How are a common denominator and a common multiple alike and different?

Answers

Answer 1

Answer: The Common Denominator is the bottom part of a fraction which has been matched to 2 or more fractions. For example 1/2 + 1/4 is easier if you use 2/4 + 1/4 = 3/4. You can also use it for 3/5 + 1 2/3 Becomes 3/5 + 5/3 (Improper fraction) and you change that to 9/15 + 25/15 = 34/15 = 2 4/15

Answer 2

Answer: A common denominator and common multiple are alike because they both go on the bottom portion of the fraction and in order to get the common denominator you need to find the common multiple of numbers.

They are different because they have different purposes and the common denominator stays the same and the common multiple is supposed to change both or one number.

hope this helped

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The test scores for a group of students are shown. 87, 72, 98, 84, 72, 65, 72, 70, 58, 91, 81, 84
What is the mode of the scores?
A.
84
B.
78.8
C.
98
D.
85.5

Answers

Mode is the number that occurs most often. Out of those numbers, 72 would be the mode. But since that's not an option, I would say 84.

the mode is 72 because 72 appears three times and the others are shown twice but 72 isn't an answer and the only other one with the most often is 84 which appears twice so the answer would be A

What is 10t=6t+24 than you!

Answers

When you solve an equation, the most important thin got remember is isolate the variable. So try to get t by itself using order of operations backwards.

10t = 6t + 24 Subtract 6t from both sides to get the t's on one side.

4t = 24 Divide both sides by 4 to get t completely alone.

t = 6

Arnie's car used 100 cups of gasoline during a drive.He paid $3.12 per gallon of gas.How much did the gas cost?

Answers

There are 16 cups in a gallon. Divide 100 into 16 to get 6.25. You now just multiply 3.12 by 6.25 to get 19.5. Your answer is $19.50. Hope this helps!

Solve for v s= 1/2a2v + c

Answers

Answer:

v= −2c+2s / a^2

Step-by-step explanation:

1) Shane works at a computer store. If he earns $20.93 from a 7% commission on the sale of a printer, what is the price of the printer?2) Kayla earns a weekly salary of $290 plus a 5.5% commission on sales at a gift shop. How
much would she make in a week if she sold $5700 worth of merchandise?

3) Heather works in a clothes shop, where she earns a commission of 5% and no weekly salary. What will Heather's weekly sales have to be for her to earn $375 in one week?

4) The sales tax rate in Brad's town is 4.25%. If he buys 3 lamps for $22.49 each and a sofa for $829.99, how much sales tax does he owe?

Answers

1. he earns 20.93 which is 7% of the price of the printer so 7%=7/100 so
20.93=7/100 so here is a little trick
so we want to know what 100% is so
we know that 1/2 is equal to 4/8 so since they are equal, we can flip one of them and if we multiply them with each other, we will get 1/1 or 1 so 1/2 times 8/4=8/8 or 1 so

20.93/x (x=100%)
20.93/x=7/100 so
20.93/x times 100/7=1
2093/7x=1
multiply both sides by 7x
2093=7x
divide both sides by 7
299=x
the printer cost $299

2.so 290+5.5% of sales
sales=5700
5.5%=0.055
'of' can be thought of as multiply so
0.055 times 5700=313.5
290+313.5=603.5=what she made that week

3. she earns 5% and that's all she earns
5%=375
a hack is that 5 times 200=100 so
5% times 20=100% so
375 times 20=100%=$7500=amount that needs to be sell to get 375

4. so he buys 3 laps at 22.49 each and 829.99 with 4.25% or
3 times 22.49=67.47+829.99 times 4.25% or
897.46 times 4.25% or 897.46 times .0425 and get $38.1421 sales tax owed

1. 20.93 is 7% of something. Divide 20.93 by 7 and you get 2.99, which is 1% of something Multiply 2.99 by 100 to get the original value, $299

2. 5.5% of 5700 is 313.5. Add that to 290 to get $603.5

3. The $375 that she earns is 5% of what she has sold. Multiply 375 by 20 to get $7500, how much she needs to sell

4. The total cost of the 3 lamps is 22.49x3, 67.47. Add that to 829.99 to get 897.46. Multiply that by 0.0425 (4.25%) to get 38.14205, or just 38.14 in sales tax

9(3+c+4) use distributive property to simplify the expression