MATHEMATICS MIDDLE SCHOOL

What’s the answer to 9 and 10???

Answers

Answer 1

Answer:

Hey!

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Question 9:

3x = 15

3x/3 = 15/3

x = 5

c. Division

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Question 10:

x - 10 = 2

x + (-10) = 2

x + (-10) + 10 = 2 + 10

x = 12

c. Addition

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Hope this helped, good luck!

Answer 2

Answer:

Answer:

9. C. division

10. D. addition

Step-by-step explanation:

When solving for X the goal is to get it all by itself on one side of the equation and to do that you have to undo the operations already in effect on it. In number 9 the x is multiplied by 3 so to undo that you would need to divide by 3 and that would cancel out leaving the x by itself. Then you would need to divide by 3 on the other side of the equation also to keep it balenced. In number 10 the X is connected to the 10 through subtraction so to cancel that out you would subtract 10 from both sides to get the X alone.

I hope this helps and please don't hesitate to ask if there is anything still unclear!

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I dont get what to do

Answers

I'm pretty sure you're just solving for x. For example, in 26. You have:
x/18 = 4.5
You multiply both sides by 18 to get the x by itself
x = 4.5 • 18
You simplify this
x = 81

24. x= 15.625
26. x= 81
28. x= 980
30. x=2

What is the length of a phone call that would cost the same no matter what company is used?Company A - 0.35cents plus 0.3cents per minute
Company B - 0.45cents plus 0.2cents per minute

Answers

Answer: The length of phone call is 1 minute that would cost the same for both the companies.

Step-by-step explanation:

Since we have given that

Company A - 0.35cents plus 0.3cents per minute

Company B - 0.45cents plus 0.2cents per minute

Let the number of minute be x.

So, our equation for company A would be

$0.35+0.3x$

our equation for company B would be

$0.45+0.2x$

According to question, length of phone call that would cost the same.

so, our equation becomes

$0.35+0.3x=0.45+0.2x\n\n0.3x-0.2x=0.45-0.35\n\n0.1x=0.10\n\nx=(0.10)/(0.1)\n\nx=1$

Hence, the length of phone call is 1 minute that would cost the same for both the companies.

company A- 0.35cents plus 0.3cents per minute.

Two increased by the product of a number and 9 is greater than or equal to 25.

Answers

Answer:

x≥2.56

Step-by-step explanation:

first we can write the inequality

2+9x≥25

we can now solve this with algebra

9x≥23

x≥2.56

2+2 x 4 what is the answer

Answers

Answer: 10

Step-by-step explanation: The order of operations gives us instructions on how to simplify expressions that contain more than one operation.

In this problem, we have both addition and multiplication.

According to order of operations, we must do the multiplication before the addition.

So here, our first step is to multiply 2 × 4 which is 8 and we have 2 + 8 which is 10.

Notice that if we had added first then multiplied, we would have had 2 + 2 which is 4 and 4 × 4 is 16 which is an incorrect answer.

You can see that order of operations is very important.

Answer:the answer is 10

Step-by-step explanation:

Need help on 13 someone explain

Answers

Angle 1 is supplementary to the 100 degree angle, making it 80. 180-100 =80. Angle 1 is also supplementary to angle 2. They are cut by parallel lines making angle 2=100 degrees.

Help me 3x+1/10=x-1/7 ok so I understand that I'm supposed to cross multiply so 1 x 10=10 7x3=21 so now do i do 21x-7? please Help