MATHEMATICS MIDDLE SCHOOL

Evaluate the expression. Express the result in scientific notation.(9.08 × 106) – (2.25 × 105)

Answers

Answer 1
Answer:

Answer: 8.855*10^6

Step-by-step explanation:

Scientific notation has the form:

a*10^n

Where "a" is a number between 1 and 10 but less than 10 and "n" is a integer.

To make the subtraction, the bases must have the same exponent.

Then you can move the decimal point of 2.25 one place to the left, then:

(9.08*10^6)-(0.225*10^6)

Now you can make the subtraction. Then you get:

8.855*10^6
Answer 2
Answer:

Answer:

Step-by-step explanation:

step 1: do (9.08 x 106) and (2.25 × 105) first

Step 2: bring down the minus sign

Step 3: subtract

Step 4: you should get 726.23 as your final answer

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Answers

The formula for the area of a triangle is (Base x Height)/2
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the mean of a set of data is 45 years. find the missing numbers in the data set 40, 45, 48, ? 54, ? 45. Explain the method or strategy you used

Answers

If the number is missing, it's safe to say we can turn it into a variable, because it is unknown. We'll call this variable u, which stands for "unknown". Now, think about this: Mean is all of the values added together divided the amount of values. We'll need to work backwards to find the number. To better see how, write out what we know so far:

(40 + 45 + 48 + u + 54)/5= 45. Why are we dividing by 5? Because there are 5 values you need to add together :)

     Now what? Well, now, it's like a normal equation! Just solve for the variable "u"! :) First, combine like terms. Add all of the numbers you know together. You should get this:

(187+u)/5=45
     What do you do first? Ask the order of operations! Order of operations says multiplication and division come before addition and subtraction, so we have to get rid of that /5 in the equation. How do we do this? We use inverse operations. What's the opposite of division? Multiplication! However, whatever you do to one side of the equation, you must do to the other. Multiply both sides by 5. ((187+u)/5)*5... Do you see how the /5 and the *5 cancel out? On that side, you're left with 187+u. For the other side, =45, you also need to multiply by 5. 45*5=225. 
     Now, you're left with 187 + u = 225. What next? This is a basic equation; subtract 187 from both sides; 187-187 is 0, and 225 - 187 is 38. 0 + u =38 is what you get. Of course, that's just u=38.  Wait.... didn't "u" stand for "unknown"? That means that 38 is your missing value! You've found the answer!

Captain amazing needs your help!!He has been given a secret 4 acre lot by the government to train his mighty minions.he wants to divide the big lot into 2/3 acre lots.how many lots can be created?

Answers

6 lots can be created because if you do 4 divided by 2/3 you get 6
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Answers

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Laticia randomly selected 25% of the seventh-grade students in her school an asked them their favorite season.Of the students surveyed,51 chose summer as their favorite season. Based on the data, what is the most reasonable prediction of the number of seventh-grade students in her school who would choose summer as their favorite season.

Answers


if 25% is 51 students an easy way of finding it would be adding 51 4 times. so the answer should be 204. unless im wrong then im sorry.
25% is equal to 1/4. If 51 is 25% of the students, that means it is 1/4. To find the total amount of students who would choose summer, you multiply 51 x 4 and you get 204 students, give some/take some. Hope this helps!
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