MATHEMATICS COLLEGE

Help me solve this ok..

Answers

Answer 1

Answer:

Answer is provided in the image attached.

Answer 2

Answer:

3x+3x-5= 1

6x-5=1

Whenever moving a number, the sign always changes.

6x-5+5= 1+5

6x= 1+5

6x= 6

divide both sides by 6

6x/6= 6/6

x= 1

Check solution by using the substitution method

3(1)+3(1)-5=1

3+3-5=1

6-5= 1

1=1

Answer: x=1

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Please help with this fast
A computer shop sold 400 computers last month. And 523 computers were sold this month. What is the percentage increase?

Mary is having a party at the park. She is going to spend $438.The cost to rent the shelter is $15 plus food is going to cost $6
per person. How many people is she having?

Answers

Answer:

70 people

Step-by-step explanation:

428-15=423

423/6=70.5

she can invite 70 people

-(- 3.8a - 9b + 5.8)

Answers

Answer:

3.8a + 9b - 5.8

Step-by-step explanation:

distributing the negative

Point R is on line segment QS. Given RS = 2 and QS = 10, determine the length QR

Answers

Answer: QR=12

Step-by-step explanation:

10+2=12

The graph of a function f is illustrated below. What is the graph of the inverse function of f?

Answers

Answer: I believe that the answer is choice A :)

Step-by-step explanation: Use your phone screen or a mirror to see the reflection across the y=x line :)

the graph of a function f is illustrated below. What is the graph of the inverse function of f? this is a f reflected in the y = x line

A dealer advertises that a certain brand of tire averages 50,000 miles of use before needing to be replaced. Testing this claim, an investigator finds that a sample of 19 randomly selected tires from this dealer had an average lifespan of 48,700 miles with a standard deviation of 4,500 miles. Assume tire life spans are approximately normally distributed. At the α = 0.05 level, find if the investigator can prove the dealer is exaggerating the average lifespan of their tires by performing the hypothesis test.