MATHEMATICS MIDDLE SCHOOL

What is the value of x in the problem -1\2x + 2=3

Answers

Answer 1
Answer: -1/2x + 2 = 3
(move the 2 to the other side of the equal sign, change the sign)
-1/2x = 3 - 2
-1/2x = 1
(swap them to make x positive)
-1 = 1/2x
-1 = 0.5x
(divide both sides by 0.5 to have x alone)
-2 = x

Therefore, x = -2.
Answer 2
Answer: It is -2. X= -2 (I really need to answer more questions to ask more)

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Joyce took out a small loan for $1,200. The interest on the loan was 10.5%, but she paid it off in just 18 months. How much did she pay back in interest?

Answers

Answer:

She paid back $192 in interest

Step-by-step explanation:

A = P(1+r)^n

P = $1,200

r = 10.5% = 0.105

n = 18 months = 18/12 = 1.5 years

A = 1,200(1+0.105)^1.5 = 1,200(1.105)^1.5 = 1,200×1.16 = 1,392

Amount = $1,392

Principal = $1,200

Interest = amount - principal = $1,392 - $1,200 = $192

How does the reasonable domain differ from themathematical domain?
The reasonable domain is the set of natural numbers.
O
The reasonable domain is the set of positive real
numbers.
The reasonable domain is the set of real numbers
greater than 3.25.
The reasonable domain is the set of whole numbers
greater than 3.25.
O

Answers

Answer:

The reasonable domain is the set of natural numbers.

Step-by-step explanation:

When we talk about a reasonable domain for a function, we refer to all values inside the domain set that makes sense to the problem which models the function. For example, if the function models people's age, then the reasonable domain must be all positive integers.

In this case, we have the function

f(x)=3.25x

Where x represents the number of cars.

The mathematical domain refers to the comple domain set, using negative and positive numbers. However, the mathematical domain doesn't make sense to this problem, because the domain represents cars, and they cannot be represented by negative numbers and decimals.

So, the reasonable domain to this function is the set of all natural numbers, because they are positive and integers.

Therefore, the right answer is the first choice.

What is 83/9 as a whole or mixed number

Answers

mixed number: 9 2/9

1. How many 9's go into 83 
2. It is 9 because 9*9 = 81                         9*10=90 is bigger so not possible
3. 2 is left because 83-81 = 2
4. And don't forget the denominator
9 goes in to 81-- 9 times.
83 minus 81 is 2...as a mixed number of is that 9 2/9

5) Rolanda scored 20, 15, and 16 on her first three math quizzes. Jetta scored 16, 19, and 17 on her quizzes. Using e the mean to compare, who has the higher math quiz scores so far?

Answers

Roland; 20+15+16=51, 51÷3= 17
Roland; 17
 We divide 3 because it's the total number of grade she got.
Jetta; 16+19+17=52, 52÷3= 17.1
Jetta; 17.1
 So, probably Jetta got better grade than Rolanda 

Answer: Jetta got better grade than Rolanda

Step-by-step explanation:

Please help me with this !!!!!!!!!!!!!!!!

Answers

Answer:

option D. 29

Step-by-step explanation:

since the selling price per mow on weekdays is 45 so divide the total earned with the price

1305 / 45 =29

this is the answer

Jordan drove for 6 hours at 55 miles per hour, while Matt drove for 3 hours at 60 miles per hour. If Isaac drove 82 miles longer than Jordan and Matt drove combined, for how many miles did Isaac drive?--------- miles

(Hint: Rate × Time = Distance)

Answers

If you look at the equation, we have to multiply the hour and the mph(miles per hour) together to find how many miles they drove. For Jordan, we would have to multiply 6 times 55 which is 330. Jordan drove 330 miles. For Matt, we have to multiply 3 times 60, which gets us 180. Together, they would have drove 510 miles. If Isaac drove 82 miles longer than Jordan and Matt drove combined, we would get 582 miles. Isaac drove 592 miles.
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