.25 for 35 poundsB. $24.00 for 40 poundsC. $5.35 for 0.25 poundsD. $45.45 for 25 pounds
Thirty four divided by x is the same as 17
Round 156.5934066 to the nearest tenth
Please help me answer Question 1, and 3! Thanks!!!
What is the substitution method?

Which of the following check all that apply

Answers

Answer:

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

Step-by-step explanation:

Sammy had 30 minutes to do a three problem quiz. She spent 101/3 minutes on problem 1 and 54/5 minutes on problem 2. How much time did she have time for problem 3? Write your answer as a mixed number.

Answers

He is left with 13(13)/(15) minutes for the last problem

Step-by-step explanation:

Given

Total time =  30 minutes

Time spent on problem 1: 10(1)/(3) minutes

Time spent on problem 2: 5(4)/(5) minutes

First of all, we will calculate the total time for 2 problems

Time\ for\ two\ problems = 10(1)/(3)+5(4)/(5)\n= (31)/(3) + (29)/(5)\n= (155+87)/(15)\n=(242)/(15)

The remaining time is:

Time\ for\ problem\ 3 = Total\ time - Time\ for\ two\ problems\n= 30 - (242)/(15)\n= (450-242)/(15)\n=(208)/(15)\n= 13(13)/(15)

Hence,

He is left with 13(13)/(15) minutes for the last problem

Keywords: Fractions, mixed fractions

Learn more about fractions at:

#LearnwithBrainly

Carla and Frank can each wash a car and clean the interior in 2 hours, but Missy needs 3 hours to do the work. If the three work together, how long will it take to clean 7 cars?

Answers

Remark

Start by figuring this out for 1 car. Worry about the 7 part when you find 1.

This problem is used quite frequently in physics. For example resistors in parallel use the same equation.

Formula

1/frank + 1/carla + 1/missy = 1/ time taken to do 1 mar.

Givens

Frank = 2 hours

Carla = 2 hours

Missy = 3 hours.

Substitute and Solve

1/2 + 1/2 + 1/3 = 1/Three_together.

3/6 + 3/6 + 2/6 = 1/Three_together.

8/6 = 1/Three_together. Cross multiply

8 * Three_Together = 6*1

8 * Three_Together = 6 Divide by 8

Three_Together = 6/8 = 3/4 = 0.75 hours. or 45 minutes for 1 car

Seven Cars

For 7 cars multiply 0.75 by 7

7 * 0.75 = 5.25 hours. <<<< Answer

Solve the equation.

−3(y+5)=15

Answers

Answer:

y = -10

Step-by-step explanation:

−3(y+5)=15

Divide each side by -3

−3/-3(y+5)=15/-3

y+5 = -5

Subtract 5 from each side

y+5-5 = -5-5

y = -10

Alexia started babysitting when she was in high school. She has built a reputation for herself and has become popular among the neighborhood parents. Alexia charges $10/h and gets a $5 automatic tip. Alexia needs $75 to buy a present for her mother. She wants to find out the minimum number of hours she needs to babysit at one job to get the money she needs. (5 points) a. Write an inequality to show how to solve this problem. Identify what the variable is and what it represents. b. Solve the inequality to find out the minimum number of hours Alexia needs to babysit. Show Your Work.

Answers

h= number of hours worked.

10h+5 ≥75 (1)

10h ≥ 70 (2)

h ≥7 (3)

~please only answer if you know for sure~

Answers

since 10 is smaller than 100, Garricks plant is SHORTER than Zan's plant

This means that each mm for Garrick will result in a GREATER percent error

10-8=2. His measurement was 2 mm off

100-88=12 so Zans answer was 12 mm off

2/10*100=20%

12/100*100=12%

Answers:

1. Shorter
2. Greater
3. 2 mm 
4. 12 mm 
5. 20%
6. 12%

Hope this helped!! :D
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