MATHEMATICS MIDDLE SCHOOL

How do you find the percent of a number greater than 100?

Answers

Answer 1
Answer:

Answer:

Multiply the number by the percent (e.g. 87 * 68 = 5916)

Divide the answer by 100 (Move decimal point two places to the left) (e.g. 5916/100 = 59.16)

Round to the desired precision (e.g. 59.16 rounded to the nearest whole number = 59)

Step-by-step explanation:

lets say for example 234

234/2 = 117 and the percentage were looking for is ummmm 25% well 25% is 1/4th of 234 making it 1/2 of 117 25% of 234 is 58.8 lets do a harder one what is 47% of 234 Divide n by 100.

Multiply the result by x. making it 109.98

Answer 2
Answer:

Answer:

To find any percentage all you need to do is take the amount you are looking at divided by the total amount. Than multiply the number by 100.

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{1,2,3,...,75,76,78} how many numbers in the set above have 2 as a factor but not have 10 as a factorA) 32
B) 35
C)39
D)40

Answers

Answer:

A) 32

Step-by-step explanation:

From 1 to 10 we have 4 numbers which are {2,4,6,8}

From 10 to 20 we have 4 numbers which are {12,14,16,18}

.

.

.

From 70 to 78 we have 4 numbers which are {72,747,6,78}

conclusion: we 4×8 number = 32

the number 360 is increased by 25% . the result is then decreased by 50% . what is the final number ?

Answers

increased by 25%
25%=0.25
increased by 25% means 360+(360 times 0.25)=360+90=450

decreased by 50%
450 times 0.50=225
450-225=225

answer is 225
25%=.25
360×.25=90
360+90=450
50%=.5
450×.5=225
225 is the final number

If (3+y)/y=7, then y=
Please help :)

Answers

\frac{\big{3+y}}{\big{y}}=7\ \ \ \Rightarrow\ \ \ D:\ y \neq 0\n\n \frac{\big{3+y}}{\big{y}}\cdot y=7\cdot y\n\n3+y=7y\n\ny-7y=-3\n\n-6y=-3\ /:(-6)\n\ny= (3)/(6) \n\ny= (1)/(2) \ \in\ D
(3 + y)/(y) = 7 \n \n 3 +y = 7y \n \n 1y - 7y = -3 \n \n -6y = -3 \n \n y = (-3)/(-6) = (1)/(2) \n \n y = (1)/(2)

The cost of 5 similar digital cameras and 3 similar video cameras is 3213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he pay?

Answers

x\ -\ cost\ of\ digital\ camera\ny\ -\ cost\ of\ video\ camera\n5x+3y=3213\ny=4x\n5x+3\cdot4x=3213\n17x=3213/:17\nx=189\ny=4\cdot189\ny=756\n\n189+756=945
Answer: John pays 945 for a digital camera with a video camera.

I hope I helped :D

Answer:

945

Step-by-step explanation:

Disjoint subsets A and B of a universal set U, except assume that n(U)=120, n(A)=45, and n(B)=50.Then n(A′∪B)=

Answers

Answer:

 n (A'  U  B )  = 75

Step-by-step explanation:

Here, given :  n(U)=120, n(A)=45, and n(B)=50

As we know:

n (A ' U B)  =  n(A) − n (A∩B)   ... (1)

Here, n(A) = 45

So, n( A')  = n(U) - n(A)  = 120 - 45  = 75

⇒ n(A')  = 75

Now, as given A and B are disjoint sets.

⇒   n (A ∩ B)   = Ф

So, (A'  U  B )  = A'

So, n (A'  U  B )  =n( A') = 75

⇒  n (A'  U  B )  = 75

What is the answer to question 6

Answers

x+x+90+x-18=180\n3x=108\nx=36\n\nm\angle Q=36+90=126
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