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
(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!
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What are integers in mathematics?
solve for y
please I need help
Answers
Answer:
The answer is y = -2.
Step-by-step explanation:
To start, you need to cross multiply to solve.
3/y = 6/(y -2)
y*6 = 3*(y -2)
6y = 3y - 6
3y = -6
y = -2
please show your work and find what y equals, thanks!
Answers
31= 6.2*y
31= 6.2y
Divide both sides by 6.2
31/6.2= 6.2y/6.2y
Y= 5
Checking the Answer: Plug in the answer for Y
31= 6.2(5)
31= 31
Answer is right if the solution work out.
31=6.2 times y
y=5 because 6.2 tines 5 equals 31
Answers
22^3= 10,648
Because both bases are the same of 22 you can subtract the exponents. (7-4)=3 Therefore the answer is 22^3 or 22 cubed. (22x22x22=10,648)
Answers
The answer is 43.3 Celsius
it would be 43.333....
Answers
There are 975 girls in the school.
What is the unitary method?
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Given that there are 1,500 students in a school. 65% of them are girls.
We need to find the 65% of 1500.
65/100 x 1500/1
The two "zeros" in "100" cancel out and the two "zeros" in "1500" cancel out And we are left with:
65/1 x 15/1 = 65 x 15 = 975 girls.
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So 1,500 x 65 is 97,500.
97,500 divided by 100 is 975.
The final answer is that there are 975 girls in the school.
Answers
= 0.02
What does Division mean in math?
The division is the method of distributing the group of things into equal parts. It is 1 of the 4 basic operations of arithmetic, which gives the fair result of sharing. The division is the operation inverse of multiplication. If 3 groups of 4 make 12 in multiplication; 12 divided in to 3 equal groups give 4 in each group in division.
Is Division considered basic math?
Division is 1 of the 4 basic operations of arithmetic, the ways that numbers combined of make new numbers. The other operations are addition, or subtraction, and multiplication .
Divide 89 by 4356
Learn more about Division here brainly.com/question/2273245
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