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Sloan [31]
4 years ago
13

Ashley was going to sell all of her stamp collection to buy a video game. After selling half of them she changed her mind. She t

hen bought nine more. How many did she start with if she now has 39?
Mathematics
1 answer:
belka [17]4 years ago
8 0
Well in this problem we just have to work backwards doing everything opposite of what she did in order to get the final answer.
so she has 39 stamps at this moment. and since she bought nine more stamps lets subtract that value to see what she had before that.
 1.) 39 - 9 = 30
now she has 30. but she said that before step one she sold half of them to buy that video game. so she divided her starting number by two. so again we are going to work backwards by multiplying the number by 2:)
2.) 30 x 2 = 60!!
3.) So she started out with 60 stamps 
answer is 60:)
hope i helped
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STatiana [176]

Well it is a simple percentage question that we have to solve.

As we know that William made 620 by baby sitting and we also know that he made 340 per cent more next year so we can simply calculate 340 per cent of 620 and then add that percentage value to 620 to calculate the final answer.

So 340 / 100 * 620 equals to 2108 so the final answer is 2108 + 620 which becomes 2728.

4 0
4 years ago
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Given the polynomial function below, find Æ-5).<br> F(x) = x - 22-7
Luba_88 [7]

Answer:

f(-5)= 28

Step-by-step explanation:

The function is:

f(x)= x^2-2x-7

To find the answer put the value of -5 for all x's.

f(x)= x^2-2x-7

f(-5)=(-5)^2 - 2(-5)-7

f(-5)=25+10-7

f(-5)=35-7

f(-5)= 28 ...

3 0
4 years ago
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PLEASE HELP I NEED IT BEFPRE 11:59
Brut [27]

Step-by-step explanation:

If np is attitude

5x^2+10=90

5x^2=80

x^2=16

X=+-4

angle npo=90 degeees

3 0
3 years ago
ONLY NEED TO DO 6, 8, 10, 12, 14.
zimovet [89]

Answer:

  • 6 = (2,2)
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Step-by-step explanation:

Midpoint = (\frac{x_2+x_1}{2} , \frac{y_2+y_1}{2}  )\\

6.

(5.8) =(x_1,y_1)\\(-1,-4) =(x_2,y_2)\\\\Midpoint =\left(\frac{-1+5}{2},\:\frac{-4+8}{2}\right)\\\\Midpoint =( \frac{4}{2} , \frac{4}{2} )\\\\Midpoint = ( 2 , 2)

8.

(-3 ,-7) =(x_1 ,y_1)\\(3,-5)=(x_2,y_2)\\\\\left(\frac{3-3}{2},\:\frac{-5-7}{2}\right)\\  \\Midpoint = (\frac{0}{2} , \frac{-12}{2} )\\\\Midpoint = ( 0, -6)

10.

L(-9 ,4) =(x_1 ,y_1)\\K(2 , -1 ) = (x ,y )\\M(x_2 ,y_2 )=?\\ \\x = \frac{x_2+x_1}{2}\\ 2 = \frac{x_2 +(-9)}{2}\\ 2 = \frac{x_2-9}{2}\\ Cross\:Multiply\\\\4 =x_2-9\\4+9=x_2\\13 =x_2\\\\y = \frac{y_2+y_1}{2}\\ -1 = \frac{y_2 +4}{2} \\-1 \times 2= y_2+4\\-2 =y_2+4\\-2-4 =y_2\\-6 =y_2\\\\(x_2 ,y_2) = (13 , -6)\\

7 0
3 years ago
What is the sum of the whole number and the improper fraction?
Wittaler [7]

Answer:

There are no numbers/pictures.

Step-by-step explanation:

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